Short Story - Safety - Electrical - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 10-14-2009, 09:47 AM   #1
Join Date: Aug 2009
Posts: 33
Rewards Points: 25

Short story - safety

I added an overhead light to a room yesterday, there was no light in the room before, only a switched outlet. I used an "old work" ceiling box and ran a wire from it, to the switch box on the wall. (Minimal drywall work, since the floor above is being remolded - I found the top plate up there and was able to hit the box from above)

Once the switch was installed, I turned the breaker on and went back upstairs to flip the light on. When I flipped the switch, there was a pop sound from the switch box, and the breaker tripped.

I knew that the problem was with the new wire that I ran, because I didn't come into play, until I flipped the switch.

The problem was right in the metal switch box - the built-in cable clamps can have sharp edges, and one of them nicked the insulation on the hot wire going to the light fixture.

1. watch those sharp edges and protect wire insulation jackets
2. make sure your metal boxes are grounded
3. make sure your wiring boxes are sealed to contain the large arc that occurs with a short to ground

This was a simple job and a simple fix, but that's what made it an eye opener, don't get complacent.

Stay safe.


OffRoadAudio is offline   Reply With Quote
Old 10-14-2009, 10:13 AM   #2
300zx's Avatar
Join Date: May 2009
Location: Florida
Posts: 630
Rewards Points: 500

Short story - safety

we use plastic 1/2 or 3/4 gromets and ground your metal box like you said .


300zx is offline   Reply With Quote
Old 10-14-2009, 12:37 PM   #3
Join Date: Jun 2007
Posts: 3,585
Rewards Points: 2,158

Short story - safety

Or use plastic boxes when you can.
J. V. 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
Adding a second story to my ranch jpmildge Building & Construction 18 12-11-2009 11:40 AM
2nd story bathroom, drain &vent, please help!!! serik Plumbing 4 07-15-2009 08:33 AM
A story of a high amperage short Gigs Electrical 17 11-16-2008 07:36 PM
Construction safety nightmare 'Andyman Off Topic 2 09-13-2005 12:20 PM

Top of Page | View New Posts