stickboy1375
Senior Member
- Location
- Litchfield, CT
not to mention the sheet rock hanger was pretty precise!
Encountered my first one last month, did not know what it was. Now I see it must be back east electricians bringing their right-coast wiring methods with them.I have seen plenty of boxes installed with 10D nails going through it like some kind of ancient torture devise.. :lol:
We usually just visit the wrong coast.:lol: Wouldn't bring any materials with us.Encountered my first one last month, did not know what it was. Now I see it must be back east electricians bringing their right-coast wiring methods with them.
Yup, that used to be the 'normal' way it was done. That is why the NEC specifically forbids the use of screws 'inside' the box- fear the exposed threads would cut the insulation.
Yeah but if one wire eat's up 2.25 cubic inches then those two nails should be good for a total of about 4.50 cubic inches of fill.
Actually, two 1/8 inch diameter nails would take up about 0.06 cubic inches, considering a 2 1/2 inch wide box.
The 2.25 cu. in. (for 12AWG) is the amount of free space required by 314.16(volume allowance), not the amount of space the wire takes up. Volume allowances don't apply to nails.
I understand how it works, my point was that if a 3x2x2 box is 12 cubic inches and you have three wires and a device, I'm assuming there's a device, that doesn't leave much room.
And from which table did you get the 0.06 from?
Oh and no one is going to mention the missing KO seal?
For the boxes designed for the nails to go through them since they are so close to the back of the box they don't take up much room.
I didn't get the 0.06 from a table. I assumed a 1/8 inch diameter nail, 5 inches total length (2 nails, 2 1/2 inches each) and just did the math (V=H pi R squared). So .0625 sq = .0039062. That times pi = .0122654 and that times 5 = 0.061327
Edit - 0.06 isn't correct. I made an order of operations error. The correct answer should be 0.19257
And how did you use pi R squared when the nails are round?:dunce: It's pi R round, cake R square.