SCOL1
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I have a question about TT systems, i have just done a rewire on a bungalow, and have installed an earth rod, all readings are good, have installed a high integrity 17th edition board, single rcbo for smoke alarms then split 30ma dual rcd for rest of bungalow, i think that is all you need to do, am i right to say that due to every circuit being protected by 30ma rcd i do not need to oversee the main incomer on a 100ma time delay.
Replies appreciated.
You are right,if you were installing a metaclad board then you would have to install an RCD on tails to board.As you are using a high integrity board then you dont need to as you already have 30ma protection on all circs.