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    bonding jumper

    whats would be the service bonding jumpers for 6 parallel runs of 600mcm for a 2500a service Is it 1/0 copper from table for 600mcm? I will have a pull box between the CT can and switchboard> would i need to install bonding bushings inside the pull box or only as it enters MDP
    Last edited by mannyb; 07-14-19, 05:55 PM.

    #2
    For SEC's you can size the bonding jumper for each separate raceway based on the conductors within each raceway according to T250.102(C). {250.102(C)(2)}
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

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      #3
      Originally posted by infinity View Post
      For SEC's you can size the bonding jumper for each separate raceway based on the conductors within each raceway according to T250.102(C). {250.102(C)(2)}
      would I need to install SBJ at Pull box and MDP for each conduit or just MDP?

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        #4
        Originally posted by mannyb View Post
        would I need to install SBJ at Pull box and MDP for each conduit or just MDP?
        For raceways with SEC's within them you only need to bond them at one end with a method beyond a standard locknut. Personally (unless required by spec) if those are full size KO's I would use a bonding locknut and forget the wire type jumpers.
        Rob

        Moderator

        All responses based on the 2014 NEC unless otherwise noted

        Comment


          #5
          If for some reason you do elect to bond individual conduits by a jumper you can do so with a 1/0 to each.
          If you use one jumper for all or you are bond ingany pull box/cabinet by means of a jumper you would need to size it at 12-1/2% of the sum of the conductor kcmil (6 X 600000 X .125 = 450,000 = 500 kcmil)
          At my age, I'm accustomed to restaurants asking me to pay in advance, but now my bank has started sending me their calendar one month at a time.

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