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Ceiling Fan on T-stat wire #107423 05/02/04 05:25 PM
Joined: Oct 2000
Posts: 3,632
Admin Offline OP
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Quote
These are pics of a ceiling fan, which the homeowner told me was installed by the previous homeowner... The wire running the fan is none other that "thermostat wire"! [Linked Image] I advised her to keep it unplugged until she could have the installation done properly! Coincidentally, This wire is also running 2 other ceiling fans besides the one pictured...

-Randy (aka Lostazhell)
[Linked Image]

[Linked Image]

[This message has been edited by Webmaster (edited 05-02-2004).]

2017 / 2014 NEC & Related Books and Study Guides
Re: Ceiling Fan on T-stat wire #107424 05/02/04 06:32 PM
Joined: Aug 2002
Posts: 1,081
T
ThinkGood Offline
Member
No. Can't be. No way. NO way. NO WAY...

Re: Ceiling Fan on T-stat wire #107425 05/03/04 06:19 AM
Joined: Dec 2000
Posts: 4,286
electure Offline
Member
Randy,
Is this is in a mobile home?

Re: Ceiling Fan on T-stat wire #107426 05/03/04 09:53 AM
Joined: Aug 2002
Posts: 1,691
S
SvenNYC Offline
Member
Just how _thin_ is T-stat wire?

Is it about the same size as bell wire used for telephones? I'm amazed it hasn't overheated and melted. [Linked Image]

Nice heavy-duty plug....too bad they couldn't have at least used heavy-duty cord if they were going to do that sort of stupidity.... [Linked Image]

Re: Ceiling Fan on T-stat wire #107427 05/03/04 10:50 AM
Joined: Feb 2004
Posts: 1,436
Lostazhell Offline
Member
Scott.... Yes it is [Linked Image]

Sven.... Typical T-stat wire is 18-22AWG Solid.. typically 2 pair in a cable like this... I was amazed myself!, considering this stuff is only rated for 24V! & this was running ceiling fans in 2 other rooms! [Linked Image]

-Randy

Re: Ceiling Fan on T-stat wire #107428 05/03/04 11:28 AM
Joined: Mar 2004
Posts: 391
B
BigJohn Offline
Member
Don't you guys recognize a combination unit when you see one? That is a fan system plus surface mount radiant heating! [Linked Image] [Linked Image]

That really is incredible. I bet those fans turned at about one revolution per year on their highest setting....

-John

Re: Ceiling Fan on T-stat wire #107429 05/03/04 02:10 PM
Joined: Sep 2003
Posts: 650
W
winnie Offline
Member
Guys, have you ever looked up the ampacity of 18ga wire???

20ga wire will _easily_ carry the current needed to run a fan. The voltage drop won't even be too bad if the length is less than a few 10s of feet.

When following the NEC (as well as good engineering practise), circuit conductors need to be sized to carry the load current, to have long useful life without failure, to survive expected faults, to remain safe even in fault conditions, etc. If you give up all of these various safety enhancements, you will still have a system that works.

If running 16A through 14ga wire resulted in instant fire, there would not be all that many hack electricians around, [Linked Image] and we would never be able to have fun discussions about tap conductor rules. [Linked Image] [Linked Image] [Linked Image]

-Jon

Re: Ceiling Fan on T-stat wire #107430 05/03/04 03:12 PM
Joined: Jan 2003
Posts: 4,391
I
iwire Offline
Moderator
Quote
If you give up all of these various safety enhancements,

[Linked Image] LOL [Linked Image]

Yeah those darn 'safety enhancements' burn up my time and waste our natural resources. [Linked Image]

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: Ceiling Fan on T-stat wire #107431 05/15/04 03:31 AM
Joined: Feb 2004
Posts: 1,436
Lostazhell Offline
Member
Bob,
All those darn safety enhancements put food on my table & pay the bills! [Linked Image] If people started figuring out how to do things the right way on their own, the service industry would'nt be half as lucrative! Not to mention we wouldn't have half as many photos to bicker about here! [Linked Image] I guess the good thing is, that people call us to make things work again, we have a chance to make some difference, maybe talk a little sense into the DIYer, explain "why" things are supposed to be a certain way.... I do it almost daily! Thankfully, I've only been called a couple times for repairs after an actual fire.. & I've seen so many more things that made me wonder why they weren't ablaze already!

-Randy

Re: Ceiling Fan on T-stat wire #107432 05/15/04 10:35 AM
Joined: Apr 2001
Posts: 518
J
John Steinke Offline
Member
I just installed such a fan yesterday.
The motor was rated at about 1.5 amps, plus a 60 watt bulb. So, we're looking at 2 amps total. Three such fans would be about 6 amps.
From an engineering standpoint ONLY, #18 wire ought to be able to handle about 7 amps. Therefore, I'm not surprised that this unit ran fine, or that there are no signs of overheating.
Of course, there are still the issues of insulation rating, mechanical protection, and short-circuit protection. The breaker is still let 20 amps go through the 7 amp wire- which would allow the wires to imitate toaster filaments.
Need to be fixed? Absolutely. End of the world? I don't think so.

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