Panel Pic of the Day

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Jon456

Jon456

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Colorado
Distribution panel in a commercial building.
  • Green insulated EGC is landed on the neutral bus (the grounding bar is laying in the bottom of the panel, still in the manufacturer's packaging). Yes, I checked and it is an EGC, not a neutral with green insulation.
  • Brown insulated wire is marked as a neutral conductor with masking tape.
  • Two gray wires used as neutral conductors without white tape markings.
  • Two open knockouts in the panel without plugs.

I don't believe this is an NEC violation, but I like to put insulated bushings on the ends of all threaded fittings entering a panel or box. Also, the handle is broken off the #1 breaker. That's not the fault of the installer, but it should have been replaced when it was damaged.

20190620_171503.jpg20190620_171648.jpg
 
LarryFine said:
The neutral appears to be bonded. I see no EGC; is the feeder metal or PVC?
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I didn't dig into it enough yet to check if the neutral was bonded to the panel. I just opened it to take a look and get some pictures. That said, my understanding of NEC 250.24(A)(5) is that the neutral bus in this panel should not be bonded because it is a metered subpanel serving a tenant space inside a multi-tenant commercial building (i.e., it is not a service entrance panel).

I have not yet laid eyes on the main service panel, but I'm 99% certain it's in the same wing of this building as this subpanel. So grounding electrode should not be required.

There is one feeder conduit coming into the panel from the disconnect, and two branch circuit conduits leaving the panel. All the conduits are EMT. There is only one EGC in the system: that single green insulated 12 AWG conductor in one of the branch circuit conduits.
 
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I was looking at the screw to the left of the neutral lug, in the close-up, but I see a second one behind the neutral conductor, so it's a mounting screw. The empty hole must be where a bonding screw would have been.
 
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