3 Phase meter cable identifying
- Thread starter benny123
- Start date
Have you photo to upload?
And you are authorised by the DNO/supplier to break the seals and work on meter terminals and/or remove the cut-out fuse?
Appropriate staff are trained to deal with this so leave it up to them!
A bit like electricians telling DIY folk to get a qualified electrician, if you ain't trained on metering you become the DIY person!
Appropriate staff are trained to deal with this so leave it up to them!
A bit like electricians telling DIY folk to get a qualified electrician, if you ain't trained on metering you become the DIY person!
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I had a phase rotation meter which I thought was very handy and when I was sent to fit a socket for a saw I ensured everything in correct direction. However it transpired rest of the site was not correct.
In real terms does not matter if you call wire 1 brown, black or grey all that matters is phase direction and as I found out often it's wrong anyway.
In real terms does not matter if you call wire 1 brown, black or grey all that matters is phase direction and as I found out often it's wrong anyway.
Westie, if the meter has been disconnected by the supplier (we assume it is not private metering), then if the tails are unmarked, it would be upto the sparky or owner to mark the tails ready for the meter operator to connect. A meter operator will not identify the tails, they would walk off site.
The tails could be identified by observation, or beeping out.
The tails could be identified by observation, or beeping out.
Getting the neutral wrong would cause issues though!
I installed a TP socket once, and the phase rotation meter we had then showed it to be correct. Unfortunately the DB I had connected to was submained off several others, and along the way (I guess to balance loads), one submain had two phases connected to one phase in busbar chamber. While my rotation meter did spin, the refrigerated lorry plugged in just hummed!
If it's live, one can surely ascertain which is neutral with a voltmeter?
Bang?! I think I must be misunderstanding you!
Kind Regards, John
I guess what he means is that rather than the outgoing cable from the busbar chamber being connected with one phase conductor connected to each phase busbar two of the phase conductors in the outgoing cable were connected to the same phase busbar.
In this situation single phase loads would work fine but three phase loads would obviously not and there may also be problems with overloaded neutrals.
In this situation single phase loads would work fine but three phase loads would obviously not and there may also be problems with overloaded neutrals.
It is quite common to have L1, L3, L2 rotation in these parts, I think it just depended on what side of the bed the DNO man (Westie
) got out of!You could if you like, then apply heat shrink to the outside of them or apply lettering to say which one is which.
Or as they are disconnected replace them with proper colours.
As I've commented before, my three phases are (and clearly have been for decades) identified, both at DNO fuses and meter, as 'A', 'B' and 'C' - which gets some folks a little confused!It is quite common to have L1, L3, L2 rotation in these parts, I think it just depended on what side of the bed the DNO man (Westie
Kind Regards, John
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