ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
100 Definitions: Accessible 2023
by gfretwell - 07/18/24 04:26 PM
240V only in a home and NEC?
by emolatur - 07/18/24 01:05 PM
2023 CEU Course
by gfretwell - 07/17/24 01:08 AM
Is this really a thing
by dsk - 07/16/24 01:23 PM
90.5(C) Explanatory Material 2023
by gfretwell - 07/16/24 12:14 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
0 members (), 348 guests, and 13 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Mar 2004
Posts: 814
B
BigB Offline 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?

Joined: Apr 2002
Posts: 7,389
Likes: 7
Member
Here furnaces and air handlers are hard wired; OCP is the branch circuit breaker and/or internal from the mfg.



John
Joined: May 2005
Posts: 984
Likes: 1
G
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
Joined: Feb 2002
Posts: 2,233
H
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.

Joined: Jan 2005
Posts: 5,460
Likes: 3
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.


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5