Rcd protection

[dal_87]

Hi wondering if some1 can advise me on a job I have been doin I've run a 10mm swa 3core to a outer building office mostly buried into a consumer unit protected by a rcd . At the house end consumer is it best to terminate in rcd side of board? or general supply side ?... Because if I terminate in rcd side if a fault was to occur in outer building it would interfere with power in house or do I place a separate rcd next to house consumer ?

 

[telectrix]

the SWA does not require RCD protection. RCD is best fitted at the outside building. the only time you need RCD at the front end is if there's T/E buried in walls in the house before joining to SWA.

 

[dal_87]

Thanks no nothing buried at house end just exits board into plastic adaptable box then swa out to outer office which is 30m away

 

[telectrix]

then feed from a non-RCD way in the house CU. fit RCD/s in office.

 

[Engineer54]

Why do you want to create a situation where you would not have any discrimination between the two RCD's?? Supply the outbuildings SWA cable from the unprotected side of the main consumer unit!!!

 

[MDJ]

If you want to use RCDs use a time delay on the supply end, that said, why?