Leo peered at the interlocking switches. "So, if the power fails, the change-over switch physically disconnects the building from the street before the generator even kicks in?"
: Detailed guidance on earthing (grounding) arrangements and the use of residual current devices (RCDs) to prevent electric shock. Practical Applications Iec 60364-5-551 | PDF - Scribd iec 60364 part 551 pdf
: Forms the basis for national standards like BS 7671 in the UK. Iec 60364-5-551 | PDF - Scribd Leo peered at the interlocking switches