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#94209 - 07/18/05 11:11 AM pipe fill
watersparkfalls Offline

Registered: 03/08/05
Posts: 210
Loc: Washington...Not DC
will a 6-3 romex fit in a 3/4" pvc?
not sure how to calculate the 53% single conductor.


2014 / 2011 NEC & Related Books and Study Guides
#94210 - 07/18/05 01:19 PM Re: pipe fill
George Offline

Registered: 02/23/02
Posts: 380
I believe for Southern Wire Corp the diameter is .683".

#94211 - 07/18/05 01:47 PM Re: pipe fill
winnie Offline

Registered: 09/15/03
Posts: 652
Loc: boston, ma
Take the largest diameter across the cable. Calculate the cross section area is if the cable were round with this diameter. (PI*D^2)/4

Divide this by the internal area of the conduit. If the answer is less than 0.53, you are good to go.


#94212 - 07/18/05 05:09 PM Re: pipe fill
Electric Ian Offline

Registered: 02/10/04
Posts: 132
Loc: MA, USA
Looks like you need to go to 1"

assuming .683 diameter:

Area = Pi*r^2 = 3.14*.3415^2 = .366
assuming sched 40 PVC:
max allowable 53% fill area for 3/4" is .269 (too small)
max allowable 53% fill area for 1" is
.441 (that'll work)

#94213 - 07/18/05 11:04 PM Re: pipe fill
watersparkfalls Offline

Registered: 03/08/05
Posts: 210
Loc: Washington...Not DC
thanx guys....



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