Pierre C Belarge
Senior Member
- Location
- Westchester County, New York
A large manufacturing property.
There was an existing delta-delta transformer, that was just replaced with another delta-delta transformer.
The transformer is just outside, but is supplying loads inside of the building. The reason for its location outside, is the lack of room for installation inside.
As per 250.30(7), the grounding should be steel or water within 5 feet of the water entrance.
The installer did not install the GEC for the transformer to either the steel or the water, he used ground rods.
Would this satisfy A(7) and exceptions?
P.S. the premises wiring is not grounded to the water in the building, I do not know where it grounded.
The heavy loads in this building are all delta, 3-phase, 3-wire.
There was an existing delta-delta transformer, that was just replaced with another delta-delta transformer.
The transformer is just outside, but is supplying loads inside of the building. The reason for its location outside, is the lack of room for installation inside.
As per 250.30(7), the grounding should be steel or water within 5 feet of the water entrance.
The installer did not install the GEC for the transformer to either the steel or the water, he used ground rods.
Would this satisfy A(7) and exceptions?
P.S. the premises wiring is not grounded to the water in the building, I do not know where it grounded.
The heavy loads in this building are all delta, 3-phase, 3-wire.