ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
From an outsider- How does tipping work?
by NORCAL - 01/17/21 05:26 AM
Can I ask for your input?
by electure - 01/16/21 07:04 PM
Ground fault remover :-)
by NORCAL - 01/16/21 10:29 AM
Photo Editing Software?
by grich - 01/13/21 11:18 AM
Happy New Year Folks!!!
by Trumpy - 01/04/21 05:46 AM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
0 registered members (), 23 guests, and 14 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Overload Protection for Air Handlers #209973 05/20/13 12:26 AM
Joined: Mar 2004
Posts: 775
B
BigB Online Content OP
Member
In the Southwest virtually all 120 volt air handlers are plug and cord connected. For years we installed one of these:[Linked Image from i39.photobucket.com]

With all the newer units having built in motor overload protection it is my understanding that the fused receptacles are no longer needed/required. I believe this is also true of evaporative coolers.

Anyone have any input on this?

Work Gear for Electricians and the Trades
Re: Overload Protection for Air Handlers [Re: BigB] #209979 05/20/13 08:28 AM
Joined: Apr 2002
Posts: 7,225
HotLine1 Offline
Member
Here furnaces and air handlers are hard wired; OCP is the branch circuit breaker and/or internal from the mfg.



John
Re: Overload Protection for Air Handlers [Re: BigB] #209981 05/20/13 09:31 AM
Joined: May 2005
Posts: 984
G
ghost307 Offline
Member
A lot of the furnaces in the Midwest have a similar device to the picture, but with a switch instead of a receptacle and the furnace itself is hardwired. A service tech told me that's so he can unscrew the fuse for LOTO instead of just hoping that the homeowner doesn't turn the c/b back on.


Ghost307
Re: Overload Protection for Air Handlers [Re: BigB] #210075 05/25/13 01:30 PM
Joined: Feb 2002
Posts: 2,233
H
harold endean Offline
Member
In a lot of the older homes around here, they used to use them for furnaces and boilers as well. Usually the service was 100 amp and fuses.

Re: Overload Protection for Air Handlers [Re: BigB] #210091 05/26/13 02:09 PM
Joined: Jan 2005
Posts: 5,316
renosteinke Offline
Cat Servant
Member
I've installed a few of those, as a way to give the equipment more appropriately sized over-current protection. I'd use an Edison-base breaker, rather than a fuse. Only problem is ... they didn't work out.

They didn't work out, as the first thing the HVAC guy did on his next visit was remove them, leaving an open box in place.


Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

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

 

Member Spotlight
The_Lightman
The_Lightman
Orlando, Fl, USA
Posts: 49
Joined: August 2001
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 15
NORCAL 10
Popular Topics(Views)
273,978 Are you busy
207,734 Re: Forum
195,442 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3