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  1. S

    1 Earth for 2 supplies

    i reckon its tns myself but we shall see...... ze is only 0.03 but then again the transformer is only 15 metres across the car park! got in contact with the DNO who 'dont hold' records, when i reminded them they had to tell me the information i require under section 28 of ESQCR regs (i think...
  2. S

    1 Earth for 2 supplies

    the substation supplies other installations too, of that im sure, there are a couple of other factorys on the street and a couple of houses. there are no other cables coming up out of the floor. the setup as i said is swa-------meter panel---------switchfuse. this is the same for both...
  3. S

    1 Earth for 2 supplies

    Hi, Ive come across an installation that doesnt seem quite right, ill get my red bible out later and have a look what i can find but hopefully someone on here may offer an opinion. Ill try and be as clear as possible. I realise its not a DIY question but maybe someone on here has come across a...
  4. S

    security lighting and zs query

    Got to put up some outside security lights at the factory where i do some maintenance. Im fine with circuit design, volt drop, ccc ect, but am just after some advice as to the best fittings to use as ive never put any up before. the lights will be mounted 20ft up and im after the photocell...
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