Go Back  DoItYourself.com Community Forums > Electrical, AC & DC. Electronic Equipment and Computers > Electrical - AC & DC
Reload this Page >

what scews needed to attach mounting strap to electrical box?

what scews needed to attach mounting strap to electrical box?

Reply

  #1  
Old 08-22-19, 06:06 PM
Member
Thread Starter
Join Date: Nov 2007
Location: USA
Posts: 249
Received 1 Vote on 1 Post
what scews needed to attach mounting strap to electrical box?

I have two CARLON Carlon 1-Gang Blue Plastic Interior New Work Standard Round Ceiling Electrical Box. I don't know what screws are needed to attach the mounting strap to the box. I don't know whether the holes for mounting a strap are threaded. Can someone shed some light on this?

If the holes are threaded and I damage the threading in it, could I use a generic screw, such as general purpose metal or wood screws and force them in?
 
Sponsored Links
  #2  
Old 08-22-19, 06:44 PM
Tolyn Ironhand's Avatar
Group Moderator
Join Date: Nov 2007
Location: Twin Cities, MN
Posts: 12,933
Received 54 Votes on 47 Posts
That should have come as a single assembled part. But any screw should work.
 
  #3  
Old 08-22-19, 06:57 PM
pcboss's Avatar
Forum Topic Moderator
Join Date: Jul 2002
Location: Maryland
Posts: 14,911
Received 24 Votes on 20 Posts
Round boxes use 8-32 screws.
 
  #4  
Old 08-22-19, 07:13 PM
Tolyn Ironhand's Avatar
Group Moderator
Join Date: Nov 2007
Location: Twin Cities, MN
Posts: 12,933
Received 54 Votes on 47 Posts
Round boxes use 8-32 screws.
They are asking about the screws to mount the box to the mounting strap, not a fixture tot he box.
 
  #5  
Old 08-23-19, 05:05 PM
Member
Thread Starter
Join Date: Nov 2007
Location: USA
Posts: 249
Received 1 Vote on 1 Post
Thanks for the replies. I went to the local hardware and bought four 8-32 screws, 1/2" long, and got the job done. They were not easy to screw into the holes on the box but I got them in.
 
  #6  
Old 08-23-19, 07:41 PM
Member
Join Date: Nov 2015
Posts: 1,194
Received 15 Votes on 14 Posts
That is just shelf tapping metal screw. Not sure what size to use, probably #8.

8-32 is a bolt and the strap is not threaded. If you get it in without stripping the threads, you are probably ok. But if the threads are stripped in the process, it will be very weak.
 
  #7  
Old 08-24-19, 10:01 AM
Member
Thread Starter
Join Date: Nov 2007
Location: USA
Posts: 249
Received 1 Vote on 1 Post
The "strap" in this case is a circular strap. And, it has many holes, both threaded and not threaded. 8-32 screws work in the threaded holes in the strap.

Edit: Regarding the screw holes in the ceiling electrical box, I believe they are designed for 8-32 size screws but I believe, in the case the plastic boxes, the holes are not threaded. So, you're basically threading the hole as you put the screw in. This would explain why the resistance to getting the screw tightened rapidly increases as the screw is being screwed further in.
 

Last edited by dderolph; 08-24-19 at 10:41 AM. Reason: Added paragraph
Reply

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


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: