Insulated grounded conductor

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Help: Hello fellow Sparkys.

I have a customer who has a mb panel feeding (2) different sub panels. One of them has 3 wire (one of which is un-insulated and being used as the neutral with no groundng electrode at the panel. Will this meet code requirements in it's present condition and could you direct me to the appropriate code section?

The second panel has 3 insulated concuctors (A phase, B phase and neutral) and using a grd rod with # 10 wire. I know the #10 is too small and if it is changed to a #6 will this meet code requirements for the over all panel situation?

Sorry Guys, Both of these panels are in separate building from the residence.

These panels have been installed at least 6 years.

Thanks
 
First Light said:
Help: Hello fellow Sparkys.

I have a customer who has a mb panel feeding (2) different sub panels. One of them has 3 wire (one of which is un-insulated and being used as the neutral with no groundng electrode at the panel. Will this meet code requirements in it's present condition and could you direct me to the appropriate code section?

The second panel has 3 insulated concuctors (A phase, B phase and neutral) and using a grd rod with # 10 wire. I know the #10 is too small and if it is changed to a #6 will this meet code requirements for the over all panel situation?

Sorry Guys, Both of these panels are in separate building from the residence.

These panels have been installed at least 6 years.

Thanks
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If they were installed under 05' code and sooner, and there are no other metallic paths, then you can bond the grounded conductor to the can in each seperate structure and use it as the EGC, but under 08 code,you have to have the 4th wire no matter what. YOu need (2) ground rods at each building, and any other electrode to be used. 250.32 (b) (2)
 
Subpanels in separate buildings implies a subfeeder for each subpanel. NEC 250.32(A) would require a grounding electrode for each subpanel. These are not branch circuits and therefore the exception to the above NEC section would not apply.
 
Insulated Grounded Conductor

Insulated Grounded Conductor

Thanks guys,

The first panel is a pool panel. Shouldn't the neutral be insulated?
 
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