Recessed Cans Install - Electrical - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 06-02-2008, 10:13 PM   #1
Member
 
Join Date: Jan 2008
Posts: 38
Rewards Points: 25
Default

Recessed cans install


I am installing several IC (insulated ceiling) rated recessed cans. Due to the positioning of the cans in relation to the joists, some of the Cerro brand NM-B 14-2 600 volts wire will come in direct contact with the hot cans. (The cans do get hot to the touch with the recommended 75w Halogen bulb)--The wire will be tightly sandwiched between the can and a joist.
My concern is will the wire be able to handle the heat and if so, would installing it this way be within code? The can manufacturer, Halo, tells me no problem as long as the wire is rated at 90 degrees C. What do you guys say?
Should I chisel a recess in the joist for the wire to sit in and then cover the recess with a nail guard?--Or would that be a waste of time?
Thanks.

Advertisement

billyg is offline   Reply With Quote
Old 06-02-2008, 10:31 PM   #2
Power Gen/RS Engineer
 
Join Date: Jun 2006
Location: Oak Park, Illinois
Posts: 751
Rewards Points: 500
Default

Recessed cans install


Quote:
Originally Posted by billyg View Post
I am installing several IC (insulated ceiling) rated recessed cans. Due to the positioning of the cans in relation to the joists, some of the Cerro brand NM-B 14-2 600 volts wire will come in direct contact with the hot cans. (The cans do get hot to the touch with the recommended 75w Halogen bulb)--The wire will be tightly sandwiched between the can and a joist.
OK, I don't usu. do romex but I don't understand how, at 16" o.c., the cable would have to come into contact with the cans? Why not run it around the other side of the can???

Quote:
Originally Posted by billyg View Post
Should I chisel a recess in the joist for the wire to sit in and then cover the recess with a nail guard?--Or would that be a waste of time?Thanks.
Oh god no. Please. Put the chisel down and move away from the poor, unsuspecting joist.

Advertisement

__________________
Well, now, there's what's right and what's right and never the twain shall meet.
BigJimmy is offline   Reply With Quote
Old 06-03-2008, 04:39 AM   #3
Member
 
Join Date: Apr 2008
Posts: 51
Rewards Points: 75
Default

Recessed cans install


use heat resistance sleeves to cover the wire. It can handle some considerable heat to protect wire.
mpj111 is offline   Reply With Quote
Old 06-03-2008, 05:33 AM   #4
Member
 
Join Date: Jan 2008
Posts: 38
Rewards Points: 25
Default

Recessed cans install


Newbie,
Would the sleeves be the "heat shrink" type?--Looks like thin black tubing?
Thanks.
billyg is offline   Reply With Quote
Old 06-03-2008, 04:59 PM   #5
Member
 
Join Date: Apr 2008
Posts: 51
Rewards Points: 75
Default

Recessed cans install


Not the shrinking type,( they are mainly to cover the bear copper in order to insulate), There are sleeves available, do some shopping around in couple of electrical supplier.
mpj111 is offline   Reply With Quote
Old 06-03-2008, 05:36 PM   #6
Licensed Electrician
 
jrclen's Avatar
 
Join Date: Feb 2008
Location: central wisconsin
Posts: 982
Rewards Points: 500
Default

Recessed cans install


NM-B is rated at 90 degree C.
__________________
John
jrclen is offline   Reply With Quote
Old 06-03-2008, 07:19 PM   #7
Electrical Contractor
 
wirenut1110's Avatar
 
Join Date: Apr 2008
Location: Chester, VA.
Posts: 1,051
Rewards Points: 504
Send a message via AIM to wirenut1110
Default

Recessed cans install


Quote:
Originally Posted by jrclen View Post
NM-B is rated at 90 degree C.
NM is rated at 60 deg, 90 if derating 334.80. I could stand corrected but it's how I've always understood the article.
wirenut1110 is offline   Reply With Quote
Old 06-03-2008, 08:34 PM   #8
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,961
Rewards Points: 2,318
Default

Recessed cans install


MN-B is rated for 90 degree C for derating, but you must use 60 degree C for ocpd.
__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is online now   Reply With Quote
Old 06-03-2008, 09:37 PM   #9
Licensed Electrician
 
jrclen's Avatar
 
Join Date: Feb 2008
Location: central wisconsin
Posts: 982
Rewards Points: 500
Default

Recessed cans install


The OP stated the manufacturer said everything was fine if the conductors are rated at 90C. That is very common with light fixtures, and NM-B is rated at 90C for that purpose. No mention was made about ampacity or derating. Just the temperature rating of the insulation.
__________________
John
jrclen is offline   Reply With Quote
Old 06-03-2008, 11:13 PM   #10
Electrician
 
Join Date: Aug 2007
Location: Connecticut, Litchfield
Posts: 2,015
Rewards Points: 1,000
Default

Recessed cans install


as already mentioned, just pick another route for the wire...

Advertisement

chris75 is offline   Reply With Quote
Reply


Thread Tools
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
Recessed Lighting under hot/cold supplies?? KC10KEVIN Electrical 1 05-08-2008 11:21 PM
Recessed Cans fall right in the middle of my drywall seam... What do i do?? AndyH Building & Construction 20 03-13-2008 08:12 PM
Fluorescent lights to recessed cans. How do I determine where and how many? Bacardi 151 Electrical 13 11-06-2007 02:37 AM
Recessed light plan foiled? kcrossley2 Electrical 8 03-15-2007 12:08 AM
Can I Mount Can (recessed) Lights Vertical? jmaguire123 Electrical 9 11-28-2006 08:49 AM




Top of Page | View New Posts