Street light joint problems?

[Bradley6969]

Hi looking for some advice
Guy at work has been jointing existing street light feeds to be fed from another position, now he’s connected at the street lights the same within the joint he’s used brown as line, black as earth, grey as neutral now he’s been back to test they all work but none have come on, each street light has its own RCBO, now I’m thinking that they must have used black as neutral and grey as earth as I noticed it on the same job but on another part of the site ,now wouldn’t they trip once the photocell has activated? He hasn’t been back to check cut outs as he went back to test up.
Thanks

 

[buzzlightyear]

if he has put the line /brown gray /neutral green /black and you saying
now I’m thinking that they must have used black as neutral and grey as earth get him back and ask him what he playing with.

 

[Bradley6969]

if he has put the line /brown gray /neutral green /black and you saying
now I’m thinking that they must have used black as neutral and grey as earth get him back and ask him what he playing with.

I just want to know what will happen I now there’s reverse polarity at either end now but wouldn’t RCBO trip or light just not come on

 

[James]

As long as the rcbo has equal current on the live and neutral as seen by the device.
It will not trip.

 

[Bradley6969]

As long as the rcbo has equal current on the live and neutral as seen by the device.
It will not trip.

So when photocell switches light doesn’t come on but RCBO won’t trip cause it’s equal? Just trying t get my head round it

 

[goasis]

No testing done then? Polarity should have been checked at the dead testing stage

 

[Chivers]

Surely If the Earth and Neutral are reversed then the RCBO will trip immediately the power switches via the photocell as effectively only current flowing in the Line and Not back through the Neutral so there would be an imbalance straight away. Does anyone do a Cert? Recording R1+R2 values? I agree with goasis

 

[Bradley6969]

I thought this too apparently not, and he went one day to connect didn’t test and was going back again to test everything
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I would have thought once photocell activates then the RCBO would trip as there’s no load on it until then

 

[MJPD29]

If the joint is buried already and he didn't carry out proper testing then it's his problem. Could be quite a big one too.

 

[Pete999]

If the joint is buried already and he didn't carry out proper testing then it's his problem. Could be quite a big one too.

For the OP what sort of U/G joint and cable did this Bloke use? plastic bag and flex or the proper U/G equipment?