sub-main

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  1. B

    Earth bonding via sub-main??

    Hi De Hi, I'm pricing for a small kitchen extension. The owner of the property has run a 10mm^ 3core SWA around the outside of the building from the garage to supply a new C/U in the kitchen. All well so far. The problem is that the Main Water and Gas has not been bonded to the MET! The...
  2. J

    16mm T&E sub-main question

    I have been asked to price for a db change in a flat above a veterinary centre that the nurses on call stay in. The supply to the whole building is a TN-S 2 phase. It has a 16mm main earth conductor, 25mm tails and 10mm's to services. The flat above is supplied with a piece of 16mm T&E on a...
  3. S

    Would you run a sub-main..

    The unit we are working at, has a 3phase proteus (yuk!) DB at the front of the unit. The unit is approx 33mtrs long by approx20mtrs wide. The guy who has asked me to help him out on the job has agreed to run power lights etc circuits to various areas. Now the sockets they have marked out...
  4. A

    Doing my first sub-main in SWA.

    I'm just about to wire a sub-main from an entrance hall into a flat, about 4-5 metres away. I guess it'll have to be in 25mm which in SWA is going to be like a broomstick? As it's my first crack at it, how difficult is the termination going to be at both ends and are there any particular...
    • ash2020
    • Thread
    • doing electricians' talk first sub-main swa
    • Replies: 33
    • Forum: Talk Electrician Forum

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