ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
EMC Glands on Motors
by Trumpy - 12/01/22 06:12 AM
Ground Rods: Installation and Hook-Up
by Trumpy - 12/01/22 05:54 AM
Happy Thanksgiving all!
by gfretwell - 11/30/22 05:55 PM
Colt Firearms Switchbox
by NORCAL - 11/29/22 01:04 AM
Perfect work light?
by gfretwell - 11/22/22 12:48 AM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
1 members (Scott35), 59 guests, and 15 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#100991 01/25/07 07:15 PM
Joined: Jan 2007
Posts: 59
D
Member
In the 2002 code,is T220.19 for load calculations....I have a gut telling me you can set your overcurrent prot. and wire size by this table......

Stay up to Code with the Latest NEC:


2020 NEC & Related Reference & Study Guides
2020 NEC & Related Reference & Study Guides
Pass Your Exam the FIRST TIME with these Exam Prep Combos:
 

>> Master Electrician Exam Prep     >> JourneyMan Electrician Exam Prep
 

#100992 01/28/07 06:26 AM
Joined: Nov 2005
Posts: 31
J
Junior Member
This section of the code is for multiple groups of ranges. It is the most confusing part of the code in My opinion. You must use all three columns. It is not like dryers that run a percentage on the total number. To use this table it takes a bit figuring out

#100993 01/28/07 10:09 AM
Joined: Jan 2007
Posts: 59
D
Member
When I posted this message I meant to say GUY instead GUT....sorry.I would appreciate input on this...thanks jdo.

#100994 01/28/07 10:34 AM
Joined: Jan 2004
Posts: 1,507
G
Member
This was posted previously last week and I responded but I'm not sure what I said was very definitive. I have since asked around and looked at the code again and here's what I belive the code says:
220.19 (2002) and 220.55 (2005) and their associated tables are for calculating the load(s) for branch circuits, feeders or services.

The other code reference 210.21(B)(4) tells us that we can size the receptacle based on 220.19 ('02) or 220.55 ('05) so if we size the receptacle using this approach we more than likely would size the rest of the circuit this way.

Also look at Note 4 for Table 220.19 ('02) or 220.55 ('05) and you get a sense of how a branch circuit for a single range is sized.

The code also says that for a 12KW range the receptacle can not be less than 40a.

8000/240=33.3 but we must use a 40a. wire and overcurrent and I think a 50a. receptacle. I don't believe they make a 40a. receptacle

I would like to hear from others as to my error or lack thereof.

[This message has been edited by George Little (edited 01-28-2007).]


George Little
#100995 01/28/07 11:35 AM
Joined: Jan 2004
Posts: 1,507
G
Member
Interesting:
12000 KW range would be calculated as following for load.

Start with 8000 and add 1600 (based on Note 1)=9600.

9600/240 = 40a.


George Little
#100996 01/28/07 12:12 PM
Joined: Jan 2007
Posts: 59
D
Member
tks...give me some more studying

#100997 01/28/07 06:20 PM
Joined: Jan 2007
Posts: 59
D
Member
But don't u think I could not treat the only range in the house,let's say a 12kw,as an 8kw as far as wire and breaker size?

#100998 01/28/07 07:23 PM
Joined: Jan 2004
Posts: 1,507
G
Member
Yes


George Little

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
 
* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
CharlieE
CharlieE
Indianapolis
Posts: 201
Joined: April 2004
Top Posters(30 Days)
Trumpy 9
NORCAL 5
Popular Topics(Views)
300,508 Are you busy
230,151 Re: Forum
214,962 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5