From off, a neon is initially non-conducting below the strike voltage. Once struck, the voltage across it drops to about 30% of the striking voltage. A series resistor limits the current and drops the rest of the voltage.
My comment is based around testing between sockets on different circuits...Can I have some clarification on this please. If we take any Ring circuit, switch it off at the MCB, whip off a socket and have the cables hanging in the air. What would lead to there being continuity across L and N on the same cable?I should mention that if the CU main switch and all MCB are switched off and you test for continuity between sockets on different circuits they will appear to be open circuit between L's and I think I've seen that test in there somewhere. It may not be, but your long post felt a little confusing.
No, I don't think so.Presumably, my socket tester would identify this when testing on the energised circuit?
My comment is based around testing between sockets on different circuits...Can I have some clarification on this please. If we take any Ring circuit, switch it off at the MCB, whip off a socket and have the cables hanging in the air. What would lead to there being continuity across L and N on the same cable?I should mention that if the CU main switch and all MCB are switched off and you test for continuity between sockets on different circuits they will appear to be open circuit between L's and I think I've seen that test in there somewhere. It may not be, but your long post felt a little confusing.
I thought a socket tester would pick up a missing neutral on a socket?No, I don't think so.
Are you talking about the neon light on an FCU?From off, a neon is initially non-conducting below the strike voltage. Once struck, the voltage across it drops to about 30% of the striking voltage. A series resistor limits the current and drops the rest of the voltage.
In the example I talked about, there was still a neutral present at and connected to the socket from the other leg.I thought a socket tester would pick up a missing neutral on a socket?
Applies to any neon indicator light, though the same principle applies to neon display signs etc, though they use an inductive ballast to limit the current rather than a resistor.Are you talking about the neon light on an FCU?
4 pages, 19 days, 21 posts from OP, 33 replies.
And we still don't know what it is you are asking or what the fault is, or what the circuit is, or how many sockets...
The clearest troubleshooting of discontinuity in wires seems to be by unwiring the entire ring and then check from point-to-point. This will eliminate the risk of checking at one socket and what you suspect is the other end of this same cable at another socket. Whilst you may get continuity across L and N (joined together on the same cable) this may be because there is an intermediary socket.
Would you agree with that approach?
Not sure what a neon would do when below strike voltage.
and switched on if it's a switched FCU?
Are there any fundamental disagreements with the understanding I have set out here? Thanks again.
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