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tortuga said:
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Murr72 does this depict what you have in the service disconnect?
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I hope you are just asking the OP if that's what he has and not thinking that your descriptions are correct.
The GEC is not the MBJ, the neutral is not floating as the bar is mounted directly to the disconnect enclosure. Since the conduit, in this case, is the EGC, and it connects directly to the enclosure.
 
tortuga said:
The whole concept of having the MBJ start in the meter then hit the bond bushing in the service can got me looking in the code for where the MBJ has to be 100% in the service disconnect. And its 250.24:

Also keep in mind this is Chicago and everything would be EMT so probably no wire type EGC's.
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Yes there must be a MBJ in the service disconnect.

Everything on supply side is containing service conductors and you still bond raceways, enclosures, etc. to the grounded service conductor, there is no EGC until after you leave the service disconnect.

The GEC is permitted to be landed ahead of the service disconnect. Whether or not it can pass through the service disconnect on the way there without connection IDK. I myself would avoid doing that and just land in the service disconnect if already in there with it. For one thing it creates parallel path on the grounded conductor - though technically so does a metal raceway between meter and service disconnect.

OP apparently has bad neutral and if it is metal raceway between meter and panel that is either bad conductivity or the bad neutral is further upstream.
 
Little Bill said:
I hope you are just asking the OP if that's what he has
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Yes I am trying to clarify the above OP statements from post #1:
I would find it hard to believe that someone would remove the bonding screw from a disconnect.
I am wondering if on closer examination he will find one.

I suspect the OP has lost the ECG between the service panel and the subpanel.
 
The only fused disconnect I've seen with neutral kits required the bonding jumper be installed in the field. The bare conductor bonded as shown in post 61 would work, even if incorrect. All meter sockets, I've worked with, have the neutral secured to the can. Are Cook County sockets different?
Is SE cable allowed there?
 
ptonsparky said:
All meter sockets, I've worked with, have the neutral secured to the can. Are Cook County sockets different?
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No, not that I'm aware of. The municipalities in Cook and surrounding counties have their own ammendments and selected version of the NEC. In the Chicago Electrical Code, 250.80 requiring metal enclosures for service conductors and equipment to be connected to the grounded system conductor was lifted verbatum from the NEC. (Chicago code is based on the 2017 NEC with ammendments)


ptonsparky said:
Is SE cable allowed there?
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In Chicago it is limited to existing residential occupancies of at most 3 units:
Chicago_elec_code_230.43.png

Chicago_elec_code_338.10.png
 
synchro said:
No, not that I'm aware of. The municipalities in Cook and surrounding counties have their own ammendments and selected version of the NEC. In the Chicago Electrical Code, 250.80 requiring metal enclosures for service conductors and equipment to be connected to the grounded system conductor was lifted verbatum from the NEC. (Chicago code is based on the 2017 NEC with ammendments)



In Chicago it is limited to existing residential occupancies of at most 3 units:
View attachment 2558882

View attachment 2558883
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Out of curiosity, how many dwellings have busways, cablebus or MI cable installed?
 
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