The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Members: Did you know?
by Admin
37 minutes 25 seconds ago
Safety at heights?
by HotLine1
Yesterday at 08:51 PM
International Wire Colour Codes
by Texas_Ranger
Yesterday at 03:29 PM
Looking for older post
by Texas_Ranger
Yesterday at 03:22 PM
Last time to chat here
by Trumpy
01/20/17 11:41 PM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
Admin 36
HotLine1 20
Ruben Rocha 17
gfretwell 16
Trumpy 15
Who's Online
1 registered (Admin), 81 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#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.

2017 / 2014 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....


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals