SE Cable

Status
Not open for further replies.
Re: SE Cable

Iwire,

You stated.....

"As for the load end just ask for a lug rated 75C or one that can take a 1/0 but is still listed for 6 awg as used in the example."

The 1999 NEC 110-14(c)(3) says you cannot just buy a lug and install it on a device that is rated 60C to increase the effective terminal temperature rating.. At least that is how I read it.

I have talked to Square D and they were not able to confirm to me that their QO or hom,eline breakers were rated 75C. They were supposed to send me technical info, but I never got it. If you can direct me to technical info that depicts 0-100 amp load center or panelboard plug on breakers rated 75C I would very much like to see it.


mweaver
 
Re: SE Cable

Mweaver, go here

60/75deg

virtually all their products are 75 deg rated now as is most others.

Roger

[ October 04, 2003, 05:34 PM: Message edited by: roger ]
 
Re: SE Cable

Originally posted by mweaver:
The 1999 NEC 110-14(c)(3) says you cannot just buy a lug and install it on a device that is rated 60C to increase the effective terminal temperature rating.. At least that is how I read it.
Click to expand...
You know I think you are right on that, I snapped off that answer with out thinking about it, sorry.

I still feel there is a good chance the terminals in a heater like the one pictured would have 75C terminals it would be worth a look before sizing the conductors.

Bob
 
Re: SE Cable

Roger,
Thanks for the SquareD tempbulletin. I have been looking all over for that. I have one dated '93 or something. Thanks

Iwire,

I found the GE specs at 60/75C right away on the net. Thanks for the info.

Obviously I can't say if the heater connections are good for 75C. I am going to look at a couple of brands when I get a chance, though.

What about that disconnect. Is there a disconnect 30 or 60 amp rated 75C ??

Really appreciate your responses guys. I find this quite interesting and informative.

mweaver
 
Re: SE Cable

Mweaver, you're welcome.

Roger
 
Re: SE Cable

Originally posted by mweaver:
What about that disconnect. Is there a disconnect 30 or 60 amp rated 75C ??
Click to expand...
A quick check at the square D web site shows even their general duty 30 amp disconnects are 60C/75C rated, I imagine the competitors are also.

IMO As this temperature rating has become something that is much more enforced I think the equipment manufactures are getting on board with 75C rated equipment. That alone could make the difference between a sale or a loss of a sale to the competitors.
 
Re: SE Cable

Mweaver you are welcome and you made me curious too, so I went down to my cellar of electric stuff and found a Siemens 3 pole 30 disconnect, a Square D 30 amp disconnect and a Thomas & Betts single pole 20 breaker all rated 60C/75C.

Looking further I found a GE 25 amp definite purpose contactor (the kind you would see in a unit heater) and a 12 pole GE 30 amp lighting contactor these items said 75C copper wire only, which leads me to believe that they supply a lot of heat themselves.

Take Care, Bob
 
Re: SE Cable

Iwire,

Thanks for the input. I was looking at Square D's site and could not find the tpermperature rating of the disconnect siwtches.

Do you have a link for that?

mweaver
 
Re: SE Cable

Yes I can provide a link for that and you can call me Bob :)

Go here and look about halfway down the page for the section called "Terminal Lug Data" be sure to read note "b"

30-100 Amp switches suitable for 60? C or 75? C conductors. 200-800 Amp switches suitable for 75? C conductors
Click to expand...
 
Status
Not open for further replies.
Top