Residual Current Devices (RCDs) are used extensively in modern electrical installations. However, the older type AC RCDs are now almost obsolete within the latest version of the UK wiring regulations BS7671. In this electrician's Q&A, Joe Robinson explains how RCDs work and why the Type AC is on the way out.
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🕐 TIME STAMPS 🕕
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00:00 RCD changes under BS7671
00:33 Types of RCDs
00:52 How does an RCD work?
01:30 Line and neutral currents
01:51 Earth fault
02:27 Loads with DC elements
02:40 AC sine wave
03:26 Magnetised core
04:45 Can I still use an AC RCD?
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