Sub panel in to outside building

[customelectric87]

I recently did work for a customer with a 50 amp feed to sub panel in an outside building behind the home. The main lug panel is fed with 6-3 UF. No disconnect was installed at the building also. I noticed the electrician installed two ground rods and used #10 copper as the grounding electrode conductor for the sub panel. They did isolate the neutral conductor from the ground in the panel. .Based on 250.66 the smallest size should be #8, but its only #6 service entrance conductors......I don't think it meets the code?

 

[Dennis Alwon]

I agree with you that a #8 should be used to the rod. Article 250.66 specifically states your interpretation.

 

[customelectric87]

How about the building not having a disconnect? They just used a main lug panel.

 

[kevin]

How about the building not having a disconnect? They just used a main lug panel.

For 2008 and 2011 NEC, as long as the number of circuit breakers does not exceed six, the use of a main lug panel is fine. See 225.33.

 

[Dennis Alwon]

How about the building not having a disconnect? They just used a main lug panel.

As stated above- 6 disco rule however most panels can accept a main breaker kit.