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Existing Service #5536
11/24/01 09:58 AM
11/24/01 09:58 AM
W
wirenut  Offline OP
Junior Member
Joined: Nov 2001
Posts: 4
wilmington
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
11/24/01 03:55 PM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
Have you tried Art. 220 B?
Also, see 220-35,36.(1999NEC)

Re: Existing Service #5538
11/24/01 05:08 PM
11/24/01 05:08 PM
J
johngeorge  Offline
Member
Joined: Sep 2001
Posts: 26
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
11/25/01 02:48 AM
Scott35  Offline

Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,708
Anaheim, CA. USA
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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