Load for stoves in dwelling

[nickelec]

I'm trying to figure out the service requirements for 200 stoves at 8320w service is 120/208 3 phase
Engineer is coming up with 800 amps and I want to double check

I'm having a bit of a hard time looking through example D5(a) and not sure howntheytare coming up with "maximum number between two phase legs" can some one explain

And I do think that a demand factor of 26% is required According to 220.55

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[Frank DuVal]

Wow! that is more than a typical Top Chef production. Maybe DECA competition?

8320 watts per stove at what voltage rating? Three phase stove? I have to assume single phase stove, because of the how many per phase comment.

On an overall view, 200 x 8320 is 1.6 megawatts. Divide that by square root 3 and 208 gives about 4,600 amps per phase. Hopefully some demand figure will replace that with a smaller number, but how may burners or oven elements will be on at the start of the competition?

 

[nickelec]

It's for a big building

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[nickelec]

Wow! that is more than a typical Top Chef production. Maybe DECA competition?

8320 watts per stove at what voltage rating? Three phase stove? I have to assume single phase stove, because of the how many per phase comment.

On an overall view, 200 x 8320 is 1.6 megawatts. Divide that by square root 3 and 208 gives about 4,600 amps per phase. Hopefully some demand figure will replace that with a smaller number, but how may burners or oven elements will be on at the start of the competition?

8320 wats at 208v

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[nickelec]

Something seems off

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[david luchini]

I'm trying to figure out the service requirements for 200 stoves at 8320w service is 120/208 3 phase
Engineer is coming up with 800 amps and I want to double check

I'm having a bit of a hard time looking through example D5(a) and not sure howntheytare coming up with "maximum number between two phase legs" can some one explain

And I do think that a demand factor of 26% is required According to 220.55

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I get 745 amps.

200/3=66.67, so 67 is the maximum number between any two phases.

67*2=134. (Twice the maximum number between any two phases.)

134 ranges @ 8320w = 1,114,880w.

T220.55 demand factor for (134) 8.32kW ranges is 16%.

1,114,880 * 0.16 = 178,381 kw.

Per phase demand 178,381kw / 2 = 89,416kw

Equivalent 3 phase load 89,416kw * 3 = 268,248kw = 745A at 208V, 3phase.