Wire Passing Through A J-box In A Conduit Run - Electrical - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical


Thread Tools Display Modes
Old 05-20-2010, 09:51 PM   #1
Join Date: May 2008
Location: Apple Valley, MN, USA
Posts: 1,003
Rewards Points: 508
Send a message via AIM to theatretch85

Wire passing through a J-box in a Conduit run

Re-wiring my garage right now with all surface mount conduit for the lighting and garage door power. My questions is regarding the wire that passes through certain j-boxes without being connected to anything in that box (never any need to tap off some wires). Am I required to pull a loop for these wires even if i never need to tap into them at these certain boxes, or can I pull them straight through the box to cut down on the amount of wires inside the box? I really only have 2 or 3 boxes where this may be a problem at.

Also, to the experts who have mastered bending conduit - I know I am fairly competent with bending and installing conduit, and the other day I had a bend that I was sure I measured properly and used the right markings on the bender, but when I was done, the distance between the two bends was 2 3/4" longer than I needed it to be. In this particular case I was running 1/2" conduit on the ceiling parallel to the wall, it bends towards the wall on the ceiling, then down the wall to a switch box. The distance that was too long was between the two bends. I used the arrow on the bender in both bends, but wondering if maybe I should have used the star for the second bend. Anyone know how I was off by 2 3/4"? (I've already "fixed" it by cutting the pipe and putting in a coupler, just curious for future reference).


theatretch85 is offline   Reply With Quote
Old 05-20-2010, 10:10 PM   #2
Master Electrician
Join Date: Mar 2010
Location: Indiana
Posts: 3,854
Rewards Points: 3,964

Unused conductors may just pass through.
Should have used the star.


brric is online now   Reply With Quote
Old 05-20-2010, 10:54 PM   #3
Union Electrician
goose134's Avatar
Join Date: Nov 2007
Location: Chicago, USA
Posts: 615
Rewards Points: 500

For a back to back bend, you need to use the star if the first bend is 'behind' the bender when you make the second bend. If you keep them both in front, you can you use your standard deduct.
Bear in mind, with back to back 90's, you really cant use the turn around method on measurements less than 18" or so. The handle will hit the first 90 before you're done with the second.
At least you're aware of what you're doing. Keep it up.

I've had a little bit of practice:
goose134 is offline   Reply With Quote
Old 05-21-2010, 07:22 PM   #4
Join Date: May 2008
Location: Apple Valley, MN, USA
Posts: 1,003
Rewards Points: 508
Send a message via AIM to theatretch85

I figured it was something simple, good to know for the future. I might end up bending some conduit down the wall later for some outlets should I decide I need some outlets in a spot I haven't planned on yet.

theatretch85 is offline   Reply With Quote
Old 05-22-2010, 03:56 AM   #5
" Euro " electrician
frenchelectrican's Avatar
Join Date: Apr 2006
Location: WI & France { in France for now }
Posts: 5,369
Rewards Points: 2,000

Most case for pass thru only the conductors can be non looped { just straight shot } unless you will plan to do with something in future then loop it most case I just loop it and few time down the road it come handy.

Now for the benders most of them I useally see use the star point for bending the arrow point is tricky to deal with it.

I am pretty much in the same boat as Goose134 is so I am used with North Americian and European ways.

frenchelectrican is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
What type wire to use from transfer switch to outdoor outlet brjl Electrical 32 11-20-2013 08:36 AM
Question about outdoor panel, conduit and derating wire pttcc Electrical 10 02-15-2010 10:51 AM
Mixing 12 and 14 wire in conduit? Quickdraw Electrical 80 04-19-2009 11:24 AM
Conduit for #6 wire joey b Electrical 13 11-22-2008 12:13 PM
adding new outside outlets, lights etc walt1122 Electrical 8 08-23-2007 02:11 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1