9 Unit apartment Service Calcs

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flick

Member
I wonder if someone would do a quick check on some calculations I'm working up for a bid to redo the service on a apartment building

9 units with 6100 square feet total living area (small apartments)
electric range each apartment
no laundry facilities
electric baseboard heating
gas water heating

This is what I've come up with:

Square footage (living area) 6100
3VA per square foot 18300
18 small appliance circuits
@ 1500VA each 27000

general lighting & SA 45300
first 3000 @ 100% 3000
remainder at 35% 14805
total general lighting load 17805

electric space heating
6100 sq ft at 10watts/ft 61000

9 electric ranges, less than
12kW, table 220.55 24000

Total Load for service calc 102805

Load at 240V 1PH 428 A
Neutral Load using 70%
reduction for electric
ranges 144

No unbalanced load above
200A


I think I've covered everything. There are some house loads I need to add in, however I don't have them nailed down yet.


Anyone see anything that I'm missing? Any critique is welcome. I'd like to nail this, and if I've made an error, by all means let me know.


Thanks guys,

John


Sorry about the format. I don't know how to post a chart to make it easier to read
 
Last edited:

George Stolz

Moderator
Staff member
Location
Windsor, CO NEC: 2017
Occupation
Service Manager
flick said:
I think I've covered everything.
No disposals, dishwashers, no other fixed appliances?

Sorry about the format. I don't know how to post a chart to make it easier to read
IMO, I think you did great. The numbers look good, and it was easy to read.

Is this just a service change, or remodeling?
 

flick

Member
This is just a service change. The apartments are like efficiency apts....very small, some 1 bedroom, some 2 bedroom.

The existing service is a mess after 40 years of various people butchering it. I'll try to get some pictures tomorrow of what's there now.

No disposals, dishwashers, or other appliances.

Has a 200A service now, with a bunch of baseboard heaters already installed and running. The units are wired every which way and the loads are not separated correctly. It's a mess and the city is coming down hard on the owner.

It could be a good job for me. Of course I'll probably do a 60% down, 30% before rough inspection, and 10% at final.

I don't know the owner, so don't want to get burned.


John
 
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