the-Regs : BS7671 18th Edition Online Training
BS 7671: 18th Edition Wiring Regulations – Study when you want and pass your exam when you're ready…
Looped Lighting Circuits – Electrical Installation 101. The most common method is the ‘loop in’ system. This is where cables loop in and out of each lighting point, which is usually a ceiling rose. The wiring may be a Twin and Earth PVC/PVC cable consisting of a Line, Neutral and CPC (in), a Line, Neutral … Read more
A.C. current flowing in a conductor creates an alternating magnetic field. This is made stronger if the conductor is surrounded by a ferrous ‘containing iron’ enclosure such as with steel wire armour ‘SWA’ or steel conduit and also if a single conductor enters a ferrous enclosure on its own. This electromagnetic effect produces heat which … Read more