Code Compliance/junction Box Advice - Electrical - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 01-04-2009, 04:42 PM   #1
newer than a newbie...
Join Date: Mar 2007
Posts: 136
Rewards Points: 87

code compliance/junction box advice

Hi There.

We have a junction box in our basement furnace room (I believe that is what is called - the circle that is mounted in the joists and may sometimes have a light fixture hanging from it).

Basically, I have included what the junction box had, and according to this configuration, I would like to ADD the one that says "For possible link to light switch."

We moved into this home recently, and already, there were 4 black wires (hots) and 4 white wires (neutrals) joined in order to get
-the source power,
-the 2 receptacles and
-the light pull switch

I figured it would be nice to setup a light switch so that I can more easily turn on the light from a switch rather than the pull cable. I think I would need to run cable OUT of the junction box to the switch (on the wall) and then run cable INTO the junction box to be able to switch the light on and off. I've only shown the one cable going out of the box in my picture.

Obviously, there are going to be a lot of cables in this box if I plan on doing this! I'm in Ontario, Canada, and I am wondering if anyone knows if this is to code to have more than 4 wires going in or out of a junction box? Theoretically, there is room to squeeze wires on other sides, but there are typically only 4 holes to slip wires into.

Also, in this case, I will need to separate the light fixtures' hot/neutral cables and join them with separate romex screws (? is this the term?), to allow the switch to turn it off/on. Is this allowed to be done within a junction box? With this scenerio, there would be 4 of the romex screws covering the ends of the wires.

Any insight/advice would be appreciated.

Attached Thumbnails
code compliance/junction box advice-electrical-junction-box.jpg  


mcvane is offline   Reply With Quote
Old 01-04-2009, 05:21 PM   #2
Join Date: Oct 2007
Posts: 2,294
Rewards Points: 1,000

It's easier done than said

Is the box big enough? I don't know, I can't see it. Could I make it work? Yes, but that's what I do.

Run a two wire cable from the ceiling box to the switch box.

At the ceiling box, attach the white wire to the blacks.This sends the power down to the switch.

Install a short pigtail on the whites, It may already be present from the old fixture. This is your neutral connection for the light.

The black wire from the sw box goes to the hot wire/terminal of your fixture.

At the sw box, two wires, two terminals on the switch.

PS. Identify the white hots with black tape.

That is how it's done in the US. Is Canada different?????


Last edited by 220/221; 01-04-2009 at 05:25 PM.
220/221 is offline   Reply With Quote
Old 01-04-2009, 05:42 PM   #3
Join Date: Dec 2008
Location: Southern Wisconsin
Posts: 171
Rewards Points: 150

If all the wires in this box, except the fixture wires, are 12 AWG then the conduct fill would be 20.25 cubic inches. I guess it depends on the size wire and the size of the box, but you could run into a box fill violation (in the U.S anyway) Am I correct 220/221?
Steelhead is offline   Reply With Quote
Old 01-04-2009, 06:43 PM   #4
Electrical Contractor
kbsparky's Avatar
Join Date: Sep 2008
Location: Delmarva
Posts: 3,368
Rewards Points: 2,000

If your box appears to be too full for comfort, then you can utilize an extension ring to give you more room:

kbsparky is offline   Reply With Quote
Old 01-04-2009, 07:29 PM   #5
Join Date: Nov 2005
Location: Winnipeg, Manitoba
Posts: 1,298
Rewards Points: 802

Originally Posted by 220/221 View Post
Identify the white hots with black tape.

That is how it's done in the US. Is Canada different?????
That is how it is done up here, i always say back on black so that way your light fixture always has a black hot and white neutral and not two whites. You should colour the white black but i never do.

In my opinion if you see a white on a switch or white tied on with a group of blacks and you don't know that is your constant hot you should not being doing electrical work.
darren is offline   Reply With Quote
Old 01-04-2009, 09:39 PM   #6
Res Ipsa Loquitur
Join Date: Dec 2007
Location: Southeastern PA
Posts: 363
Rewards Points: 250

I like to keep a wide tip black Sharpie for those instances where I want to make a white wire a switch leg or "black wire". A few swipes along the white sheath does the trick for me.


Did you ever stop to think, then forget to start again?
handyman78 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
code details for boxes kama Electrical 6 01-30-2009 10:25 AM
Help With Code Violation pchicago Electrical 35 10-21-2008 02:23 PM
Advice from someone familiar with code enforcement/permits tnis0612 Building & Construction 28 09-18-2008 11:17 AM
Electrical Advice Caution!!! Mike Swearingen Electrical 12 03-05-2008 11:51 AM
Another Bryant 383KVA with code 31 problems rpgIVguru HVAC 1 02-05-2007 01:47 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1