Multiple disconnect

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hhsting

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I have incoming service conductors that go into trough. Fromthe trough have one tap goning to firsr service disconnect and second tap foing to second service disconnect.

However, one main bonding jump is in trough connecting neutral and ground bar in trough. The trough also has the grounding electrode conductor connection going to neutral bar.

I always thought but not sure if its in code otherwise that main bonding jumper has to be in two service disconnects.

Can one main bonding jumper for multiple service disconnects be located in trough? Also if yes then where in code it says that?
 
Yes, it can be in or ahead of the disconnects; ahead if sized for the entire service size.
 
LarryFine said:
Yes, it can be in or ahead of the disconnects; ahead if sized for the entire service size.
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Where it says that in code? I do see that NEC 2014 article 250.28(D)(2) says main bonding jumper in each enclosure but thats not the same as one main bonding jumper in trough.
 
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hhsting said:
Where it says that in code? I do see that NEC 2014 article 250.28(D)(2) says main bonding jumper in each enclosure but thats not the same as one main bonding jumper in trough.
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A main bonding jumper is required in each disconnect enclosure...as you noted, per 250.28(D)(2).

250.24(A)(1) permits the grounding electrode conductor connection to be in the trough.

Any bonding jumper in the trough would be a supply side bonding jumper.
 
david luchini said:
A main bonding jumper is required in each disconnect enclosure...as you noted, per 250.28(D)(2).

250.24(A)(1) permits the grounding electrode conductor connection to be in the trough.

Any bonding jumper in the trough would be a supply side bonding jumper.
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I have two service disconnects fed from trough. One main bonding jumper sized per incoming utility service bonds neutral bus, ground bus and trough enclosure in trough but their is no main bonding jumper in the two service disconnects.

I guess that would be ok per code?
 
hhsting said:
I have two service disconnects fed from trough. One main bonding jumper sized per incoming utility service bonds neutral bus, ground bus and trough enclosure in trough but their is no main bonding jumper in the two service disconnects.

I guess that would be ok per code?
Click to expand...

No, each service disconnect enclosure requires a main bonding jumper.
 
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