Old breakers not tripping

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dmagyar

Senior Member
Location
Rocklin, Ca.
Keeping old breakers & left over materials

Keeping old breakers & left over materials

NewOnMyOwn, Just like every open or unused space, you'll eventually fill it up. Another thing with excess inventory, it can obscure what you're trying to find for the job at hand. Just as in the earlier post from "Zog" without the equipment to test those "Old" breakers what you install may or may not work. Sell the old, seemingly good breakers if possible, throw out the junk, buy them back when and if you need them. I end up purging materials from "stock" every year where the possibilities for their use has diminished over time.

I once worked for a foreman who would check the rolling carts that each of the crew used to transport/work from as we went about our day. If he saw that your cart had mixed boxes of materials, he'd dump over the cart on the floor, "Now start over". It got the message across that sorting, looking for materials eats up time, which is money. The better organized you are, hopefully the more profitable you'll become.
 

jaylectricity

Senior Member
Location
Massachusetts
Occupation
licensed journeyman electrician
You have evidence other that hearsay regarding this statement.

Yes, but when I tell you it will only be hearsay if you tell somebody else, right? Or does everybody in the world need to see the evidence first hand before they are allowed to believe something?

It happened in this building. The lady had a light switch that wasn't mounted to its metal box. The terminals of the switch made a connection with the metal box, there was an extremely large flash. But her FPE breakers that are located inside the aparmnet didn't trip. The main breaker (Murray 100 amp) tripped down in the electrical room, some 100 feet away.
 

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
...

It happened in this building. The lady had a light switch that wasn't mounted to its metal box. The terminals of the switch made a connection with the metal box, there was an extremely large flash. But her FPE breakers that are located inside the aparmnet didn't trip. The main breaker (Murray 100 amp) tripped down in the electrical room, some 100 feet away.
That is not uncommon with all brands of breakers that have instantaneous trip functions. All of the breakers in the circuit see the full current and often the instantaneous trip curves overlap. Either or both breakers may trip to clear the fault.
 

brian john

Senior Member
Location
Leesburg, VA
I have an honest question for you.

You have evidence other that hearsay~ that the Earth is round?

Yes I do. Scientific evidence.

I test circuit breakers old and new and in small molded case it is my belief the failure rate between manufactures is about the same.

As I have stated before I was involved in the FPE recall and the reason for the recall was not a failure to trip.
 
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