Running through a panelboard

[elohr46]

Yea I get that one but Celtic was reffering to 277v lighting and 120v recepts in a typical commercial environment. I would never do this because I think it is never necessary, practical and is a accident waiting to occur. In my beggining our 480v/277 cts were always in seperate conduits. except for control circuits. Just because you can does not mean you should. Is there a big savings doing so?

For me it's become a habit over the years to keep 120v recept. circuits out of 277v lighting conduits because most of the time it is in the commercial job specs to keep them seperate.

 

[celtic]

Then there are the times 480 volt breakers use 120 volts for control power, kind of necessary to bring both voltages into a panel cabinet.

Yea I get that one but Celtic was reffering to 277v lighting and 120v recepts in a typical commercial environment.

It is the same scenario...just different points of termination.

I would never do this because I think it is never necessary, practical and is a accident waiting to occur.

Working with electricity, in general, is an accident waiting to happen...having people that understand what is legal/is not legal minimizes that danger.

Never assume shutting of a panel feeder kills all circuits in a cabinet.

It's a pretty basic concept.

Just because you can does not mean you should. Is there a big savings doing so?

"Can" and "should" are arbitrary terms that typically do not enter into a client's mind.
The clients' concern for the most part is "how much?".

The savings would based strictly on the task at hand...each will vary.
The savings becomes instantaneous when "someone" forgets/adds an item of a different voltage way over there someplace and there just happens to a conduit with some extra room over here

 

[e57]

I haven't talked directly to the inpsector, I going by what the electrician said. Actually, the electricians were the first ones to say "you can't run through a panel to another panel." I'm not sure they believed me when I told them that wasn't actually a code section.

Steve

IT IS A CODE SECTION!!!! It just says a lot more than that.... It says you can in certain conditions. And since you're not in the field - how do you know if they violated it or not? Or if the inspector was enforcing what he 'remembers' of the code - rather than opening the book to look?

However - although allowed under the right circumstances - not a great practice IMO.

 

[Flex]

IT IS A CODE SECTION!!!! It just says a lot more than that.... It says you can in certain conditions. And since you're not in the field - how do you know if they violated it or not? Or if the inspector was enforcing what he 'remembers' of the code - rather than opening the book to look?

However - although allowed under the right circumstances - not a great practice IMO.

Just because he CAN doesnt mean he SHOULD

 

[e57]

Just because he CAN doesnt mean he SHOULD

I think thats what I said... :roll:

 

[hurk27]

I had an inspector hit me for this once stating the same thing that turning off one panel you will still have live conductors, he said I should install a trough under the panels and run through it.

I had to ask him, if turning off one panel was going to remove all the power in the trough? he put a green sticker on the service and left

 

[mcclary's electrical]

I had an inspector hit me for this once stating the same thing that turning off one panel you will still have live conductors, he said I should install a trough under the panels and run through it.

I had to ask him, if turning off one panel was going to remove all the power in the trough? he put a green sticker on the service and left

Good point,,,,and if you turn off a main,,,,the feeders are still hot,,,,,so what's his point?