250.24(A)(2) Outdoor transformers

[tryinghard]

I checked with the poco today and they require rigid metal with direct buried conduits and pvc with concrete encased.

This would still create a parallel path and allowed.

It will also allow dangerous touch voltage (objectionable current) at any location one can touch metal involved while also grounded, i.e. main disconnect. The amount will be determined by the earth conductivity and neutral unused voltage. PG&E allows PVC SCH 40 without concrete encasement, see PG&E Engineering Document 063928.

Yes i agree that pvc should be used and i would gather that Zane is using pvc.

If metal is used, he could leave out the jumper in the main gear, but like i said before, it's hard for inspectors to agree with that. They all want the jumper in at the first ocpd.

Only if it is a service.

I still don't have a clear understanding of what " through the earth " is referring to...Rick

Current routing through earth rather than other conductive items.