ECN Forum Forums Photo Discussion Forums Violation Photo Forum C.T. Cabinet Shorted

Alan,
I'm not sure I understand. One end of the conductor is bonded to the cabinet and the other end goes to the ground rod? Where is it bonded to the neutral? What is the fault current path?

I'm with eprice.

Soooo...., how is the fault current going to ground? Where is the bonding to the neutral? If it's in another feeder panel before the the CT panel well then, O.K. maybe but....?

I'm missing something here aren't I?

The grounding electrode conductor can be bonded to the neutral in the panel.

Here in So CA, The GEC is not permitted to even pass through a utility CT cabinet, nor be bonded there.

Grounding / bonding conductor starts at the service disconnect, goes to the CT (bond) then continues to the ground rod. (grounding)
CT cabinets must be bonded per 250.66 if the conduits are non metalic.
Conductors are frequently paralleled to make it easier to pull. 1,500 KcMil (625 A) or 2x 350 KcMil (2x310A=620A) or 4x 1/0 (4x150A=600A) And to Save Money, and our natural resources.
For a 600 amp service the conductors listed above will all handle the load. Using seperate conduits runs where needed to avoid derating four runs of 1/0 will be a lot less expensive than one run of 1,500 KcMil if you can even find it. Then try to install it.
Alan--

Utility requirement or not. There is no way that would pass in this jurisdiction. The lugs would as a bare minimum have to be mounted on insulated standoffs. I would never let a live lug be attached to wood directly. Wood is not an insulator, at best a semi conductor. I once touched a HV transformer from an electrostatic air cleaner with a neon volt checker taped on to a long broom handle and I found out the hard way what a lousy insulator wood and the case for that neon are.