Ground to Service Entrance Conduit

[John Gromkoski]

Is grounding the electrical system to the steel underground service entry conduit acceptable? 1975 home.

[Jeffrey R. Pope]

It may be ok...

Electrodes of pipe or conduit shall not be smaller than metric designator 2L (trade size 3/4) and, where of iron or steel, shall have the outer surface galvanized or otherwise metal-coated for corrosion protection.

[John Gromkoski]

Originally Posted by jpope

It may be ok...

It makes theoretical sense to me but didn't know if it violated any standards. Thanks.

[Christopher Currins]

Originally Posted by jgromkoski

It makes theoretical sense to me but didn't know if it violated any standards. Thanks.

Check with local power company.

[Robert Meier]

Originally Posted by jgromkoski

Is grounding the electrical system to the steel underground service entry conduit acceptable? 1975 home.

Seems like an odd setup, do you have any photo's?

[Jim Port]

I agree with Robert. How much conduit is actually buried and how deep is it buried?

[John Gromkoski]

Originally Posted by Robert Meier

Seems like an odd setup, do you have any photo's?

see photos attached

[Jim Port]

I think I am seeing a bonding locknut in the back of the panel. I do not think this is using the conduit as the GEC or electrode.

[Robert Meier]

As Jim stated they put a bonding jumper from the screw of the bonding locknut to the neutral bar. It was either improper or not required depending on the KO that the conduit entered into. This has nothing to do with a grounding electrode. In fact I would bet that the conduit with the bonding locknut just comes out of the back of the meter enclosure and never enters the ground.

[Bill Smith]

Fairly common in the 5 boros. I think it's a Con Ed thing.

[Robert Meier]

Originally Posted by bsmith

Fairly common in the 5 boros. I think it's a Con Ed thing.

What's a Con Ed thing, the bonding jumper on a bonding locknut or just a bonding jumper in general?

[Jim Port]

Originally Posted by jgromkoski

Is grounding the electrical system to the steel underground service entry conduit acceptable? 1975 home.

Based on the pictures that is not an underground service entrance conduit that the bond locknut is installed on.

[Bill Smith]

Con Ed (Consolidated Edison) is the local POCO. The use of the conduit as the GEC was fairly common practice years ago.