Fused spur

A fused spur is an electrical supply accessory that incorporates a fuse. This fuse, with a lower rating than the fuse for a ring man, allows an electrical supply using one feed cable to a socket to be taken off a ring main.

Fused spurs are commonly used as an alternative to a conventional socket, for the installation of powerful electrical appliances that can be installed without a plug, such as ovens, washing machines, electric heaters, dishwashers, fridges, and so on. For safety and maintenance purposes, these sorts of appliances may require installation on a separate cable from the ring main.

Switched fused spurs include a manual on/off switch, while unswitched fused spurs do not.

switched fused spur	electrical symbol for switched fused spur

A variation is a double pole fused spur switch which incorporates an extra isolation feature. This makes the switch safer to use as it separates the live and neutral wires.

[edit] Related articles on Designing Buildings Wiki

• Circuit-watt.
• Domestic building services compliance guide.
• Fire risk assessments and historic buildings.
• Glossary of electrical terms.
• Pattress.
• Space classifications for lighting controls.