I think what I remember :grin: is that you will find the shorter marking on panels that allow some combination of circuit breakers with or with out the use of handle ties that when the board is filled equal not more than six throws...
Hmmm... what exactly is meant by an outbuilding in the exception to 250.36??? Is it the same as what in days past what was referred to as an outhouse???? Or does it mean any buiding which is not the primary dwelling building of the residency and not a garage?The panel would have to be service rated without a main and while I have seen such panels for large commercial use I don't think you will find a 'load center' that has a service rating without a main. Of course you could use a service rated disconnect ahead of the main lug panel. :smile:
So almost anything is a structure.
Will this not attract lightning? Of course you are in AZThey are usually installed on a couple pieces of rigid driven into the ground and attached with pipe clamps
In my area, the AHJ's use a more conservative definition of the word.
We are allowed to install pool panels (for example) without ground rods. *1 They are usually installed on a couple pieces of rigid driven into the ground and attached with pipe clamps. *2 I have attached a few to block fences and it wasn't considered a structure. *3
Lee Trevino got hit by lightning and he is not much more than 36" tall. He also doesn't have rods in the ground that he is connected to.
Good point!The term 'service rated" has been used which is not correct.
Service equipment is rated Suitable for Use as Service Disconnect" meaning it has a main bonding jumper that can be installed, allowing to be used as a "sub-panel, or surface-panel, where the neutral is not allowed to be bonded. "Suitable for use a service disconnect only" means the equipment can only be used where the neutral is bonded, and can't be used as a
"sub-panel, or surface-panel, or feeder panel.
A surface panel is one that is not used on a sub.
I make the above comment to clarify we get into trouble when we use terms that are not defined in the NEC, for example see the definition of Structure.
I understand only one ground conductor on a ground clamp . However in the area we need to drive a ground rod there's alot of under ground conduit and we will surely hit one . I plan on grounding to the building steel but I was wondering is it legal to attach another ground clamp to the existing ground rod.
Thanks for any feed back