As is now all but a few exceptions, circuits must be protected by the ubiquitus RCD, does that mean an rcd can be used as an incomer or do we have to have a main switch an rcd mcb,s another rcd and then the rest of the circuits.
rcd incomer
- Thread starter maguire
- Start date
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It has to be set up such that one RCD tripping does not take out an inordinate number of circuits, so a single RCD incomer is not going to comply. The reasoning behind this is that if (to take a random example) your dishwasher develops a leak and trips the RCD, you don't want all the lights in the house going out, or you've got a very good chance of injuring yourself trying to get to the CU to reset it!)
The 'best' solution is RCBOs for each circuit, however as this is quite expensive the 'accepted' solution for a domestic property is to have two RCDs, and ensure that e.g. downstairs lights are on one, and upstairs on another etc.
The 'best' solution is RCBOs for each circuit, however as this is quite expensive the 'accepted' solution for a domestic property is to have two RCDs, and ensure that e.g. downstairs lights are on one, and upstairs on another etc.
No you cannot do this - it does , and always has, contravened BS7671
That is the cost compromise that is being installed. It is technically flawed, but then so was the old split load CU.
Per the above, the best solution is RCBOs for each circuit.
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