W
wannabesparky
what would or wouldnt happen if you put a board on a tn-c-s pme system instead of an incoming mains switch? forgive me for sounding thick but im still learning.
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what would happen or wouldnt happen if you put an rcd instead of a mains incoming switch in a board on a tn-c-s pme system?
Well unless you had a fault ie neutral earth on one of the circuits Nothing would happen
At present at least until the 17th in july There has been no need for rcd protection of lighting cookers central heating etc on a tnc-s system because the primary protection the mcb would operate in the required time and no additional protection was required by an rcd, so you would be providing additional protection but would have no discrimination with the circuits One rcd would be protecting the whole of the installation This I consider to be a minor deviation from bs7671 16th ed
The rcd current rating would have to be adequate for the supply fuse though
No danger would be introduced by installing an rcd instead of a main isolator
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