The Electrical Contractor Network

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

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
International Wire Colour Codes
by Texas_Ranger
Today at 03:29 PM
Looking for older post
by Texas_Ranger
Today at 03:22 PM
Safety at heights?
by gfretwell
Today at 02:19 AM
Last time to chat here
by Trumpy
Yesterday at 11:41 PM
Unsafe Situations
by Trumpy
Yesterday at 09:46 PM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
Admin 35
HotLine1 20
Trumpy 19
Ruben Rocha 17
gfretwell 16
Who's Online
0 registered (), 81 Guests and 11 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#166100 - 07/12/07 04:49 PM Service calculation
jem Offline
New Member

Registered: 04/30/07
Posts: 8
Loc: nc
Single family home with mother-in-law apartment, 200 amp service, all electric except for gas heat. Customer wants to install a 50 amp hot tub. Using 220.83(A) to determine if service is of sufficient capacity since no HVAC is being added. Should the existing HVAC load and new hot tub load be added to 220.83(A)(1)through(A)(4)before taking first 8kVA of load at 100% and the remainder at 40%.

Top
2017 / 2014 NEC & Related Books and Study Guides
#166140 - 07/13/07 07:25 PM Re: Service calculation [Re: jem]
HotLine1 Offline


Member

Registered: 04/03/02
Posts: 6832
Loc: Brick, NJ USA
My read is to do the calcs on the EXISTING items, then add the hot tub.

One may also consider installing an amp recorder to 'see' the real world numbers to have actual (real) load.

John

PS: Welcome to ECN
_________________________
John

Top


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