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		<id>https://www.designingbuildings.co.uk/w/index.php?action=history&amp;feed=atom&amp;title=Power_surge</id>
		<title>Power surge - Revision history</title>
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		<updated>2026-05-19T11:35:39Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=245967&amp;oldid=prev</id>
		<title>Designing Buildings at 10:48, 6 January 2023</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=245967&amp;oldid=prev"/>
				<updated>2023-01-06T10:48:35Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
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		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 10:48, 6 January 2023&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[File:Power_surge_lightning_banner.jpg|link=File:Power_surge_lightning_banner.jpg]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[File:Power_surge_lightning_banner.jpg|link=File:Power_surge_lightning_banner.jpg]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;A power surge is when&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, for a short period and &lt;/del&gt;unusually high voltage occurs in an electrical system &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;or systems&lt;/del&gt;. It may also be referred to as a transient surge because it involves a transient wave of voltage, current or power which usually occurs between the normal waves of voltage. The over voltage can be additive or subtractive with positive or negative polarity lasting less than a half-cycle, or at little as 50 microseconds but surges can reach 6000 Volts and 3000Amps which can cause damage.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;A power surge is when &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;an &lt;/ins&gt;unusually high voltage occurs in an electrical system &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;for a short period&lt;/ins&gt;. It may also be referred to as a transient surge because it involves a transient wave of voltage, current or power which usually occurs between the normal waves of voltage. The over voltage can be additive or subtractive with positive or negative polarity lasting less than a half-cycle, or at little as 50 microseconds but surges can reach 6000 Volts and 3000Amps which can cause damage.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Power surges often occur after power cuts or blackouts &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;where a surge in power is likely to occurs &lt;/del&gt;as systems are reinstalled or turned on again. Lightening strikes can cause power cuts but can also cause power surges as the systems absorb the excess electrical power of the lightening strike, which can damage equipment plugged into the circuit. Other common causes of power surges are &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;from &lt;/del&gt;faulty wiring and when systems are overloaded or drawing too much power.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Power surges often occur after power cuts or blackouts as systems are reinstalled or turned on again. Lightening strikes can cause power cuts but can also cause power surges as the systems absorb the excess electrical power of the lightening strike, which can damage equipment plugged into the circuit. Other common causes of power surges are faulty wiring and when systems are overloaded or drawing too much power.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Occurrences where systems draw &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;to &lt;/del&gt;much power can be localised to individual &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;dwellings &lt;/del&gt;where for example &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;to &lt;/del&gt;many pieces of equipment are plugged into the same socket, drawing too much power which can cause damage or in some cases fire. These events can also occur on a wider scale such as for example during what is known as TV pickup, which describes the phenomenon of many people &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;unintentionally demand &lt;/del&gt;power at the same time which might happen during commercial TV breaks when viewers all put the kettle on at the same time. One example of this occurred at the end of the FIFA World Cup semi-final after a penalty shoot-out between England v West Germany in 1990 when the UK demand at that point was 2800 megawatts.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Occurrences where systems draw &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;too &lt;/ins&gt;much power can be localised to individual &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;buildings &lt;/ins&gt;where for example &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;too &lt;/ins&gt;many pieces of equipment are plugged into the same socket, drawing too much power which can cause damage or in some cases fire. These events can also occur on a wider scale such as for example during what is known as TV pickup, which describes the phenomenon of many people &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;demanding &lt;/ins&gt;power at the same time&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/ins&gt;which might happen during commercial TV breaks when viewers all put the kettle on at the same time. One example of this occurred at the end of the FIFA World Cup semi-final after a penalty shoot-out between England v West Germany in 1990 when the UK demand at that point was 2800 megawatts.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Common methods exist to deal with power surges, most of which aim to earth any excess power from a lightening bolt safely to the ground rather than through an electrical system, many of which are written into installation guidance or recommended by the building regulations such as lightening protection systems. Other practical measures to avoid damage to individual equipment during a power surge that occurs after a power cut (or during a storm with likely lightening bolts) &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;is to physically unplug &lt;/del&gt;equipment from those circuit, thus removing the risk to individual appliances or earthing individual appliances within the circuit.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Common methods exist to deal with power surges, most of which aim to earth any excess power from a lightening bolt safely to the ground rather than through an electrical system, many of which are written into installation guidance or recommended by the building regulations such as lightening protection systems. Other practical measures to avoid damage to individual equipment during a power surge that occurs after a power cut (or during a storm with likely lightening bolts) &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;include unplugging &lt;/ins&gt;equipment from those circuit, thus removing the risk to individual appliances or earthing individual appliances within the circuit.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Related articles on Designing Buildings =&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Related articles on Designing Buildings =&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 14:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 14:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Electrical wiring.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Electrical wiring.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Earthing.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Earthing.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;* Factors affecting property insurance premiums.&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;* JCT 98 Contract Insurances.&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Lightning protection system.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Lightning protection system.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;* Pyro-cumulonimbus plumes.&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Power cut.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Power cut.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* TV pickup.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* TV pickup.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;=&amp;#160; =&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:DCN_Commentary]] [[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Regulations]] [[Category:Standards_/_measurements]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:DCN_Commentary]] [[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Regulations]] [[Category:Standards_/_measurements]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244477&amp;oldid=prev</id>
		<title>Editor at 06:50, 12 December 2022</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244477&amp;oldid=prev"/>
				<updated>2022-12-12T06:50:21Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
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		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 06:50, 12 December 2022&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[File:&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Power surge lightning banner&lt;/del&gt;.jpg]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[File:&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Power_surge_lightning_banner.jpg|link=File:Power_surge_lightning_banner&lt;/ins&gt;.jpg]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;A power surge is when, for a short period and unusually high voltage occurs in an electrical system or systems. It may also be referred to as a transient surge because it involves a transient wave of voltage, current or power which usually occurs between the normal waves of voltage. The over voltage can be additive or subtractive with positive or negative polarity lasting less than a half-cycle, or at little as 50 microseconds but surges can reach 6000 Volts and 3000Amps which can cause damage.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;A power surge is when, for a short period and unusually high voltage occurs in an electrical system or systems. It may also be referred to as a transient surge because it involves a transient wave of voltage, current or power which usually occurs between the normal waves of voltage. The over voltage can be additive or subtractive with positive or negative polarity lasting less than a half-cycle, or at little as 50 microseconds but surges can reach 6000 Volts and 3000Amps which can cause damage.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 19:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 19:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Pyro-cumulonimbus plumes.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Pyro-cumulonimbus plumes.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Power cut.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Power cut.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;* TV pickup.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;=&amp;#160; =&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;=&amp;#160; =&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:DCN_Commentary]] [[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Regulations]] [[Category:Standards_/_measurements]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:DCN_Commentary]] [[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Regulations]] [[Category:Standards_/_measurements]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244476&amp;oldid=prev</id>
		<title>Editor at 06:23, 12 December 2022</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244476&amp;oldid=prev"/>
				<updated>2022-12-12T06:23:14Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 06:23, 12 December 2022&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;[[File:Power surge lightning banner.jpg]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;A power surge is when, for a short period and unusually high voltage occurs in an electrical system or systems. It may also be referred to as a transient surge because it involves a transient wave of voltage, current or power which usually occurs between the normal waves of voltage. The over voltage can be additive or subtractive with positive or negative polarity lasting less than a half-cycle, or at little as 50 microseconds but surges can reach 6000 Volts and 3000Amps which can cause damage.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;A power surge is when, for a short period and unusually high voltage occurs in an electrical system or systems. It may also be referred to as a transient surge because it involves a transient wave of voltage, current or power which usually occurs between the normal waves of voltage. The over voltage can be additive or subtractive with positive or negative polarity lasting less than a half-cycle, or at little as 50 microseconds but surges can reach 6000 Volts and 3000Amps which can cause damage.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244465&amp;oldid=prev</id>
		<title>Editor at 16:22, 11 December 2022</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244465&amp;oldid=prev"/>
				<updated>2022-12-11T16:22:48Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 16:22, 11 December 2022&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 3:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 3:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Power surges often occur after power cuts or blackouts where a surge in power is likely to occurs as systems are reinstalled or turned on again. Lightening strikes can cause power cuts but can also cause power surges as the systems absorb the excess electrical power of the lightening strike, which can damage equipment plugged into the circuit. Other common causes of power surges are from faulty wiring and when systems are overloaded or drawing too much power.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Power surges often occur after power cuts or blackouts where a surge in power is likely to occurs as systems are reinstalled or turned on again. Lightening strikes can cause power cuts but can also cause power surges as the systems absorb the excess electrical power of the lightening strike, which can damage equipment plugged into the circuit. Other common causes of power surges are from faulty wiring and when systems are overloaded or drawing too much power.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Occurrences where systems draw to much power can be localised to individual dwellings where for example to many pieces of equipment are plugged into the same socket, drawing too much power which can cause damage or in some cases fire. These events can also occur on a wider scale such as for example during what is known as TV pickup, which describes the phenomenon of many people unintentionally demand power at the same time which &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;migth &lt;/del&gt;happen during commercial TV breaks when &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;brits &lt;/del&gt;all put the kettle on. One example of this occurred at the end of the FIFA World Cup semi-final after a penalty shoot-out between England v West Germany in 1990 when the UK demand at that point was 2800 megawatts.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Occurrences where systems draw to much power can be localised to individual dwellings where for example to many pieces of equipment are plugged into the same socket, drawing too much power which can cause damage or in some cases fire. These events can also occur on a wider scale such as for example during what is known as TV pickup, which describes the phenomenon of many people unintentionally demand power at the same time which &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;might &lt;/ins&gt;happen during commercial TV breaks when &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;viewers &lt;/ins&gt;all put the kettle on &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;at the same time&lt;/ins&gt;. One example of this occurred at the end of the FIFA World Cup semi-final after a penalty shoot-out between England v West Germany in 1990 when the UK demand at that point was 2800 megawatts.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Common methods exist to deal with power surges, &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;some &lt;/del&gt;of &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;which are designing into or recommended by most building regulations such as lightening protection systems &lt;/del&gt;which aim to earth any excess power from a lightening bolt safely to the ground rather than through an electrical system. Other practical measures to avoid damage to individual equipment during a power surge that occurs after a power cut (or during a storm with likely lightening bolts) is to physically unplug equipment from those circuit, thus removing the risk to individual appliances.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Common methods exist to deal with power surges, &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;most &lt;/ins&gt;of which aim to earth any excess power from a lightening bolt safely to the ground rather than through an electrical system&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, many of which are written into installation guidance or recommended by the building regulations such as lightening protection systems&lt;/ins&gt;. Other practical measures to avoid damage to individual equipment during a power surge that occurs after a power cut (or during a storm with likely lightening bolts) is to physically unplug equipment from those circuit, thus removing the risk to individual appliances &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;or earthing individual appliances within the circuit.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;= Related articles on Designing Buildings =&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;* Amendment 3 BS 7671 Requirements for Electrical Installations IET Wiring Regulations.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;* Electrical wiring.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;* Earthing.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;* Factors affecting property insurance premiums.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;* JCT 98 Contract Insurances.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;* Lightning protection system.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;* Pyro-cumulonimbus plumes.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;* Power cut&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;=&amp;#160; =&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;[[Category:DCN_Commentary]] [[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Regulations]] [[Category:Standards_/_measurements]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244464&amp;oldid=prev</id>
		<title>Editor at 16:05, 11 December 2022</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244464&amp;oldid=prev"/>
				<updated>2022-12-11T16:05:07Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 16:05, 11 December 2022&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 5:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 5:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Occurrences where systems draw to much power can be localised to individual dwellings where for example to many pieces of equipment are plugged into the same socket, drawing too much power which can cause damage or in some cases fire. These events can also occur on a wider scale such as for example during what is known as TV pickup, which describes the phenomenon of many people unintentionally demand power at the same time which migth happen during commercial TV breaks when brits all put the kettle on. One example of this occurred at the end of the FIFA World Cup semi-final after a penalty shoot-out between England v West Germany in 1990 when the UK demand at that point was 2800 megawatts.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Occurrences where systems draw to much power can be localised to individual dwellings where for example to many pieces of equipment are plugged into the same socket, drawing too much power which can cause damage or in some cases fire. These events can also occur on a wider scale such as for example during what is known as TV pickup, which describes the phenomenon of many people unintentionally demand power at the same time which migth happen during commercial TV breaks when brits all put the kettle on. One example of this occurred at the end of the FIFA World Cup semi-final after a penalty shoot-out between England v West Germany in 1990 when the UK demand at that point was 2800 megawatts.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Common methods exist to deal with power surges, some of which are designing into or recommended by most building regulations such as lightening protection systems which aim to earth any excess power from a lightening bolt safely to the ground rather than through an electrical system. Other practical measures to avoid damage to individual equipment during a power surge that occurs after a power cut ( or during a storm with likely lightening bolts) is to physically unplug equipment from those circuit, thus removing the risk to individual appliances.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Common methods exist to deal with power surges, some of which are designing into or recommended by most building regulations such as lightening protection systems which aim to earth any excess power from a lightening bolt safely to the ground rather than through an electrical system. Other practical measures to avoid damage to individual equipment during a power surge that occurs after a power cut (or during a storm with likely lightening bolts) is to physically unplug equipment from those circuit, thus removing the risk to individual appliances.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244463&amp;oldid=prev</id>
		<title>Editor at 16:04, 11 December 2022</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244463&amp;oldid=prev"/>
				<updated>2022-12-11T16:04:32Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 16:04, 11 December 2022&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 3:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 3:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Power surges often occur after power cuts or blackouts where a surge in power is likely to occurs as systems are reinstalled or turned on again. Lightening strikes can cause power cuts but can also cause power surges as the systems absorb the excess electrical power of the lightening strike, which can damage equipment plugged into the circuit. Other common causes of power surges are from faulty wiring and when systems are overloaded or drawing too much power.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Power surges often occur after power cuts or blackouts where a surge in power is likely to occurs as systems are reinstalled or turned on again. Lightening strikes can cause power cuts but can also cause power surges as the systems absorb the excess electrical power of the lightening strike, which can damage equipment plugged into the circuit. Other common causes of power surges are from faulty wiring and when systems are overloaded or drawing too much power.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Occurrences where systems draw to much power can be localised to individual dwellings where for example to many pieces of equipment are plugged into the same socket, drawing too much power which can cause damage or in some cases fire. These events can also occur on a wider scale such as for example &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;happens &lt;/del&gt;during what is known as &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;a &lt;/del&gt;TV&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Occurrences where systems draw to much power can be localised to individual dwellings where for example to many pieces of equipment are plugged into the same socket, drawing too much power which can cause damage or in some cases fire. These events can also occur on a wider scale such as for example during what is known as TV &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;pickup, which describes the phenomenon of many people unintentionally demand power at the same time which migth happen during commercial TV breaks when brits all put the kettle on. One example of this occurred at the end of the FIFA World Cup semi-final after a penalty shoot-out between England v West Germany in 1990 when the UK demand at that point was 2800 megawatts.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Common methods exist to deal with power surges, some of which are designing into or recommended by most building regulations such as lightening protection systems which aim to earth any excess power from a lightening bolt safely to the ground rather than through an electrical system. Other practical measures to avoid damage to individual equipment during a power surge that occurs after a power cut ( or during a storm with likely lightening bolts) is to physically unplug equipment from those circuit, thus &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;removin gthe &lt;/del&gt;risk to individual appliances.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Common methods exist to deal with power surges, some of which are designing into or recommended by most building regulations such as lightening protection systems which aim to earth any excess power from a lightening bolt safely to the ground rather than through an electrical system. Other practical measures to avoid damage to individual equipment during a power surge that occurs after a power cut ( or during a storm with likely lightening bolts) is to physically unplug equipment from those circuit, thus &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;removing the &lt;/ins&gt;risk to individual appliances.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244462&amp;oldid=prev</id>
		<title>Editor: Created page with &quot;A power surge is when, for a short period and unusually high voltage occurs in an electrical system or systems. It may also be referred to as a transient surge because it involve...&quot;</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Power_surge&amp;diff=244462&amp;oldid=prev"/>
				<updated>2022-12-11T15:59:08Z</updated>
		
		<summary type="html">&lt;p&gt;Created page with &amp;quot;A power surge is when, for a short period and unusually high voltage occurs in an electrical system or systems. It may also be referred to as a transient surge because it involve...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;A power surge is when, for a short period and unusually high voltage occurs in an electrical system or systems. It may also be referred to as a transient surge because it involves a transient wave of voltage, current or power which usually occurs between the normal waves of voltage. The over voltage can be additive or subtractive with positive or negative polarity lasting less than a half-cycle, or at little as 50 microseconds but surges can reach 6000 Volts and 3000Amps which can cause damage.&lt;br /&gt;
&lt;br /&gt;
Power surges often occur after power cuts or blackouts where a surge in power is likely to occurs as systems are reinstalled or turned on again. Lightening strikes can cause power cuts but can also cause power surges as the systems absorb the excess electrical power of the lightening strike, which can damage equipment plugged into the circuit. Other common causes of power surges are from faulty wiring and when systems are overloaded or drawing too much power.&lt;br /&gt;
&lt;br /&gt;
Occurrences where systems draw to much power can be localised to individual dwellings where for example to many pieces of equipment are plugged into the same socket, drawing too much power which can cause damage or in some cases fire. These events can also occur on a wider scale such as for example happens during what is known as a TV&lt;br /&gt;
&lt;br /&gt;
Common methods exist to deal with power surges, some of which are designing into or recommended by most building regulations such as lightening protection systems which aim to earth any excess power from a lightening bolt safely to the ground rather than through an electrical system. Other practical measures to avoid damage to individual equipment during a power surge that occurs after a power cut ( or during a storm with likely lightening bolts) is to physically unplug equipment from those circuit, thus removin gthe risk to individual appliances.&lt;/div&gt;</summary>
		<author><name>Editor</name></author>	</entry>

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