On 01/03/2020 13:37, AnthonyL wrote:
So in the coffee bar this morning chat pondered on 3-phase and how to
know which of the 3 wires was which phase. I've done some googling
and would like the experts to confirm:

1. It doesn't matter which wire is which phase providing the sequence
of 1-2-3 2-3-1 or 3-1-2 is maintained when connecting, or any pair
swapped if that is what is required.

2. The voltage between any two phases is 440v and it doesn't matter
which two

400v +10% - 6%

and

3. The voltage between any phase and ground/neutral is 240v

230v +10% -6%.

Are there any conditions when the phase needs to be known? If so how
is it detected?


--
Colin Bignell