ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Recent Posts
Question on power to 4 Nema 6-50 & 5 Nema 5-15.
by TrickedoutTech. 10/22/17 11:36 PM
VFD MotorFeeders
by Yoopersup. 10/22/17 07:52 PM
Generator Cable Sizing
by brsele. 10/18/17 07:39 PM
What do you do?
by gfretwell. 10/17/17 01:08 AM
Good ol' copper pipe in the fuse holder trick
by HotLine1. 10/16/17 07:16 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
241,456 Are you busy
177,439 Re: Forum
169,023 Need opinion
Who's Online Now
1 registered members (geoff in UK), 9 guests, and 12 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
Page 1 of 3 1 2 3
#124263 - 09/08/06 07:17 PM The Worst Breaker Design Ever?  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,262
Fullerton, CA USA
This is a Zinsco RQ38, 30 Amp plug-in 2 pole circuit breaker. I believe the only reason this one lasted is because it powered a dryer receptacle in a home with a gas dryer, and was never used. It's 3/4" wide.
(It's got "IQ65" stamped in a small emblem on the side; possibly the designer's test score?)

[Linked Image]


[Linked Image]


[Linked Image]

How do you like it?
Do you have any other candidates for the honor?




[This message has been edited by electure (edited 09-08-2006).]


Tools for Electricians:

#124264 - 09/08/06 07:47 PM Re: The Worst Breaker Design Ever?  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Are those 'speaker terminals' used on a breaker????


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#124265 - 09/08/06 08:44 PM Re: The Worst Breaker Design Ever?  
mxslick  Offline
Member
Joined: Oct 2004
Posts: 803
Atomic City, ID USA
Quote
Are those 'speaker terminals' used on a breaker????


Indeed they are. And the performance is about what you'd expect from them, too. [Linked Image]

Believe it or not, this horrible piece was available in 40 and 50 amp ratings too!!

I still have a few Zinscos in my junk box, along with the bus assemply for an old mini (I think 4 space) panel.

I plan on breaking the one I have open to see what condition the internals are in. When I do, I'll post the pics....


Stupid should be painful.

#124266 - 09/08/06 08:49 PM Re: The Worst Breaker Design Ever?  
Jim M  Offline
Member
Joined: Aug 2001
Posts: 457
Chestertown, MD, USA
My vote would have to be FPE Stab-loks. Between the handles being too wide to take the cover off without turning some of them off by accident, they were prone to just falling out of the panel if you did take the cover off.


#124267 - 09/08/06 09:02 PM Re: The Worst Breaker Design Ever?  
Wizzie Electric  Offline
Member
Joined: Jan 2006
Posts: 69
Maple Creek, Saskatchewan, Can...
Ya shes a real fine instrument.(sarcastic)


Thanks.

#124268 - 09/08/06 09:32 PM Re: The Worst Breaker Design Ever?  
allen476  Offline
Junior Member
Joined: Feb 2006
Posts: 7
Elmira,NY
My nomination is the Bulldog/Gould/ITE Pushmatic. They were prone to fail to the ON position. Many never survive more than 4-6 on/off cycles.


#124269 - 09/08/06 11:26 PM Re: The Worst Breaker Design Ever?  
Rewired  Offline
Member
Joined: Jan 2006
Posts: 558
Hamilton, Ontario, Canada
I nominate the ITE "Blueline" series.. they were chincy little breakers that just felt "weak" when you operated them, and the buss-breaker connections were tiny and had a tenancy to burn up..

A.D


#124270 - 09/09/06 10:44 PM Re: The Worst Breaker Design Ever?  
Theelectrikid  Offline
Member
Joined: Apr 2004
Posts: 810
Levittown, PA
GE Skinnies. They don't trip, and an electrician (Yes, an electrician) said, "If that main didn't fry that skinny breaker would've let your house burn."

Ian A.


Is there anyone on board who knows how to fly a plane?

#124271 - 09/10/06 12:56 AM Re: The Worst Breaker Design Ever?  
trobb  Offline
Member
Joined: Jun 2006
Posts: 110
Iowa City, IA
Geeze, I'm no spark and I know that 2x 50A breakers in a single would (at load) put an unholy amount of heat through the breaker. How on earth could even CH or SD build something to work, let alone Zinsco?


#124272 - 09/10/06 04:23 PM Re: The Worst Breaker Design Ever?  
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
Personal experience is a funny thing; that's why we are taught that personal experience has no relationship to what the actual reality may be.

Failure at the buss connection is a good example of this principle. While we all "know" that certain brands are "junk," compare that opinion with my experience over the past five years.
(Again, I am only referring to failures where the breaker connects to the buss).

I've encountered this failure in:
1- Sq D "QO" 100 amp 2-pole
1- Zinsco 50 amp 2-pole
2- GE snap-in 20 amp 1-pole

Complicating factors included:
- The Sq. D was often run slightly overloaded (say, 108-112 amps); and,

- The GE failures were from a panel where the maintenace guy "cleaned the buss bars" with a wire brush on his Dremel (!!!!).


Page 1 of 3 1 2 3

Member Spotlight
lil suzi
lil suzi
Midwest
Posts: 57
Joined: August 2003
Show All Member Profiles 
Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.018s Queries: 15 (0.003s) Memory: 0.8209 MB (Peak: 0.9965 MB) Zlib enabled. Server Time: 2017-10-23 08:12:00 UTC