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 09-23-2012, 02:40 PM   #1
t60
Member
 
Join Date: Jun 2010
Posts: 76
Rewards Points: 79
Default

Need to replace a main breaker, which one is correct?


I was told I needed to replace a main breaker, and just need to know which one is correct. I have this one in my panel now:



I'm very certain I need to buy this one:
http://www.amazon.com/Murray-MP2100-.../dp/B000BPDH5Y

But I saw this one too and got confused:
http://www.amazon.com/Murray-MP2100K.../dp/B0088BE7V6

I can't tell the difference..This is for a residential 100A panel.

t60 is offline   Reply With Quote
Old 09-23-2012, 02:52 PM   #2
Member
 
deverson's Avatar
 
Join Date: Sep 2012
Posts: 144
Rewards Points: 77
Default

Need to replace a main breaker, which one is correct?


Buy a whole new panel. That one doesn't owe you anything. Get the same panel and you can use the same breakers.

deverson is offline   Reply With Quote
Old 09-23-2012, 03:44 PM   #3
Member
 
Oso954's Avatar
 
Join Date: Jun 2012
Location: Northern Calif.
Posts: 1,737
Rewards Points: 1,354
Default

Need to replace a main breaker, which one is correct?


Quote:
Originally Posted by deverson View Post
Buy a whole new panel. That one doesn't owe you anything. Get the same panel and you can use the same breakers.
Why would you say that ?
He is backfeeding a 100 amp breaker in a main lug panel.
Oso954 is offline   Reply With Quote
Old 09-23-2012, 04:04 PM   #4
Member
 
Oso954's Avatar
 
Join Date: Jun 2012
Location: Northern Calif.
Posts: 1,737
Rewards Points: 1,354
Default

Need to replace a main breaker, which one is correct?


The difference is in the interrupting rating.
The MP2100 is rated at 10,000 Amperes.
The MP2100KM is rated at 65,000.

The MP2100 is the same rating as your current breaker.
Oso954 is offline   Reply With Quote
The Following User Says Thank You to Oso954 For This Useful Post:
t60 (09-23-2012)
Old 09-23-2012, 04:29 PM   #5
t60
Member
 
Join Date: Jun 2010
Posts: 76
Rewards Points: 79
Default

Need to replace a main breaker, which one is correct?


Thanks. No idea why someone would recommend replacing the entire panel (upwards of $200-300 when contracting with a licensed electrician and time pulling the permit) when replacing the $30 part would be fine.
t60 is offline   Reply With Quote
Old 09-23-2012, 05:37 PM   #6
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,926
Rewards Points: 2,248
Default

Need to replace a main breaker, which one is correct?


Do you have a way to kill the incoming power?
What makes you think you need a new breaker anyway?
__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
Old 09-23-2012, 08:46 PM   #7
t60
Member
 
Join Date: Jun 2010
Posts: 76
Rewards Points: 79
Default

Need to replace a main breaker, which one is correct?


Quote:
Originally Posted by jbfan View Post
Do you have a way to kill the incoming power?
What makes you think you need a new breaker anyway?
The utility company came out yesterday to take a look at an issue at my house, and when they pulled the main breaker, they noted it had a poor connection to the panel. He recommended replacement. He cleaned it up a bit and I haven't seen the lights flicker since. He said I just need to setup an appointment with the utility company and they will come out and kill the power at the weather head for the time I need to replace it.
t60 is offline   Reply With Quote
Old 09-23-2012, 09:03 PM   #8
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,926
Rewards Points: 2,248
Default

Need to replace a main breaker, which one is correct?


Ok, but sometimes when a main breaker goes bad, it can mess up the buss bars, and then the panel should be replaced.
__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
Old 09-23-2012, 09:11 PM   #9
Member
 
Join Date: Jul 2012
Location: Fox Valley, WI
Posts: 211
Rewards Points: 162
Default

Need to replace a main breaker, which one is correct?


Quote:
Originally Posted by Oso954
Why would you say that ?
He is backfeeding a 100 amp breaker in a main lug panel.
Everyone told me the same thing too....a new breaker is a lot cheaper if that's all that's needed
ryan50hrl is offline   Reply With Quote
Old 09-23-2012, 09:33 PM   #10
t60
Member
 
Join Date: Jun 2010
Posts: 76
Rewards Points: 79
Default

Need to replace a main breaker, which one is correct?


Quote:
Originally Posted by jbfan View Post
Ok, but sometimes when a main breaker goes bad, it can mess up the buss bars, and then the panel should be replaced.
Understood, but the breaker is ~$30 compared to a few hundred for a new panel and installation..
t60 is offline   Reply With Quote
Old 09-23-2012, 10:24 PM   #11
Member
 
deverson's Avatar
 
Join Date: Sep 2012
Posts: 144
Rewards Points: 77
Default

Need to replace a main breaker, which one is correct?


From the looks of the tie handle and the amount of rust, the rest of the panel is probably in just as bad shape. This is a "main breaker" and not a back feed situation. I would still replace the entire panel. Yes, I know how much the panel costs. Not sure a main breaker only costs 30.00. Seems pretty cheap.
deverson is offline   Reply With Quote
Old 09-23-2012, 10:35 PM   #12
t60
Member
 
Join Date: Jun 2010
Posts: 76
Rewards Points: 79
Default

Need to replace a main breaker, which one is correct?


Quote:
Originally Posted by deverson View Post
From the looks of the tie handle and the amount of rust, the rest of the panel is probably in just as bad shape.
Not sure why you have the audacity to make such a bold statement up front without even seeing the rest of the panel. That's just ignorant. Most people on the board tend to ask dozens of questions before even thinking about giving an answer.

And for your information, the panel is 3 years old (installed by a licensed electrician, who actually works for the utility company), and this breaker is the only one that shows rust.
t60 is offline   Reply With Quote
Old 09-23-2012, 11:04 PM   #13
Member
 
deverson's Avatar
 
Join Date: Sep 2012
Posts: 144
Rewards Points: 77
Default

Need to replace a main breaker, which one is correct?


If the utility company pulled the main breaker, cleaned it and replaced it and told you that it should be replaced, then I would go with their recommendation. I'm sorry if I offended you. That wasn't my intent.
I personally would replace the panel because if it overheated once it will probably loose tension on the breaker to buss connection, with arcing to the buss.
deverson is offline   Reply With Quote
Old 09-23-2012, 11:18 PM   #14
t60
Member
 
Join Date: Jun 2010
Posts: 76
Rewards Points: 79
Default

Need to replace a main breaker, which one is correct?


Thanks -- No offense taken, it was just frustrating to read a response that says "replace the panel" with no reason provided. Now that you've provided information behind the recommendation, it makes more sense, but probably not something I'm willing to take on (time or budget-wise) right now, especially since it was recently replaced.
t60 is offline   Reply With Quote
Old 09-23-2012, 11:22 PM   #15
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,926
Rewards Points: 2,248
Default

Need to replace a main breaker, which one is correct?


You also need to make sure that the new breaker comes with, or you are able to reuse, the hold down kit.

__________________
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
Changing a breaker. Turn main power off first? noone Electrical 18 11-15-2011 08:08 PM
Main Circuit Breaker Question vladmir1111 Electrical 2 08-20-2011 09:15 PM
Main Breaker Melting rubberhead Off Topic 8 03-16-2011 08:50 PM
Main house breaker keeps tripping cosmicmah Electrical 20 01-22-2008 01:36 AM
Main Breaker Trips Repeatedly kkf Electrical 7 06-18-2007 05:31 PM




Top of Page | View New Posts

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