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The obvious thing would be a non rcd garage board, why anyone thinks lashing in another board to be a good idea is quite frankly beyond me.Nothing stopping you going- meter-isolator-henley block
Discuss Garage Board - achieving discrimination? in the UK Electrical Forum area at ElectriciansForums.net
The obvious thing would be a non rcd garage board, why anyone thinks lashing in another board to be a good idea is quite frankly beyond me.Nothing stopping you going- meter-isolator-henley block
The obvious thing would be a non rcd garage board, why anyone thinks lashing in another board to be a good idea is quite frankly beyond me.
And by having an rcd in the garage would prevent this?
I see your point and it would have been better to fit a high integrity board with the garage on a separate rcbo, if required.That's what I'd do....but I can see that if you want to cover every eventuality then avoidance of the garage affecting any of the house circuits might seem a good idea. If there was a load of garden lighting for example on the circuit then you'd defo want to keep it away from the house RCD, but as the OP states a garage used for storage then I'd be quite happy to use the house DB RCD for any required additional protection.
That's what I'd do....but I can see that if you want to cover every eventuality then avoidance of the garage affecting any of the house circuits might seem a good idea. If there was a load of garden lighting for example on the circuit then you'd defo want to keep it away from the house RCD, but as the OP states a garage used for storage then I'd be quite happy to use the house DB RCD for any required additional protection.
I was under the impression that rcds needed to be at the origin of the installation, and in the case of a sub-main in my case the garage board being the origin? Therefore tripping can be resolved in the garage.
That would be one way or use any cable but install to a method which doesn't need additional rcd protection.Thanks for the input all. The simple solution seems to be swap out the rcd in the garage board for a main switch.
However for clarity am I correct in saying the ideal setup for a sub-main in the garage for this system would be:
High intergrity board, swa wired directly to breaker in cu, rcd protection fitted in garage board?
Sorry I edited my post during your reply - would appreciate your feedback on my revisions pal?That would be one way or use any cable but install to a method which doesn't need additional rcd protection.
Hi - you may find that both RCDs trip during testing, showing the inconvenience of this set up. Do all the testing and hopefully all will be well. Except ... when both of the RCDs trip, which one was it that the tester recorded ?... I'll be testing tomorrow, so if the garage rcd trips first should I change the current setup? ...
Hi - you may find that both RCDs trip during testing, showing the inconvenience of this set up. Do all the testing and hopefully all will be well. Except ... when both of the RCDs trip, which one was it that the tester recorded ?
Not sure that I'd agree. It depends on the individual tripping times of the devices, so could be either (or both).When you have 2 RCD's in series, of the same value, its normally the one in the main house that will trip first...
Edited:
Thanks for the input all. The general advice seems to be swap out the rcd in the garage board for a main switch - but all this is doing is removing the two rcd's in series which means if the garage trips, we loose circuits on same side in the house - which is what I was trying to avoid by using an rcd protected garage board.
What is the benefit of removing swapping out the rcd in the garage board for a main switch. Is there anything dangerous about two rcds in series. I'll be testing tomorrow, so if the garage rcd trips first should I change the current setup?
For clarity am I correct in saying the ideal setup for a sub-main in the garage for this system would be:
High intergrity board, swa wired directly to breaker in cu, rcd protection fitted in garage board?
Not sure that I'd agree. It depends on the individual tripping times of the devices, so could be either (or both).
Reply to Garage Board - achieving discrimination? in the UK Electrical Forum area at ElectriciansForums.net
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