How is this possible? You're saying that the metal CT enclosure is unbonded and floating so that a fault to the metal cabinet will leave it energized?
Sounds dangerous.
The 400 amp, 3 phase meter bases GA power gives us are pretty much "pre packaged" CTs with terminals for wires and place to plug the meter in. No current from the loads goes through the meter though.
My point here is that the neutral, or grounded, terminals in these cans are fixed directly to the meter can. There is no insulator. They are relying on that piece of equipment to be bonded to their grounded conductor in the event of a fault. Its a little strange because when you install the supply side bonding jumper you are effectively bonding the ground and neutral in the meter can and the disconnect. But we know this is not the correct. That should be done only in the disconnect.
I have come across a few inspectors who scratch their head at this one.
A CT cabinet is a little different because the are no terminations made. Wires are just passing through it just like a pullbox or wire way. But its on the supply side.
The first paragraph in 250.2 is "bonding jumper, supply side" that definition is "a conductor installed on the supply side... ensures conductivity between metal parts required to be electrically connected"
If it were my job, I'd have that jumper installed and move on.
If you are using metallic conduit, then you can use a bond bushing. If its in plastic, i would bolt a lug to the CT cabinet.
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