2020 NEC : GEC and bonding screw with “emergency disconnect, service equipment”

Deltaforce said:
Emergency disconnect outside home, has ng bond
But another ng bond in service panel inside home that is issue cause by em disconnect
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You don't seem to be familiar with residential services or the equipment here
 
roger said:
The Emergency Disconnect does not have a OCPD
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My Case it does - It simply matches the Main Breaker size for the service panel in the garage

My understanding is ED (not service equipment) can, but doesn't have to have OCPD. The main panel (service equipment) does have a main breaker Always in this scenario

The ED, Service Disconnect, always has OCPD and you can do MLO panel inside (as a subpanel) - yes I know this is common sense I'm just trying to be explicit
 
B677 said:
My Case it does - It simply matches the Main Breaker size for the service panel in the garage

My understanding is ED (not service equipment) can, but doesn't have to have OCPD. The main panel (service equipment) does have a main breaker Always in this scenario
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You're understanding is correct, it can have OCP but doesn't have to.
 
Deltaforce said:
You right I no idea. Please tell where service panel in present case and where second ng bond inside or outside home
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In this case Service panel is in the garage fed 3 wire THHN 3/0 L1,L2 and 2/0 N - maybe 20' of conduit from outside to the main service panel. This panel has barriers on the line side lugs and the MBJ is a green screw. Its a 42 Space 225A QO main breaker panel

Upstream on the line side is "Emergency disconnect, Not service Equippent". This is a SQD enclosure with a 225A split phase breaker installed inside. Inside this enclosure , The GEC runs to the Neutral terminal per 250.24(a)(1) and is continuous to two ground rods - Here is where the inspector wants me to remove the GED from the Neutral, add a irreversible splice and run it up to the meter and connect it there (Which I think is not necessary) - the only problem is all the Mike Holt Graphics show all the outside disconnects as Service Disconnects - and the GEC connected there - I'm worried the inspector will say that you can only connect the GEC at the Meter or Service Disconnect

Edit: Attached is basically what I have though my MBJ is in the service panel - The green Screw in my enclosure is to bond the metal disconnect enclosure to the Service Neutral
 

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roger said:
It doesn't matter how many NG bonds there are before the service disconnect. This discussion is about 230.85 condition 3
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230.85 condotion3 for em disconnect upstream main service disconnect
That is not our discuss
Which code article allow ng bond inside home?
 
B677 said:
My Case it does - It simply matches the Main Breaker size for the service panel in the garage

My understanding is ED (not service equipment) can, but doesn't have to have OCPD. The main panel (service equipment) does have a main breaker Always in this scenario

The ED, Service Disconnect, always has OCPD and you can do MLO panel inside (as a subpanel) - yes I know this is common sense I'm just trying to be explicit
Click to expand...
Yes you're correct. Also the service disconnect typcially has an OCPD (i.e-the main breaker in a panel) but it can be in a separate enclosure adjacent to the service disconnect.
 
B677 said:
In this case Service panel is in the garage fed 3 wire THHN 3/0 L1,L2 and 2/0 N - maybe 20' of conduit from outside to the main service panel. This panel has barriers on the line side lugs and the MBJ is a green screw. Its a 42 Space 225A QO main breaker panel

Upstream on the line side is "Emergency disconnect, Not service Equippent". This is a SQD enclosure with a 225A split phase breaker installed inside. Inside this enclosure , The GEC runs to the Neutral terminal per 250.24(a)(1) and is continuous to two ground rods - Here is where the inspector wants me to remove the GED from the Neutral, add a irreversible splice and run it up to the meter and connect it there (Which I think is not necessary) - the only problem is all the Mike Holt Graphics show all the outside disconnects as Service Disconnects - and the GEC connected there - I'm worried the inspector will say that you can only connect the GEC at the Meter or Service Disconnect

Edit: Attached is basically what I have though my MBJ is in the service panel - The green Screw in my enclosure is to bond the metal disconnect enclosure to the Service Neutral
Click to expand...
As the attachment show I believe the proper term for the green screw in my "emergency disconnect, not service equipment" would be a "supply side bonding jumper" (per 250.92?)
 
B677 said:
As the attachment show I believe the proper term for the green screw in my "emergency disconnect, not service equipment" would be a "supply side bonding jumper" (per 250.92?)
Click to expand...
If the EM disconnect is not service equipment it would not be the MBJ. I agree a SSBJ.
 
B677 said:
Upstream on the line side is "Emergency disconnect, Not service Equippent". This is a SQD enclosure with a 225A split phase breaker installed inside. Inside this enclosure , The GEC runs to the Neutral terminal per 250.24(a)(1) and is continuous to two ground rods - Here is where the inspector wants me to remove the GED from the Neutral, add a irreversible splice and run it up to the meter and connect it there (Which I think is not necessary) - the only problem is all the Mike Holt Graphics show all the outside disconnects as Service Disconnects - and the GEC connected there - I'm worried the inspector will say that you can only connect the GEC at the Meter or Service Disconnect
Click to expand...
Can you make up a quick sketch, snap a photo and post it?
 
infinity said:
If the EM disconnect is not service equipment it would not be the MBJ. I agree a SSBJ.
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Thanks I appreciate the feedback

My only concern is that this inspector might argue that my "Emergency disconnect, Not service equipment" might not allow the GEC to originate at this Disconnect. The disconnect is service rated, but only being used as an emergency disconnect.

So I just want to be sure 250.24(a)(1) applies when landing my GEC on the neutral block in the ED (Not service equipment) the same way as it applies to ED, Service disconnect
 
B677 said:
In this case Service panel is in the garage fed 3 wire THHN 3/0 L1,L2 and 2/0 N - maybe 20' of conduit from outside to the main service panel. This panel has barriers on the line side lugs and the MBJ is a green screw. Its a 42 Space 225A QO main breaker panel

Upstream on the line side is "Emergency disconnect, Not service Equippent". This is a SQD enclosure with a 225A split phase breaker installed inside. Inside this enclosure , The GEC runs to the Neutral terminal per 250.24(a)(1) and is continuous to two ground rods - Here is where the inspector wants me to remove the GED from the Neutral, add a irreversible splice and run it up to the meter and connect it there (Which I think is not necessary) - the only problem is all the Mike Holt Graphics show all the outside disconnects as Service Disconnects - and the GEC connected there - I'm worried the inspector will say that you can only connect the GEC at the Meter or Service Disconnect

Edit: Attached is basically what I have though my MBJ is in the service panel - The green Screw in my enclosure is to bond the metal disconnect enclosure to the Service Neutral
Click to expand...
See you comply 250.6
Or inspectors make wild demands!
 
B677 said:
Thanks I appreciate the feedback

My only concern is that this inspector might argue that my "Emergency disconnect, Not service equipment" might not allow the GEC to originate at this Disconnect. The disconnect is service rated, but only being used as an emergency disconnect.

So I just want to be sure 250.24(a)(1) applies when landing my GEC on the neutral block in the ED (Not service equipment) the same way as it applies to ED, Service disconnect
Click to expand...
Can't you land the GEC in the meter?
 
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