Listed holes for the GEC in electrical cabinets

[BostonPedro]

Hello all. I have a multi tiered question
Its my understanding that the 1/4 or 5/16 hole for panel cabinets and meter banks are listed and approved for the entry of the GEC conductor by manufactures thus making them legal.
What if an electrician drills his own hole because of circumstances not allowing the listed manufactured hole to be used. Is the hole that the electrician drills out illegal because it is not listed?
If one says it is legal then why would a "hole" have to be listed specifally for use of the GEC in the first place?
If one says it is illegal then why do you think that?

 

[LarryFine]

Pedro, welcome.

I'd say legal, just as we can make a hole almost anywhere in almost any enclosure as necessary.

 

[electrofelon]

Hello all. I have a multi tiered question
Its my understanding that the 1/4 or 5/16 hole for panel cabinets and meter banks are listed and approved for the entry of the GEC conductor by manufactures thus making them legal.
What if an electrician drills his own hole because of circumstances not allowing the listed manufactured hole to be used. Is the hole that the electrician drills out illegal because it is not listed?
If one says it is legal then why would a "hole" have to be listed specifally for use of the GEC in the first place?
If one says it is illegal then why do you think that?

Recent thread on same/similar topic, might be worth a peruse...

http://forums.mikeholt.com/showthread.php?t=188549

 

[BostonPedro]

Thanks for the welcome.
I agree that we make holes in cabinets but then we fill that hole with a listed connector for whatever we are bringing into the cabinet so in the end we are using a listed and approved means. Now if we forgo using the manufactures listed and approved GEC conductor hole and drill out our own we would not be using an approved means anymore, correct?

 

[LarryFine]

I agree that we make holes in cabinets but then we fill that hole with a listed connector for whatever we are bringing into the cabinet so in the end we are using a listed and approved means.

My opinion is that a bare GEC does not require a connector, so there is no "listed and approved means" that we would be failing to use.

Now if we forgo using the manufactures listed and approved GEC conductor hole and drill out our own we would not be using an approved means anymore, correct?

I disagree. Just as our field-drilled KO is equivalent to a factory-punched KO, our field-drilled GEC hole would be interchangeable with a factory-punched GEC hole.

 

[jumper]

Welcome,

Please read the link posted above and the responses given in this post also.

You can also search for similar threads here and other forums.

I feel that maybe this thread was opened for possibly ulterior motives.

I am closing it.

Derek