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CJMEDINA 02-09-2010 04:17 PM

Procedure for replacing MAIN CIRCUIT BREAKER?
I need to replace my main 100 Amp Murray MAIN Breaker.

I was told I would have to call the electric company so that they would un_tag the meter so I could disconnect from the main.

Whats the procedure?



Rory Read 02-09-2010 04:26 PM

if it was my home
I truly would call an electrician. I don't mean to be unhelpful, but I don't want to die, and I don't want any clients passing on too soon either (especially in this business environment).

If it was my home, and there was a shutoff, and my wife was out of town, I might consider it...but it's not really the right end of the system to start learning on.

Good Luck,


RDG Read Development LLC
Portland, OR

HouseHelper 02-09-2010 04:38 PM


Originally Posted by CJMEDINA (Post 397164)
I need to replace my main 100 Amp Murray MAIN Breaker.

I was told I would have to call the electric company so that they would on tag the meter so I could disconnect from the main.

Whats the procedure?



Contact the power company and ask for a disconnect so the work can be done... you may have to have the work inspected before they will re-connect... which means a permit will have to be pulled.

CJMEDINA 02-09-2010 04:46 PM

I know a friend of mine had done this before and he is not a electrician. I think they cut the tag on the meter but I'm not sure if he pulled the meter or they did and reconnected later after the Main was replaced.

I live in central New Jersey PSE&G


micromind 02-09-2010 05:05 PM

At some point you'll need to deal with the power co.

Call and tell them you need to replace your main breaker. Ask if they need the city/county/state to sign it off before they'll re-connect. Around here, if it's a simple replacement of a breaker, they will re-connect without a permit. A lot of areas are different.

Once the service is dead, replacing the main is not all that difficult.

I've been doing mostly commercial/industrial electrical for 20 years, and work a LOT of stuff hot. Usually at more than 120/240 volts. I very seriously doubt if I'd replace a residential main breaker hot though. The mains in those panels are just not made to be worked hot.


SULTINI 02-09-2010 05:12 PM

That's one way of doing it but I wouldn't recommend doing that if you are
not familiar with electric and panels.

I don't recommend cutting the seal on the meter and pulling it there are certain things you must know before proceeding.

eagle09tbl 02-09-2010 05:49 PM

Many of these guys have been doing electrical work much longer than me so listen to them, please. I've worked in it for 20 years now, but it simply isn't worth the risk to try and do that type of job without proper training. Replacing the main breaker isn't hard but proper safety precautions are necessary to do the job correctly.

Call the power company, have the meter removed, replace the breaker and they can re-install the meter. If your area requires a permit, get it. Better safe than sorry. If you aren't comfortable doing it yourself, call a licensed electrician and have them perform the work for you.

micromind 02-09-2010 06:55 PM

Sultini is right, don't cut the seal and pull the meter unless the power co. says it's OK. It's actually a federal crime if they want to push it.


Scuba_Dave 02-09-2010 09:39 PM

Are you thinking of taking the 100a breaker out & putting a 200a in ?

That will not work
Panels are rated for amps also
You will need a 200a panel

Speedy Petey 02-10-2010 06:56 AM

CJMEDINA, I agree with Scuba. What are you trying to do here???

Here you are asking about replacing a main breaker. You have another thread showing a perfectly good main breaker, and asking if 100A entrance cables will support 200A.

Sounds like you are trying to rig some mess instead of doing a proper service upgrade.
What's the story???

SULTINI 02-10-2010 07:19 AM

I agree with SCUBA and Speedy something sounds dangerous for which you are about to do.

After checking prior questions.

CJMEDINA 02-10-2010 08:06 AM

No,....two separate things here.

I was thinking of replacing the load center.

If I already have a 200 Amp capable supply line then I can just buy a 200 Amp load center However I'm not sure if I stay with the 100 Amp box I have now.
I think I can change 2 circuits to double breakers to free up for a double pole 240V slot.
The main breaker has to be replaced because a friend replaced the Main over a year ago but used a square D instead of a Murray breaker! The breaker is not square in the slot but is making solid contact.


Gigs 02-10-2010 08:36 AM

If you are going to get the power pulled to replace the main, you could replace the whole panel. But like people were saying in the other thread, if you can possibly afford it, an electrician would be the way to go here.

Thurman 02-10-2010 09:29 AM

I would certainly check with local POCO before even buying anything. Around her, three different power supplier's, ALL require to see and record the electrician's license number and the electrician and POCO employee sign off on a meter pull. Every instance I've witnessed, the meter puller actually states loudly "Meter on the ground", just before they place it in a tool box made for meters on the truck. Don't let the "Meter Man" go to lunch and your ten minutes from finishing--- David

longbeach1125 02-10-2010 10:43 AM

If you had to do this. You would have to pull the meter out. , Is there a lock on it? If its only a tag I would cut it off. I might even cut the lock off, depending on which one it is, you might be able to use a dremel tool on the hinge part of it. Be very careful not to break the glass on the meter. :)

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