Hi, first post here. I was thinking of sitting 2391, so I have been reading through Section 7 of Guidance Note 3, which roughly corresponds to Section 612 in BS 7671. I was trying to make some sense of the tests to see how logical it was.
What I don't seem to be able to find, is any case of a measurement of continuity of a neutral in a radial circuit.
The resistance of all three conductors is measured in the case of a ring final circuit, but in the case of a radial the neutral never seems to get measured. The only possible place relates to volt drop, but this is a fairly vaguely specified requirement.
It seems strange that the regulations would be suggesting that the way to know that a neutral in say a lighting circuit is checked by 'seeing if the lights work'. As a badly made high resistance connection could be missed, and potentially cause a fire.
Even in the case of a ring final, the neutral resistance is not actually recorded.
Doesn't it make a mockery of forcing people to buy and use expensive equipment, when bad connections in a neutral are not even checked by the procedure?
What is the value of a set of regulations, worked on by standards organisations all over the world, taught to people doing C&G 2391, resulting in a report which is given to customers to prove to them they are safe, which describes a mandatory procedure but forgets to include a basic measurement?
(Rant over! )
What I don't seem to be able to find, is any case of a measurement of continuity of a neutral in a radial circuit.
The resistance of all three conductors is measured in the case of a ring final circuit, but in the case of a radial the neutral never seems to get measured. The only possible place relates to volt drop, but this is a fairly vaguely specified requirement.
It seems strange that the regulations would be suggesting that the way to know that a neutral in say a lighting circuit is checked by 'seeing if the lights work'. As a badly made high resistance connection could be missed, and potentially cause a fire.
Even in the case of a ring final, the neutral resistance is not actually recorded.
Doesn't it make a mockery of forcing people to buy and use expensive equipment, when bad connections in a neutral are not even checked by the procedure?
What is the value of a set of regulations, worked on by standards organisations all over the world, taught to people doing C&G 2391, resulting in a report which is given to customers to prove to them they are safe, which describes a mandatory procedure but forgets to include a basic measurement?
(Rant over! )