3 core + Earth
- Thread starter maltaron
- Start date
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generally if the circuit is protected at 5/6 amp.
S
sparkyspike
Ok for what?
to provide two-way switching, at least that's what i thought he meant.
DO NOT use for 3 phase 400 v.
DO NOT use for 3 phase 400 v.
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Why?
can you use it to feed a 3 phase machine or something then? didn't think it was tough enough. having said that you get 3 phase flex. i'd be grateful for any advice on this rf and anyone else.
it depends entirely on the rating of the machine..
It also depends on the external influences. In my experience this would be more 'no' than 'yes'.
yes it's more external influences that would concern me.
not for a flexible link to a machine itself, but a feed from the CU to a 3 phase switch or small socket it's viable..
S
sparkyspike
Use the same size cable as the rest of the circuit.
Somebody will come along and say that that may not be necessary for a switchline. But 3 core cable sometimes carries a neutral or permanent live and in any case, use the same size cable as the rest of the circuit.
Surely as long as the cable is OK for the MCB rating it doesn't matter if it's not the same as used in other parts of the circuit?
H
holmslaw
..
True.
But this person who has increased a lighting MCB to an unconventional size without checking the cables might also not realise that some of them are IM 103, and therefore even 1.5mm² could not go on a 16A breaker.
And all done in sizes which assume the worst-possible derating case, just in case an idiot should ever want to fiddle with them.
Good luck with your 6mm² ring finals.
Oh hang on - I'd forgotten that some of them are bunched together where they run up through thick insulation between two floors - better make that ring final 16mm²....
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