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What Code Rule? #113115 03/05/02 11:34 PM
Joined: Oct 2000
Posts: 3,630
Admin Offline OP
[Linked Image]
What Code Rule?

An Electrical Inspector in Minnesota made an installer encase this service raceway in concrete in the building!

Charles Abruscato

Tools for Electricians:
Re: What Code Rule? #113116 03/06/02 01:18 AM
Joined: May 2001
Posts: 717
George Corron Offline
230-70(a) covers the entrance of service cables. It gives no footage as to how far inside a building you can take the conductors, but leaves that up to each jurisdiction, some are more than others, in VA we tend to the 5 foot rule. that a fire wall with the branch circuitry run through it? 300-21 says you got away with something if so. Also BOCA code if your area adheres to that, you have to seal with fire rated equivalent materials any hole you make in the fire wall.

230-6 states that a conductor encased in 2" of concrete (or Brick) is considered outside the building so you can run it as far as you like.

These are obviously not High Voltage conductors, but if they were the "National Electrical Safety Code" offers a bit tougher standard, just for your knowledge.

1999 NEC

[This message has been edited by George Corron (edited 03-06-2002).]

Re: What Code Rule? #113117 03/06/02 10:46 PM
Joined: Aug 2001
Posts: 599
Nick Offline
By the conductor ID it looks like a corner grounded delta. Am I right? (just an observation) Is that an overcurrent device that the grounded conductor is going into? [Linked Image]

Re: What Code Rule? #113118 03/06/02 11:46 PM
Joined: Nov 2000
Posts: 2,148
resqcapt19 Offline
You are permitted to land all three conductors of a corner grounded delta system on a breaker. See 240-22.

Re: What Code Rule? #113119 03/07/02 08:27 AM
Joined: Mar 2001
Posts: 2,056
Redsy Offline
I think the panel design is confusing. I believe the neutral lug only connects to the neutral bus (by running behind the line lugs).
The branch ckt. neutrals on the bus tell me that it is not a corner grounded delta. Wouldn't they have to connect to the breakers if they were serving 3 phase loads?
As Don said, grounded conductors can be attached to a breaker because it opens the ungroundeds also.
Anyone else?

[This message has been edited by Redsy (edited 03-07-2002).]

Re: What Code Rule? #113120 03/07/02 06:38 PM
Joined: Dec 2000
Posts: 4,283
electure Offline
I've never seen a Main/CB panel landed this way.
It looks like an MLO panel with the neut taped white, but in the center??
Got to admit, I've not seen an MLO panel landed this way either.
Charles, can you give us a manufacturer?? (Please) [Linked Image]

Re: What Code Rule? #113121 03/07/02 08:31 PM
Joined: Aug 2001
Posts: 599
Nick Offline
Don does it again. Can't get anything by him.

It must be single phase with a strange termination design as Redsy & Electure said.

Re: What Code Rule? #113122 03/07/02 09:50 PM
Joined: Jan 2002
Posts: 36
NoShorts4Me Offline
If I was a betting man, I'd put $50 on it being a 200 amp 120/240v single phase Square D panel.


Re: What Code Rule? #113123 03/07/02 10:26 PM
Joined: Oct 2000
Posts: 5,389
sparky Offline
I'm with NS4M,
looks like the GEC next to the noodle there....

Re: What Code Rule? #113124 03/07/02 11:40 PM
Joined: Oct 2001
Posts: 135
wolfdog Offline
Yep,Looks like a single phase 200 amp Square D. I hung one just like it last week. There is another ground/neutral bar on the right side of the main.

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