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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 06-02-2011, 08:46 PM   #1
Member
 
Join Date: May 2011
Posts: 63
Rewards Points: 0
Share |
Default

Must a quick-disconnect include breakers?


All the 240 VAC quick-disconnects I have seen include either two plug fuses and a two-pole knife switch -or- a two-pole breaker.

Can an ordinary DPST 30A switch be used as a quick-disconnect?

Thanks!

Daneel is offline   Reply With Quote
Old 06-02-2011, 09:07 PM   #2
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,583
Rewards Points: 0
Default

Must a quick-disconnect include breakers?


What are you trying to disconnect? What is the equipment rating? Does the equipment say fuses only?

There are disconnects with just a pullout, about $10.

__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote
The Following User Says Thank You to Jim Port For This Useful Post:
Daneel (06-03-2011)
Old 06-03-2011, 04:00 AM   #3
Member
 
Join Date: May 2011
Posts: 63
Rewards Points: 0
Default

Must a quick-disconnect include breakers?


Thanks, Jim.

I have a 4500-Watt water heater on a 240 VAC circuit that is protected by a 2-pole 30A breaker in the main panel. There is also a Wadsworth 30A quick disconnect next to the water heater in a bathroom.

I have bypassed one leg of the Wadsworth because that side of the box heats up too hot to touch, the metal has discolored, and the plug fuse on that leg blows after the water heater is powered on. I am guessing that the metal alloy on the problematic leg has gone bad and offers enough resistance to get hot when a continuous 19A flows through it.

The 30A breaker in the panel has never blown. I was thinking about replacing the quick disconnect with a Leviton SPDT 30A industrial switch from Home Depot for $11:

www.homedepot.com/h_d1/N-5yc1v/R-100356941/h_d2/ProductDisplay?landId=-1&storeId=10051&catalogId=10053

Would this meet code?

Thanks,
Daneel
Daneel is offline   Reply With Quote
Old 06-03-2011, 04:04 AM   #4
Member
 
Join Date: May 2011
Posts: 63
Rewards Points: 0
Default

Must a quick-disconnect include breakers?


I have not found anything on the water heater that addresses quick disconnect specifications.

I am assuming that the code requires a quick disconnect next to the heater.
Daneel is offline   Reply With Quote
Old 06-03-2011, 04:19 AM   #5
Newbie
 
Join Date: May 2011
Posts: 13
Rewards Points: 0
Default

Must a quick-disconnect include breakers?


Quote:
Originally Posted by Daneel
I have not found anything on the water heater that addresses quick disconnect specifications.

I am assuming that the code requires a quick disconnect next to the heater.
Code often requires for safety reasons when servicing. Many a plumber has been killed when servicing a supposedly disconnected water heater that was still energized. I'd go with the pull type mentioned earlier (may be required); inexpensive and no question when it is deenergized.
Rbneron is offline   Reply With Quote
Old 06-03-2011, 06:38 AM   #6
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,784
Rewards Points: 0
Default

Must a quick-disconnect include breakers?


The disconnect does not need to have a breaker or fuses.
Most 30 disconnects at the box stores have a switch that look like a breaker, but does not function like a breaker.

Any 30 A/C disconnect will work.

__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Fused disconnect or unfused, motor is fed from breaker... Do It Right Electrical 17 03-19-2011 12:28 AM
Service Disconnect Wiring stlcardinalsguy Electrical 11 02-27-2011 10:42 PM
Disconnect requirement? delta_kilo Electrical 3 06-09-2010 11:06 PM
Total of Circuit Breakers xraydido Electrical 19 05-13-2010 01:08 PM
Replace breakers with "arc fault protected" ones? bassman99 Electrical 20 05-05-2009 01:35 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.