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Existing Service #5536 11/24/01 09:58 AM
Joined: Nov 2001
Posts: 4
W
wirenut Offline OP
Junior Member
Question? There is a 200 amp 240/120 volt single phase service.
This is an exsiting service on a small restaurant. Existing service has an A/C unit and Air Handler with Heat strips. 2 light circuits and 1 Rec. circuit with 4 outlets on it. 1 sign circuit.
How do I come up with the existing load calcuation for the service? And have to add additional another ac unit, air handler, HWH, 15 kitchen circuits and general recs and lighting etc.

What method do I use to get the existing load and what calcuation in the code do I use to determine to new service size?

Thanks,

Work Gear for Electricians and the Trades
Re: Existing Service #5537 11/24/01 03:55 PM
Joined: Mar 2001
Posts: 2,056
R
Redsy Offline
Member
Have you tried Art. 220 B?
Also, see 220-35,36.(1999NEC)

Re: Existing Service #5538 11/24/01 05:08 PM
Joined: Sep 2001
Posts: 26
J
johngeorge Offline
Member
Check out 220-36 of the 2002 NEC - it sounds as though you may qualify as a "new" restaurant and will be able to use this shorter calculation. You will have to determine the total connected load - including heating + cooling - that's everything using electricity - add all new equipment with nameplate ratings and go to the table to find your demand factor. This eliminates the use of part II of section 220 which could cause you grief. I would add a few amps for that unforseen appliance that they didn't tell you about. Good Luck

Re: Existing Service #5539 11/25/01 02:48 AM
Joined: Oct 2000
Posts: 2,721
Scott35 Offline
Broom Pusher and
Member
Wirenut,

Is this the same service as described in the thread "What size is the service"?

Check that thread for a little bit o' information from me.

Sorry I can't give exacts, but there should be something helpful.

Scott SET


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

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