Power Supply - 3 Phase 400V
As per BS 7671, is it acceptable to use 4 cores (Br Bl Gy & Yellow) 300/500V cable be used for 3-phase motors?
What is the recommended voltage rating of power cables for three-phase motors?
Thanking you in advance.
Power Supply - 3 Phase 400V
As per BS 7671, is it acceptable to use 4 cores (Br Bl Gy & Yellow) 300/500V cable be used for 3-phase motors?
What is the recommended voltage rating of power cables for three-phase motors?
Thanking you in advance.
Nobody else has mentioned the use of the green & yellow core as a phase conductor.
I hadn't seen that suggestion - I thought the OP was suggesting Brown/Black/Grey for the lines, and (Green/)Yellow for PE - balanced loads like motors often don't need a N.
Re-using a G/Y core in a multicore cable as a live conductor isn't actually prohibited these days (likewise using a "line" coloured core as PE - which carries the same risks, if at the opposite end) - usually the problem is consequential the lack of a c.p.c. which is usually mandatory even when supplying double insulated equipment. For SWA however the armour could be used.
- Andy.
Nobody else has mentioned the use of the green & yellow core as a phase conductor.
I hadn't seen that suggestion - I thought the OP was suggesting Brown/Black/Grey for the lines, and (Green/)Yellow for PE - balanced loads like motors often don't need a N.
Re-using a G/Y core in a multicore cable as a live conductor isn't actually prohibited these days (likewise using a "line" coloured core as PE - which carries the same risks, if at the opposite end) - usually the problem is consequential the lack of a c.p.c. which is usually mandatory even when supplying double insulated equipment. For SWA however the armour could be used.
- Andy.
Oops. I misread the original post! I read it as brown, blue and green+yellow.
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