main switch | Page 10

main switch

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  1. H

    Main switch

    looking at changing a CU, next to the one i am changing there is a 2nd CU via a timeswitch for storage heaters, so at the minute there are 2 main switches - is this allowed? can i just change the CU and ignor the second one?
  2. O

    BS Number for wylex main switch

    Hello people.Can anyone tell me the BS number for a wylex main isolating switch please.Is it 60669-2-4 or 60947-3? Many thanks
  3. N

    Main Switch question!

    New to the trade and lots to learn! So I've filled in my very first installation certificate - but what is the Type BS(EN) of the main switch on this BS3036 semi-enclosed fuses consumer unit? It's 250V, 80A but no more markings - is it relevant for this old board? Also why does my tester not...
  4. M

    800amp main switch

    hi,folks i need some help i have a 800amp main incomming over current switch with a bolt on earth leakage current relay,that seem to be tripping in bad weather ie when lightning is around,the site has 12 other sub boards none of which have the same device. my question is does anyone else think...
  5. D

    Main Switch on Certificates

    Have already asked this, but now have a conflict in opinion which I will explain. Just done my first job, which was 8 flats in a large house. 1361 type II main fuse 100A. Suppliers switch then 25mm tails to a 60947, fused down to 80A with Switch, then 16mm T&E with an additional 10mm cpc to...
  6. L

    Main switch BS numbers

    Hi Chaps anybody knowledgeable on BS numbers for main switches on domestic CUs? L
  7. sparks1234

    Main switch

    Interested in your opinion, I have always been under the impression that an installation should have a main switch, one switch turns everything off, years ago you just tapped off the Henly block, what do other people do if the original consumer unit is full?
  8. M

    bs number for main switch

    hi i am looking for the bs number for a eaton 100a tp incomer switch (main switch on a b type eaton board ) for my test sheet i could not see it on the main switch
  9. J

    what size rated RCD to use as main switch

    the whole C/U is covered by the RCD, what size RCD should be used? thanks

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