ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Increasing demand factors in residential
by gfretwell - 03/28/24 12:43 AM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (gfretwell), 32 guests, and 14 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#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,

#5537 11/24/01 03:55 PM
Joined: Mar 2001
Posts: 2,056
R
Member
Have you tried Art. 220 B?
Also, see 220-35,36.(1999NEC)

#5538 11/24/01 05:08 PM
Joined: Sep 2001
Posts: 26
J
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

#5539 11/25/01 02:48 AM
Joined: Oct 2000
Posts: 2,723
Likes: 1
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!

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5