Wiring installation codes and regulations are intended to protect people and property from electrical shock and fire … See more

In a typical electrical code, some colour-coding of wires is mandatory. Many local rules and exceptions exist per country, state, or region. Older installations vary in colour codes, and colours may fade with insulation e… See more

Materials for wiring interior electrical systems in buildings vary depending on:
• Intended use and amount of power demand on the circuit
• Type of occupancy and size of the building… See more

Modern non-metallic sheathed cables, such as (US and Canadian) Types NMB and NMC, consist of two to four wires covered with thermoplastic insulation, plus a wire for Protective Earthing/Grounding (bonding), surrounde… See more

Insulated wires may be run in one of several forms between electrical devices. This may be a specialised bendable pipe, called a conduit, or one of several varieties of metal (rigid steel or aluminium) or non-metallic (… See more

For very high currents in electrical apparatus, and for high currents distributed through a building, bus bars can be used. (The term "bus" is a contraction of the Latin omnibus – meaning "for all".) Each live ("hot") cond… See more