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The Voltimum Community is an area to give advice, discuss problems, help your industry peers and offer solutions to those in need. Can you help this Voltimum user with a question about EICR classification?
Question:
I have come across an instance in a new build with the following scenario. How would this be coded on an EICR?
Installation is TN-C-S, 25mm tails from service head into an enclosure with a 100a 100ma time delayed RCD, feeding a 63a MCB. This in turn is the supply from the electrical cabinet outside with a 16mm T/E cable going to the consumer unit in the property.
The T/E looks to be run in the cavity. The consumer unit is a dual RCD 30ma board. I am unable to get the test results for the X5 test on the 30ma RCDs as the 100ma time delay RCD trips first.
I am unable to understand why they have put the 100ma RCD at the front as effectively the main switch on a TN-C-S system. Am I missing something? And how would you code this on an EICR, as I cannot get the times for the 30ma RCDs?
Please comment below if you can help...