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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-03-2012, 06:29 PM   #1
Newbie
 
Join Date: Sep 2012
Posts: 2
Share |
Default

Outlets testing at 180 hz


I had just changed an outlet and I noticed that the new outlet and several others nearby were testing at 179.9hz I know 60hz is common, but I haven't been able to find an answer as to why some are testing higher, or if this is something I should be concerned about.

Any answers would be greatly appreciated.

Sam151 is offline   Reply With Quote
Old 09-03-2012, 06:47 PM   #2
Member
 
Lavid2002's Avatar
 
Join Date: Jan 2012
Posts: 105
Default

Outlets testing at 180 hz


Quote:
Originally Posted by Sam151 View Post
I had just changed an outlet and I noticed that the new outlet and several others nearby were testing at 179.9hz I know 60hz is common, but I haven't been able to find an answer as to why some are testing higher, or if this is something I should be concerned about.

Any answers would be greatly appreciated.
What's the voltage on said outlets?

Lavid2002 is offline   Reply With Quote
Old 09-03-2012, 06:52 PM   #3
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,246
Default

Outlets testing at 180 hz


Why would you even be checking for HZ?
Instead of just polarity and voltage?
joecaption is offline   Reply With Quote
Old 09-03-2012, 06:58 PM   #4
Newbie
 
Join Date: Sep 2012
Posts: 2
Default

Outlets testing at 180 hz


Voltage is at 120.

I wasn't deliberately testing for hz, but did notice it and thought it strange. Any concerns?
Sam151 is offline   Reply With Quote
Old 09-03-2012, 07:00 PM   #5
JOATMON
 
ddawg16's Avatar
 
Join Date: Aug 2011
Location: S. California
Posts: 7,069
Default

Outlets testing at 180 hz


What are you using to measure the frequency?

Any chance you have a bunch of CFL's on that ckt? If so, the harmonics on from them could be making your cheap freq counter give you that freq. 180 Hz is 3x the natural freq of 60 Hz...

You would really need to look at it with an osciloscope to know for sure what is going on.
__________________
"The dream is free but the hustle is sold separately."

My 2-Story Addition Build in Progress Link ... My Garage Build Link and My Jeep Build Link
ddawg16 is online now   Reply With Quote
Old 09-03-2012, 07:09 PM   #6
Semi-Pro Electro-Geek
 
Join Date: Jul 2009
Location: Arizona, USA
Posts: 2,544
Default

Outlets testing at 180 hz


There's something wrong with the meter. It's measuring the third harmonic for some reason. There may be nonlinear electronic loads on that circuit (like the CFL's mentioned) that are adding a third-harmonic component, but the meter should still read the main 60Hz waveform, not the minor harmonic component.
mpoulton is offline   Reply With Quote
The Following 2 Users Say Thank You to mpoulton For This Useful Post:
rjniles (09-04-2012), Sam151 (09-04-2012)
Old 09-03-2012, 11:24 PM   #7
Member
 
Join Date: Sep 2011
Posts: 90
Default

Outlets testing at 180 hz


Like the other have said, you have a meter problem. Fluke is pretty much the gold standard in meters and I hear that Milwaukee is now making a good meter. You might try one of those.

Auger01 is offline   Reply With Quote
The Following User Says Thank You to Auger01 For This Useful Post:
Sam151 (09-04-2012)
Reply


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 Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2 wire outlets: connect neutral to ground? border collie Electrical 19 04-12-2013 12:29 PM
Grounding outlets... bigdaddyII Electrical 12 08-28-2011 02:22 PM
Supplemental Outlets in 1950's House Perry401 Electrical 2 05-01-2011 08:49 PM
testing phone outlets amakarevic Electrical 12 03-19-2010 12:18 PM
Testing Electrical Outlets Jack Watts Electrical 4 11-19-2009 05:39 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.