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RCD configuration
I've read that current practice is to use several RCDs in a domestic
installation. A time delayed 100mA RCD to protect the whole installation and 30mA RCDs for sockets, outside wiring etc. My question is why can't the main RCD be set at a safer 30mA sensitivity since it's time delay should prevent it from tripping before any other ones? Also if you install a garage unit with a 30mA RCD on an installation which is protected by another 30mA RCD at the CU, which one trips if an earth fault occurs? |
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