ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

Topic Options
Rate This Topic
#5536 - 11/24/01 05:58 AM Existing Service
wirenut Offline
Junior Member
Registered: 11/24/01
Posts: 4
Loc: 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,
Top
Work Gear for Electricians and the Trades
#5537 - 11/24/01 11:55 AM Re: Existing Service
Redsy Offline
Member
Registered: 03/28/01
Posts: 2056
Loc: Bucks County PA
Have you tried Art. 220 B?
Also, see 220-35,36.(1999NEC)
Top
#5538 - 11/24/01 01:08 PM Re: Existing Service
johngeorge Offline
Member
Registered: 09/08/01
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
Top
#5539 - 11/24/01 10:48 PM Re: Existing Service
Scott35 Offline

Broom Pusher and
Member
Registered: 10/19/00
Posts: 2707
Loc: 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!
Top

Member Spotlight
Member Since: 11/17/00
Posts: 2232
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
0 registered (), 45 Guests and 8 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
Freecrowder, clee512, Jdscott2005, FAIZAN, Regitest2

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals