ECN Forum Forums Code Related Discussion NEC & other Code issues Tie Handle?

It sounds like you have a standard Square D I-Line distribution section. It may be in a custom enclosure but it is still standard busing.

The breaker arrangement you describe is an HCW type. The left hand side can accept any breaker up to their LC frame (600A trip) and the right hand side can accept a maximum KC frame (250A trip).

You should be able to mount (2) SL225 or (1) SL800 sub-feed lug kits on the right hand side of your panel (they look like breakers without handles). From these lugs you could run parallel conductors to an externally mounted 400A breaker.

[This message has been edited by JBD (edited 03-15-2004).]

The problem with a lug kit is that there is no space in the room for an enternal 400 breaker.
This service leaves the MDP and and the main electrical service room then proceeds more than 25 feet and into a different section of the warehouse. This is the reason for leaving the disconnect inside the existing MDP and not use an external breaker.

Harold
Tom could not have stated it any better. It is their pocketbook, and your neck.

Pierre

Harold, remembering I am not an inspector, I agree with Tom, John and Pierre.

If I was the AHJ there is no way I would stick my neck out on this.

The code is clear on this issue, no gray area, no exceptions etc.

It is not your problem to find a solution to this situation.

It is nice to have an inspector that wants to help, I can not say enough good things about inspectors that want to find a solution.

JMO, Bob

did you say 400amp feeding an 800amp mdp?

Thinking about this again... Why don't they tap off of the bus and add a service disconnect off of the existing switchgear?

Pierre