Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-12-2013, 12:55 PM   #1
Newbie
 
Join Date: Jan 2013
Posts: 3
Rewards Points: 10
Question

Cable reaches 120 F - OK?


I have a 100 amp breaker panel feeding an electric furnace through ~ 30 feet of aluminum cable specified as "PRIORITY 3C 2AWG AA8000 1C 4AWG AA8000 TYPE SE STYLE R XHHW-2 600V XIPE (UL) 2008 05323 FT".

When the furnace is running, the outside jacket of the cable reaches 120 degrees F. Is this indicative of a problem? From what I've been able to look up on the cable I believe it is OK for the 100 amp service.

Any advice is appreciated.

Rick Danya is offline   Reply With Quote
Old 02-12-2013, 01:04 PM   #2
UAW SKILLED TRADES
 
Stubbie's Avatar
 
Join Date: Jan 2007
Location: Kansas
Posts: 5,128
Rewards Points: 2,226
Default

Cable reaches 120 F - OK?


Quote:
Originally Posted by Rick Danya View Post
I have a 100 amp breaker panel feeding an electric furnace through ~ 30 feet of aluminum cable specified as "PRIORITY 3C 2AWG AA8000 1C 4AWG AA8000 TYPE SE STYLE R XHHW-2 600V XIPE (UL) 2008 05323 FT".

When the furnace is running, the outside jacket of the cable reaches 120 degrees F. Is this indicative of a problem? From what I've been able to look up on the cable I believe it is OK for the 100 amp service.

Any advice is appreciated.

I hope that breaker panel is dedicated to the furnace and is fed from service equipment panel that is 200 amps or so.

That temp. is not excessive XHHW-2 is rated 90C or 194F

The wire size would suggest a amperage requirement of the furnace to be in excess of 65 amps.

__________________
" One nice thing about the NEC articles ... you have lots of choices"

Stubbie

Last edited by Stubbie; 02-12-2013 at 01:12 PM.
Stubbie is online now   Reply With Quote
Old 02-12-2013, 01:57 PM   #3
Newbie
 
Join Date: Jan 2013
Posts: 3
Rewards Points: 10
Default

Cable reaches 120 F - OK?


Thanks for the quick reply. The breaker panel is dedicated to the furnace and it's connected directly to the meter as a separate 100 amp service.

The furnace manual says the max current draw could be 97 amps. It's a 22.5KW unit.
Rick Danya is offline   Reply With Quote
Old 02-12-2013, 05:16 PM   #4
Semi-Pro Electro-Geek
 
Join Date: Jul 2009
Location: Arizona, USA
Posts: 2,559
Rewards Points: 2,014
Default

Cable reaches 120 F - OK?


#2 Aluminum XHHW-2 is good for 100A if the equipment is rated for 90*C terminations. Which it's almost certainly not. So it's good for 90A. The furnace is a bit of an overload for that cable in that installation, but I would not change it.
__________________
I am a lawyer, but not your lawyer. And who cares anyways? We're here to talk construction. This is DIY advice, not legal advice.
mpoulton is offline   Reply With Quote
Old 02-12-2013, 06:09 PM   #5
Electrical Contractor
 
rrolleston's Avatar
 
Join Date: Oct 2011
Location: Granville, NY
Posts: 1,941
Rewards Points: 1,000
Send a message via AIM to rrolleston Send a message via Yahoo to rrolleston
Default

Cable reaches 120 F - OK?


Quote:
Originally Posted by Rick Danya View Post
I have a 100 amp breaker panel feeding an electric furnace through ~ 30 feet of aluminum cable specified as "PRIORITY 3C 2AWG AA8000 1C 4AWG AA8000 TYPE SE STYLE R XHHW-2 600V XIPE (UL) 2008 05323 FT".

When the furnace is running, the outside jacket of the cable reaches 120 degrees F. Is this indicative of a problem? From what I've been able to look up on the cable I believe it is OK for the 100 amp service.

Any advice is appreciated.
I also agree with mpoulton but you could always get someone in there to check to make sure all the connections are good and maybe check how much it's drawing. Just a few bucks to have the extra insurance that everything is checked over and OK.
__________________
With Electricity there is the right way to do it and the dead way. Just because it works does not make it safe.
rrolleston is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
sound out of cable box amakarevic Home Theater 11 05-18-2012 11:26 AM
Running cable under/around laminate floor greenjelly Flooring 4 08-06-2010 10:49 AM
Need help sizing Generator cable dgajr Electrical 2 07-20-2010 01:07 AM
Evaluating a kinked cable dave11 Electrical 5 05-09-2010 11:20 AM
Underground service entrance cable requirements. kgt55 Electrical 9 06-22-2009 07:55 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.