300 amp

[normbac]

Was asked to bid a residence major remodel. Owner wants a meter base outside garage with a 300 amp panelboard inside garage. Dont know where he came up with this design.
Twin 150 sounds more practical :-?
My question is where can I find pricing for a 300 panel, wherehouse says they dont carry such a panel. I have seen a 320 meter base but I personally have never seen a 300 panel. Is there such a thing and is it rediculous in price. I only speak with the GC and he says owner wants it this way? TIA

 

[micromind]

I've never seen a 300 amp panel either. The 320 meters usually feed either a 400, or 2-200's. I've seen them with a single 400, 2-200's for remote sub-panels and 2-200's with one integral panel, and another 200 for a sub.

I've been involved in the construction trades almost 35 years now, 18 as an electrician, and I've found in every instance where a homeowner displays this obvious lack of actual knowledge combined with this sort of job direction, it gets much worse as the job progresses. If he's already determined that he wants a service size that doesn't exist, what else is he going to throw at you later on?

 

[LarryFine]

Twin 150 sounds more practical.

I agree, and a pair of 150's or 200' would (a) probably be less expensive than a single 300/400, and (b) give you a greater circuit-count capacity.

As a plus, sell him on the idea of making one panel a generator panel, and divide the loads according to which circuits should be emergency ones.

 

[normbac]

I agree, and a pair of 150's or 200' would (a) probably be less expensive than a single 300/400, and (b) give you a greater circuit-count capacity.

As a plus, sell him on the idea of making one panel a generator panel, and divide the loads according to which circuits should be emergency ones.

Do 300 amp panelboards exist, it would have to be protected by a 300 ocpd which I definetley have never seen

 

[480sparky]

Do 300 amp panelboards exist, it would have to be protected by a 300 ocpd which I definetley have never seen

There's a lot of sizes listed in 240.6(A) I've never seen, either. 45, 80, 90, 110, 450, and 700. I think I've seen one 35.

 

[27hillcrest]

The only way to get a 300 amp rating that I know off is by purchasing a 400-amp frame breaker and a using a 300amp rating plug. This of course would be very expensive and not normally used in a residential environment.

 

[micromind]

I don't do much resi, mostly comm'l and alot of industrial. I've seen every size listed in 240.6. In fact, I recently finished a control house for a power plant, and the generator winding heaters were on a single pole 45 amp breaker. 10 amp breakers are pretty common for control circuits, especially if loss of control power would result in a major disruption. The idea here is that a 10 amp breaker is less likely to be turned off while searching for the feed to a lighting or recpt. circuit.