I have bought a Volex 12 way split CU with a 100A DP main switch and 63A 30mA RCD (in error!) as I now understand all circuits will need RCD protection. I am yet to prove Volex offer an RCD Incomer that will provide discrimination for the existing CU RCD and the Garage RCD (Either by trip current or time delay) Where the hell is the Volex web site???
If they do .... I am assuming the answer is to buy a 80A 'slow to operate' Incomer to replace the DP switch. If they don't what should I do?
a) Thow the Volex CU away and start again
b) Install an 80A / 100mA RCD in a separate plastic enclosure between the Meter and the CU.
The overall Earth impedence is 15 ohms (The spike on its own is 140 ohms)
If they do .... I am assuming the answer is to buy a 80A 'slow to operate' Incomer to replace the DP switch. If they don't what should I do?
a) Thow the Volex CU away and start again
b) Install an 80A / 100mA RCD in a separate plastic enclosure between the Meter and the CU.
The overall Earth impedence is 15 ohms (The spike on its own is 140 ohms)