- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 05 Jun 2019
Electrical drawings, sometimes referred to as wiring diagrams, are a type of technical drawing that provide visual representation describing electrical systems or circuits. They are used to explain the design to electricians or other workers who will use them to help install or repair electrical systems.
A set of electrical drawings on a project might include:
- A site plan which shows the location of the building and any external wiring.
- Floor plans which show the positions of electrical systems on each floor.
- Wiring diagrams which show the physical connections and layout of electrical circuits.
- Schedules and other information.
- How the electrical wires and other parts of the system are interconnected and switched.
- Where fixtures and other components connect to the system.
- Incoming power lines and their voltage, size, capacity and rating.
- Power transformers and their winding connection and means of grounding.
- The main switches, fused switches and tie breakers.
- Equipment such as batteries, air conditioning, solar panels, generators, and so on, including their voltage and size.
They typically feature complex symbols and annotation to represent and explain components of the system.
 Related articles on Designing Buildings Wiki
Featured articles and news
We have a great range of introductory articles written by ECA.
7 of the most common myths, busted.
Consider a career in the electrotechnical industry.
Exploring local assets of community significance. Book review.
Wood-burning stoves should not be used in thatch-roofed buildings.
Servitisation, smart systems and connectivity.
What happens to the Construction Products Regulation if there is no Brexit deal.
The first step to long-term prosperity.
The status and rights of employees in construction
Continuing to share environmental best practice.
The employee assistance programme EAP.