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#128244 - 12/05/02 08:19 AM LOAD CALCULATION HELP
SKETAR Offline
Junior Member

Registered: 12/05/02
Posts: 2
Loc: BOCA RATON,FLORIDA,U.S.A.
I ADDED POOL HEATERS TO A ELECTRICAL PANEL OF A CLUBHOUSE AND THE INSPECTOR WANTS TO KNOW THE LOAD CALCULATION FOR THE EXISTING PANEL I CANT REMEMBER HOW TO CALCULATE THE EXISTING LOAD PLUS WHAT I ADDED ON CAN ANYONE PLEASE HELP.

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#128245 - 12/05/02 09:31 AM Re: LOAD CALCULATION HELP
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
Add up the labeled currents or voltampere rating of all existing loads that can operate simultaneously. Determine the current or voltamperes available at the existing panel and its feeder circuit.

In a simplified sense, additional load must be sized to not exceed that feeder rating--or 80% or the feeder rating for continuous duty.

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#128246 - 12/12/02 05:43 AM Re: LOAD CALCULATION HELP
Redsy Offline
Member

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
See 220.35 for existing loads. If you have to, you might get some relief from it.

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#128247 - 01/03/03 05:15 AM Re: LOAD CALCULATION HELP
The Watt Doctor Offline
Member

Registered: 12/23/01
Posts: 443
Loc: Mont Belvieu, TX
As Redsy implied, get on the phone to the PoCo, and find out what the peak demand was for the last year. I'm sure that it will meet the requirements of 220.35.

Good Luck,
Doc
_________________________
The Watt Doctor
Altura Cogen
Channelview, TX

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