Room For Growth

[mannyb]

A new service 400a service with a load analysis of 120373va or 335a demand is shown on drawings. 400a feed thru panels sections 1 2 3 electrical plus a 150a subpanel in warehouse. Sections 123 wont have too much space available only the 150a subpanel in warehouse. Customer is saying they want to add stuff here and there that sounds like it will quit a bit of load so other than breaker space avaialbility. How much load could customer add given the load analysis? not to mention breaker space.

 

[Dennis Alwon]

If they plan on adding a lot of load you may want to go to 600 amps. If the load is 335 amps then you won't have much to add depending on what it is that they intend to use.

 

[petersonra]

Realistically, if the load calculation says 335 Amps, the real demand might be more like 150-200 Amps.

If you go to the utility and ask for a 600 Amp service, what is the difference between it and the 400 A service? If you show them the 335 A calculated load they will probably put in a 75 kVA transformer (or whatever makes sense to them) anyway, regardless of whether it is called a 400 A or 600 A service.

Now if the customer just wants it, no reason not to give them what they want.

 

[electrofelon]

Realistically, if the load calculation says 335 Amps, the real demand might be more like 150-200 Amps.

If you go to the utility and ask for a 600 Amp service, what is the difference between it and the 400 A service?

Agree. I'm guessing this would be fine with the 400. After a year or so you can likely get demand data from the utility and almost certainly you will be amazed at how low it is and have plenty of room for expansion.

Recently contacted a utility about upgrading from 400-600. They said they wouldn't change anything on their end.

 

[mannyb]

Realistically, if the load calculation says 335 Amps, the real demand might be more like 150-200 Amps.

If you go to the utility and ask for a 600 Amp service, what is the difference between it and the 400 A service? If you show them the 335 A calculated load they will probably put in a 75 kVA transformer (or whatever makes sense to them) anyway, regardless of whether it is called a 400 A or 600 A service.

Now if the customer just wants it, no reason not to give them what they want.

I agree. They didnt apply any demand load calculations just straight calculations.