3 phase switch

[quinny53]

I am trying to fit two 13a single phase sockets and was wondering is it possible to connect into a 3 phase switch I have which is not used near where I need the sockets rather than running a loop back to the board and installing a new circuit.


Fuse Board --> 3 phase switch (in board) --> 3 phase on/off style switch --> 2.5mm T+E (Live connected into brown phase) / Neutral into blue ---> Socket 1 ----> Socket 2 ---> Loop Back

There is currently and will never be any other load on the 3 phase circuit. Is this allowed?

 

[mikejashley]

Generally its a no no as its not good to leave open phases, also there is no way if individually protecting the single phase circuits as the 3 phase switch is fed from a 3 phase mcb. what you could do is remove two of the phases in the board end (and on the switch end). Run the remaining phase into a single phase mcb and then hook off to your sockets........

 

[quinny53]

Is that allowed because the loop would only from from the single phase in the switch. Or could you wire like this

1p mcb ----> brown phase wire ----> switch ----> twin + earth ---> socket 1 ---> twin+earth ----> socket 2 ----> twin n earth back to switch ----> black phase wire ----> back to 1p mcb in fuse board and sleave the black phase wire brown.

 

[mikejashley]

sorry if i didnt make myself that clear, I was trying to describe what Quinny53 was saying above. Go with it that way, just dont hook off one phase and leave the whole lot running from a 3 phase mcb