DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Electrical and Wiring > I don't know




Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 08-18-2014, 11:50 AM  
OreDux541
Junior Member
 
Join Date: Aug 2014
Posts: 3
Default I don't know

Can anybody tell these two apart



File Type: jpg 1408384224221.jpg (27.6 KB, 43 views)
__________________
OreDux541 is offline  
 
Reply With Quote Quick reply to this message
Old 08-18-2014, 12:18 PM  
bud16415
Fixer Upper
 
bud16415's Avatar
 
Join Date: Feb 2013
Location: Erie Pa, Pa
Posts: 1,027
Liked 292 Times on 230 Posts
Likes Given: 102

Default

Nope look the same to me?



__________________
bud16415 is online now  
 
Reply With Quote Quick reply to this message
Old 08-18-2014, 12:22 PM  
OreDux541
Junior Member
 
Join Date: Aug 2014
Posts: 3
Default

Right? Do I play the game of 50/50?idk

__________________
OreDux541 is offline  
 
Reply With Quote Quick reply to this message
Old 08-18-2014, 12:47 PM  
slownsteady
Supporting Member
HRT_SUPPORTER.png
 
slownsteady's Avatar
 
Join Date: Jun 2009
Location: Newton, NJ
Posts: 832
Liked 113 Times on 97 Posts
Likes Given: 141

Default

Well, if you are trying to wire a fixture and you are trying to determine which is hot: get a simple circuit tester (usually an led attached to two probes), touch one probe to the jbox and touch the other probe to each wire in turn. The hot wire will light the circuit tester when it makes contact. mark the hot wire by adding black tape to the insulation.

__________________

Last edited by slownsteady; 08-18-2014 at 04:48 PM. Reason: spelling
slownsteady is offline  
 
Reply With Quote Quick reply to this message
Old 08-18-2014, 01:10 PM  
bud16415
Fixer Upper
 
bud16415's Avatar
 
Join Date: Feb 2013
Location: Erie Pa, Pa
Posts: 1,027
Liked 292 Times on 230 Posts
Likes Given: 102

Default

Well if they are power to a light the switch is on, one will be hot and one not. If the switch is off both won’t have power. That’s when the power comes to the switch first like this one. The box looks like its plastic so you won’t see a good ground there with a tester that has two probes.

You could take a knife and scrape some of the paint off and see what color is below.

__________________
bud16415 is online now  
 
Reply With Quote Quick reply to this message
Old 08-18-2014, 01:39 PM  
OreDux541
Junior Member
 
Join Date: Aug 2014
Posts: 3
Default

You guys are awesome! I built a tester with a led, then also scraped a bunch of crap off of the wire jackets. Works great now

File Type: jpg 1408390763552.jpg (28.8 KB, 38 views)
__________________
OreDux541 is offline  
 
Reply With Quote Quick reply to this message
Old 08-18-2014, 02:16 PM  
Wuzzat?
Senior Member
 
Wuzzat?'s Avatar
 
Join Date: Jan 2010
Posts: 2,297
Liked 163 Times on 150 Posts
Likes Given: 88

Default

You need a known good ground to check which wire is hot. Use one conductor of an extension cord and clip leads as a test lead to a water pipe or BX shield or load center cover.

BTW, with the LED tester drawing so little current, a 'good ground' might be a screwdriver shaft stuck in the earth or water flowing out of a faucet.

__________________

Last edited by Wuzzat?; 08-18-2014 at 02:21 PM.
Wuzzat? is offline  
 
Reply With Quote Quick reply to this message
Old 08-22-2014, 05:30 AM  
speedy petey
Lic.Electrical Contractor
 
Join Date: Mar 2006
Posts: 436
Liked 32 Times on 23 Posts
Likes Given: 15

Default

Quote:
Originally Posted by Wuzzat? View Post

BTW, with the LED tester drawing so little current, a 'good ground' might be a screwdriver shaft stuck in the earth or water flowing out of a faucet.
OK
__________________
speedy petey is offline  
nealtw Likes This 
Reply With Quote Quick reply to this message
Old 08-22-2014, 11:18 AM  
Wuzzat?
Senior Member
 
Wuzzat?'s Avatar
 
Join Date: Jan 2010
Posts: 2,297
Liked 163 Times on 150 Posts
Likes Given: 88

Default

Quote:
Originally Posted by speedy petey View Post
I thought of giving you a homework assignment involving calculating the current draw of LED testers but I think this assignment will do you much more benefit.

Using this search
http://www.google.com/search?client=safari&rls=en&q=laugh+denial+%22defe nse+mechanism%22&ie=UTF-8&oe=UTF-8
figure out the connections between my post and your conduct.

It's an open-book test and you can ask others if you need.

Post back if you want a grade on your comprehension of this concept.
__________________

Last edited by Wuzzat?; 08-22-2014 at 11:21 AM.
Wuzzat? is offline  
 
Reply With Quote Quick reply to this message
Old 08-22-2014, 12:39 PM  
kok328
Supporting Member
HRT_SUPPORTER.png
 
Join Date: Nov 2007
Location: Grand Blanc, MI
Posts: 2,170
Liked 101 Times on 89 Posts
Likes Given: 61

Default

You do realize that your wires could be backwards and the light will still work ?
For a safe installation, you need to know which one is hot.



__________________
kok328 is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 On
Refbacks are On