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  1. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    That 300amp main switch is fed from a substation other end of the warehouse
  2. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    Looks like there 300amp
  3. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

  4. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

  5. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    Does the dist- board need an isolator before it?
  6. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    Sorry yes it does
  7. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    No.its a CED SD 100
  8. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    My boss is telling me the dist- board needs an isolator before it incase someone wants to work on the board they don't need to kill the busbar
  9. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    Boss has told me to use 35mm tails into isolator then 35 mm tails to feed the dist board and to use the 125amp switch disconnector.
  10. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    Why
  11. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    If I replace the main switch which is a SE 125SW3L switch disconnector with a 125 a Mccb I can come straight of the bus bar to the dist board? lol
  12. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    SE48B250 KQ16 TP WAY 250 type B DIST THX
  13. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    I told him first day on the job, but he was the one who designed it and ordered bits
  14. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    Will check in the morning
  15. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    Maybe he couldn't get a 100amp dist-board hence why he got the isolator?but then the cost in price is a huge difference?But he had said to use 25mm tails.il have to run through the design with him tomorrow,thx for the advise really appreciate it. I only started new job last week so had to make...
  16. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    If the fuses are 100amp can I feed the dist board directly with 35 mm tails thx
  17. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    Yes I'm thinking now it's 100amp sorry
  18. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    So downrate the the dist- board switch to 125. Amp? If he's adamant about not changing the isolator or dist- board all I need to do is feed the isolator with 35 mm tails which feeds the dist- board with 35 mm tails which don't route through the bus bar chamber as long as the fuses feeding the...
  19. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    No
  20. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    If the isolator feeding the busbar has 100amp fuses in could I then feed the dist board directly with 35 mm tails and downrate the dist-board switch to a 100amp mccb. If my boss is adamant about using the isolator I will still need to use 35 mm tails anyway is that right ? Thx for advise

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