Apartment feeders

[jumper]

hypothetical question.

4 apartments -1 common area, 900 sq.ft each, common laundry, all gas heat- water-range, no A/C.

Main service disco, discos-sub meters-feeders to each apt and common area.

Apt load.

900sq.ft x 3VA=2700VA
2 SABC=3000 VA
HVAC load 500VA
Largest motor = HVAC=125% already added

5700VA-3000VA=2700VA

2700VA x .35 = 945VA

3000VA + 945VA + 500VA

total 4445VA/240V=19A

What size feeders and panel does apt need?

In short, are these feeders required to be sized to 230.79? 100 amps, 60 amps, or.....

 

[augie47]

I don't feel 230.79 would apply to the individual units as they are directly supplied by feeders (not services). I see no minimun on feeders.

 

[jumper]

I don't feel 230.79 would apply to the individual units as they are directly supplied by feeders (not services). I see no minimun on feeders.

Me neither.

 

[kwired]

hypothetical question.

4 apartments -1 common area, 900 sq.ft each, common laundry, all gas heat- water-range, no A/C.

Main service disco, discos-sub meters-feeders to each apt and common area.

Apt load.

900sq.ft x 3VA=2700VA
2 SABC=3000 VA
HVAC load 500VA
Largest motor = HVAC=125% already added

5700VA-3000VA=2700VA

2700VA x .35 = 945VA

3000VA + 945VA + 500VA

total 4445VA/240V=19A

What size feeders and panel does apt need?

In short, are these feeders required to be sized to 230.79? 100 amps, 60 amps, or.....

I did not go through details of your calculations but if 19 amps is all that is needed I don't see why you can't run a 20 amp feeder. Besides it would be fun to see how excited the inspector get when he sees it.

 

[augie47]

I spent the last hour trying to see how it would not be compliant and I haven't found a reason yet,

 

[kwired]

I spent the last hour trying to see how it would not be compliant and I haven't found a reason yet,

Send Jumper an invoice - he will save enough to be worth it in the cost difference between 20 amp vs 100 amp feeders.:happyyes:

 

[jumper]

Okay, I am feeling better now, I was called on this question and I felt I was right. It t'was hypothetical, I doubt anyone would do it, but it was the principle that got me.

 

[jumper]

Send Jumper an invoice - he will save enough to be worth it in the cost difference between 20 amp vs 100 amp feeders.:happyyes:

Jumper is broke, are donuts acceptable?