Time-delay RCD main switch

TT Systems. Time-delay RCD main switch

22 March 2009

Q Is a time-delayed RCD main switch required in the consumer unit of a new domestic installation supplied by a TT system?   A Provided that the consumer unit is of all insulated construction and all the final circuits are RCD-protected, a time-delayed RCD main switch is not required. How is 0.2s Achieved? A 0.2s [...]

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