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 09-22-2010, 08:49 PM   #1
Newbie
 
Join Date: Sep 2010
Posts: 3
Rewards Points: 10
Default

Voltage Problem


This evening I decided to install a new light fixture in my backporch and found a voltage problem as described below.

1. Voltage between hot wire and ground, breaker on and light switch off
1 volt.
2. Voltage between hot wire and neutral, breaker on and light switch off
1 volt
3. Voltage between hot wire and neutral, breaker on and light switch on
120 volts.

Why is there 1 volt remaining on the first two when in fact there shouldn't be any? Any help would greatly be appreciated, thanks

H. Bruce is offline   Reply With Quote
Old 09-22-2010, 09:17 PM   #2
nap
You talking to me?
 
nap's Avatar
 
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
Rewards Points: 2,000
Default

Voltage Problem


are you using a digital multimeter (DMM)? If so, you likely have "phantom voltage". It isn't really phantom but an induced voltage with such a low current capacity it is basically disregarded.

nap is offline   Reply With Quote
Old 09-22-2010, 10:25 PM   #3
" Euro " electrician
 
frenchelectrican's Avatar
 
Join Date: Apr 2006
Location: WI & France { in France for now }
Posts: 5,369
Rewards Points: 2,000
Default

Voltage Problem


Nap have the point if you have ditgal Voltmeter they can pick up ghost voltage by induction of other conductors.

If you have a indentscent bulb hooked up you will read zero as you highlight first two parts.

Merci.
Marc
frenchelectrican is offline   Reply With Quote
Old 09-23-2010, 09:41 PM   #4
Newbie
 
Join Date: Sep 2010
Posts: 3
Rewards Points: 10
Default

Voltage Problem


I do not have a digital multimeter, I'm using one with a meter on it. Thanks to both of you for answering. Will I just go a head and install
the new light fixture, but what about that 1 volt? Will it not cause a problem?
H. Bruce is offline   Reply With Quote
Old 09-23-2010, 09:43 PM   #5
" Euro " electrician
 
frenchelectrican's Avatar
 
Join Date: Apr 2006
Location: WI & France { in France for now }
Posts: 5,369
Rewards Points: 2,000
Default

Voltage Problem


Quote:
Originally Posted by H. Bruce View Post
I do not have a digital multimeter, I'm using one with a meter on it. Thanks to both of you for answering. Will I just go a head and install
the new light fixture, but what about that 1 volt? Will it not cause a problem?
naw I don't think so as long you hook them up in correct way.

Some of the voltmeter can be supersenstive that why sometime can get false reading.

Merci.
Marc
frenchelectrican is offline   Reply With Quote
Old 09-24-2010, 01:14 PM   #6
Newbie
 
Join Date: Sep 2010
Posts: 3
Rewards Points: 10
Default

Voltage Problem


Thanks "frenchelectrican" and "nap" for the information and help I certainly appreciated it. I always thought for induction to be involved the wire had to be in the form of a coil such as a transformer.

I scrolled down the page and see a similar posting or thread ,"small voltage on circuit with breaker off ", by jasonmechler (24 aug 09).

Thanks to all and good afternoon from Eastern Canada.
Bruce

H. Bruce is offline   Reply With Quote
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
Very Strange Shower Drain Problem MattWhite Plumbing 12 05-21-2011 12:53 PM
Ceiling Fan Circuit Problem G_S_DB Electrical 1 08-25-2010 07:24 PM
Voltage Low Throughout House timjfisher Electrical 4 08-11-2010 07:34 PM
small voltage on circuit with breaker off jasonmechler Electrical 3 08-24-2009 09:52 AM
Post-Tension Slab Problem Advice/Help Mike McBride Building & Construction 2 01-09-2007 02:51 PM




Top of Page | View New Posts

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