Box Fill Calculation

[robr]

Where in the NEC does it state or tell you how to determine the fill calculation of larger boxes. For example a 6"x6"x4" box??? Thank you for your assistance.

 

[wmeek]

Re: Box Fill Calculation

Check Article 314. Table 314-16(B)

 

[robr]

Re: Box Fill Calculation

Thanks but this does not cover this size of box. is there a way to determine this with a formula??

 

[roger]

Re: Box Fill Calculation

Rob look at all of 314 specifically 314.28 and 314.70

When you go to boxes of this size you will need to know conduit entry sizes and how they enter the box.

Roger

 

[john p]

Re: Box Fill Calculation

try looking at 314-28 A,1,2 I believe this will tell you.

 

[john p]

Re: Box Fill Calculation

Also look at 314.71 A,&B for over 600Volt Sytems