Also what are the ZS values for 110V circuits I can’t find it in the regs?
It says 5s disconnection times for the 55v centre tapped would it still be the same for 110v if I doubles the ZS values say a type b 10 amp is 1.05 ohms so 2.10 ohms I for a 110v to earth?
As the voltage rises the chance of surviving a shock fall, so the exposure time has to be reduced - so we need the fault current to rise and the fault duration to fall.
MrJack96:
there is a DB board fed from a centre tapped transformer only on single pole breakers. The board feeds instrumentation. Is there any issue changing it to 110v and tie the neutral to earth there is no socket outlets fed on this so can’t see it as an issue?
How can you tie the neutral to earth?
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