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Safe Disconnection to Undertake Work.

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Scene. An old farm building now used as a double glazing frame maker's workshop.


The supply comes from an old shed about 40 metres away, where the meter is. The old shed has some 70s/80s rusty M.E.M. isolators that feed several S.W.A. cables that exist the shed in many directions underground. I suspect that one feeds the main farmhouse, another a rented cottage and the others various farm buildings. There is no clear labelling of the isolators.


What is the best way to locate the frame maker's  building supply where I have to work?


Somewhere I have a circuit i/d set, if I can find it, but that will need access to the live parts and I do not wish to turn off the wrong isolator.


Z.


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  • 0
    I should have said that the cables are all in rusty metal trunking and pretty much inaccessible. I do not want to turn off trial and error style as I may cause problems for other people and the farm. I can not put a clamp meter on individual tails safely. To gain access to the supply cables I would have to turn off the M.E.M. isolators to get the doors open (interlocked).


    The supply I am working on is for three phase machines and I can not operate them as I am on my own tomorrow and am not familiar with them. The frame maker's building has a separate single phase supply to the three phase one that I am working on.


    Z..
Reply
  • 0
    I should have said that the cables are all in rusty metal trunking and pretty much inaccessible. I do not want to turn off trial and error style as I may cause problems for other people and the farm. I can not put a clamp meter on individual tails safely. To gain access to the supply cables I would have to turn off the M.E.M. isolators to get the doors open (interlocked).


    The supply I am working on is for three phase machines and I can not operate them as I am on my own tomorrow and am not familiar with them. The frame maker's building has a separate single phase supply to the three phase one that I am working on.


    Z..
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