Four #12's

[chris kennedy]

I am installing some of these cans. The Jbox is marked max 4 #12's. The actual inside measurements of the box are 1?"?4?"?3?".

1?"?4?"?3?"=23cubes.

23cu/in?2.25=10 #12's.

How did they come up with a max of 4?

 

[celtic]

I am installing some of these cans. The Jbox is marked max 4 #12's. The actual inside measurements of the box are 1?"?4?"?3?".

1?"?4?"?3?"=23cubes.

23cu/in?2.25=10 #12's.

How did they come up with a max of 4?

I think you may have misread the instructions/fill:

? UL Listed for through branch
circuit wiring (maximum 8
No.12 ga., 90?C conductors).

http://www.cooperlighting.com/specfiles/pdf/Halo/H1499ICspecsheet.pdf


I think I have some of those cans laying around...lemme go check

PLEASE STAND BY......

 

[frizbeedog]

How did they come up with a max of 4?

Mabey 4 cables?

 

[frizbeedog]

Mabey 4 cables?

18 cubes for 8 conductors.

 

[chris kennedy]

Hang on, it says connectors, not conductors.

 

[frizbeedog]

Hang on, it says connectors, not conductors.

dude! .

 

[480sparky]

18 cubes for 8 conductors.

Plus 2.25 for the grounds = 20.25 in?. Still would fit!

 

[chris kennedy]

Is this a typo? Connectors suitable for 90?C?

 

[Dennis Alwon]

Is this a typo? Connectors suitable for 90?C?

I think the way it is written is very poor. They are saying there is a max. of 4 connectors-- translated 4 12/2 cables not 4 #12 conductors. The 90C obviously is referencing the #12

 

[chris kennedy]

I think the way it is written is very poor. They are saying there is a max. of 4 connectors-- translated 4 12/2 cables not 4 #12 conductors. The 90C obviously is referencing the #12

So I can figure conductor fill as per 314.16?

 

[Dennis Alwon]

So I can figure conductor fill as per 314.16?

I still think you are limited to 4 12/2 cables or the equivalent-- it should be the same as 314.16 or purtie close.

 

[480sparky]

So I can figure conductor fill as per 314.16?

I would think the labeling would over-ride the NEC since it's more restrictive in this case.

I don't think you can multiply the dimension of a known jbox and use it to calculate box fill
Take a standard 4x4x1?. Works out to 24in?. But T314.16(A) states the volume as 21in?.

 

[celtic]

The spec on my cans are a bit different:

Close up:

I don't know if you can see it...says (6) #14s :-?


Under that sticker, it's back to 8 #12s [again, crappy cell shot, sorry if you can't read it]

The instructions that come with the can make no mention of wire fill

 

[chris kennedy]

I still think you are limited to 4 12/2 cables or the equivalent-- it should be the same as 314.16 or purtie close.

Yup, and I agree with your earlier post, poorly written.

I would think the labeling would over-ride the NEC since it's more restrictive in this case.

110.3(B)?:smile:

I don't think you can multiply the dimension of a known jbox and use it to calculate box fill
Take a standard 4x4x1?. Works out to 24in?. But T314.16(A) states the volume as 21in?.

Those are outside dimensions.

 

[celtic]

I would think the labeling would over-ride the NEC since it's more restrictive in this case.

I agree....BUT...if one is suing #12s and the label says "Max (6) #14s" then what?

6 #14s = 6 x 2.00 = 12cu. in.
12cu. in/2.25 = 5 #12s ?

That JB is HUGE ...so much for running a 3 wire NM to save money or for switching purposes.

2 #14/3 = 7

 

[LarryFine]

I don't think you can multiply the dimension of a known jbox and use it to calculate box fill
Take a standard 4x4x1?. Works out to 24in?. But T314.16(A) states the volume as 21in?.

I bet you could if you used the actual interior dimensions, and not the box's nominal size.

 

[chris kennedy]

That JB is HUGE ...

Well, I'll pack em' full, if the cover doesn't pop off when I close it, I'm golden.:grin:

 

[celtic]

Well, I'll pack em' full, if the cover doesn't pop off when I close it, I'm golden.:grin:

I would go with a plastic one

 

[480sparky]

I would go with a plastic one

Geez, that's so..... old school!

http://i214.photobucket.com/albums/cc172/480sparky/Tools/press.jpg

 

[hillbilly1]

"Conductors" and "Connectors" are hard to translate in Chinese.:roll: