200 amp sub for shop pics ( I think its wrong)

[rmack898]

So I have a 400 amp service to a remote meter base with a panel. I have a 200 amp breaker that feeds the house, and a 200 amp breaker that feeds the shop.

I had an electrical contractor set up the feed to the house.

I pulled 4 conductors to the shop panel. Three 4/0 conductors (2 hots and a neutral) and one 2/0 ground. I connected the conductors to the shop sub panel but I hired the same electrical contractor to make the connection act the meter and check my work.

The electrician made the connections at the meter base and said that my work was fine but I have doubts as to whether it is right.

The ground and the neutral are bonded at the shop sub panel. Since I am running all of the circuits in the shop with EMT, I'm thinking that the ground should be bonded to the metal enclosure and that the neutral and ground conductor in the cabinet should be separated since i'm using the conduit as the ground conductor.

Look at the pics and see if I'm missing something.

 

[mike93lx]

The conduit is irrelevant. In a sub, the neutral and ground must be separated. The neutral has to be isolated from the enclosure

 

[BillK]

Is the shop a detached building ?

 

[rmack898]

The shop is a detached building. If you look at the panel, how do you isolate the neutral and ground?

 

[wyliesdiesels]

So I have a 400 amp service to a remote meter base with a panel. I have a 200 amp breaker that feeds the house, and a 200 amp breaker that feeds the shop.

I had an electrical contractor set up the feed to the house.

I pulled 4 conductors to the shop panel. Three 4/0 conductors (2 hots and a neutral) and one 2/0 ground. I connected the conductors to the shop sub panel but I hired the same electrical contractor to make the connection act the meter and check my work.

The electrician made the connections at the meter base and said that my work was fine but I have doubts as to whether it is right.

The ground and the neutral are bonded at the shop sub panel. Since I am running all of the circuits in the shop with EMT, I'm thinking that the ground should be bonded to the metal enclosure and that the neutral and ground conductor in the cabinet should be separated since i'm using the conduit as the ground conductor.

Look at the pics and see if I'm missing something.

Your work is wrong.

Neutral bar needs to be isolated from enclosure(i see a green bonding screw) and EGC needs to be terminated on a separate grounding bar attached to enclosure. Any grounds on the neutral bar need to be moved over to ground bar

also if this is detached then you need 2 have 2 ground rods. GEC for rods goes to ground bar. I do not see a large copper wire....

Also what does the ground wire on the left go to? a screw?

Is the shop a detached building ?

That does not change the requirement to have an isolated neutral bar

 

[rmack898]

SO how do I isolate the neutral and the ground since they are physically on the same lug in the panel. I have a rebar ground rod that was placed when they poured the foundation. I asked the electrician about hooking a 6 awg copper wire to the rebar and he said it might be a good idea but it was not required.

I'm thinking I need a new electrician.

 

[mike93lx]

You add a separate ground bar and isolate the neutral bar. Look at the label in the panel for part numbers.

Yes, a new electrician would probably be smart

 

[wyliesdiesels]

SO how do I isolate the neutral and the ground since they are physically on the same lug in the panel. I have a rebar ground rod that was placed when they poured the foundation. I asked the electrician about hooking a 6 awg copper wire to the rebar and he said it might be a good idea but it was not required.

I'm thinking I need a new electrician.

Install ground bars in panel (1 on each side)

Remove the green wire from neutral bar and place on one of the ground bars.

Remove green bonding screw from neutral bar.

Is this detached? If so GEC from UFER needs to be connected to ground bar

 

[yatg]

Your next question might be "how do i connect that big 2/0 ground wire to the ground bar?"

https://www.homedepot.com/p/Square-...Auxiliary-Neutral-Lug-Kit-LK100ANCP/100115933

 

[rmack898]

Thanks Guys.

I stopped on the way home to pick up the needed parts but I won't get it fixed until tomorrow afternoon.

I'll post pics when I have it done for your final inspection.

 

[sberry]

I agree, the guy needs a poke about simple code requirements.

 

[rmack898]

I think I have it all straightened out now.

I added a separate ground bar to the panel and moved the 2/0 ground to that new bar. I also ran a #6 cu from the rebar in the foundation to the newly installed ground bar. The green screw was never installed bonding the neutral to the enclosure.

Let me know if its still not right. The electrician I hired decided not to bill me.

 

[sparky 1971]

I can't believe nobody said anything about the lack of a bushing. That looks like something I would do. I usually see the bushing laying on top of the panel after I have the terminations done. I have installed more custom split bushings than I care to think about.

 

[mike93lx]

I can't believe nobody said anything about the lack of a bushing. That looks like something I would do. I usually see the bushing laying on top of the panel after I have the terminations done. I have installed more custom split bushings than I care to think about.

Good catch.

 

[rmack898]

Since all the fittings are plastic I didn't think I needed a bushing. I can certainly install a "custom spit bushing" .