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 12-23-2009, 11:26 AM   #1
Newbie
 
Join Date: Dec 2009
Posts: 1
Share |
Default

Do I have an electrical issue?


My readings are 124V to ground, and 213V between. This seems high to me for a 208V system.

Is this normal or do I have a problem?

HVACgirl is offline   Reply With Quote
Old 12-23-2009, 11:35 AM   #2
Lic Electrical Inspector
 
electures's Avatar
 
Join Date: Dec 2009
Location: The Great Police State of New Jersey
Posts: 1,666
Default

Do I have an electrical issue?


Quote:
Originally Posted by HVACgirl View Post
My readings are 124V to ground, and 213V between. This seems high to me for a 208V system.

Is this normal or do I have a problem?
It shouldn't be a problem.

electures is offline   Reply With Quote
Old 12-23-2009, 02:46 PM   #3
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Default

Do I have an electrical issue?


Quote:
Originally Posted by HVACgirl View Post
My readings are 124V to ground, and 213V between. This seems high to me for a 208V system.

Is this normal or do I have a problem?
208/(sq. rt. of 3) = 120v

100(213/208)=102% = 2% high.
For resi. power in MD, PoCo is allowed +/- 5%, and in some places they're allowed +/- 10%.

A 120v incand. bulb on 124v will last 60% of rated lifetime.

BTW, 124v x (sq. rt. of 3) = 215v vs. 213v that you measured. This is probably within a reasonable experimental error.

Last edited by Yoyizit; 12-23-2009 at 03:16 PM.
Yoyizit is offline   Reply With Quote
Old 12-23-2009, 04:17 PM   #4
nap
You talking to me?
 
nap's Avatar
 
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
Default

Do I have an electrical issue?


where are you that you have 208 for line to line?


and no, the numbers you have are well within legally mandated standards if you do have a 120/208 service.

Now, if you had a 120/240 system like most of the homes in the US have, you would definitely be below any acceptable voltage readings on the line to line check.
nap is offline   Reply With Quote
Old 12-23-2009, 05:18 PM   #5
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,936
Default

Do I have an electrical issue?


I would guess it is a commercial or mixed use building fed by a 3 phase 120/208 volt line where some tenants have just two phase lines coming into their premises.

Although most distribution systems are 3 phase, residential neighborhoods have single phase 120/240 service from a utility transformer connected to one distribution phase and ground or to two distribution phases (line to line), where between the latter the current is actually single phase.
__________________
Stop wasting time re-adjusting the pattern. Have several lawn sprinklers, one for each pattern.

Last edited by AllanJ; 12-23-2009 at 05:20 PM.
AllanJ is offline   Reply With Quote
Old 12-23-2009, 05:44 PM   #6
nap
You talking to me?
 
nap's Avatar
 
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
Default

Do I have an electrical issue?


Being a professional commercial/industrial electrician myself, I am aware of the possibilities.

I was merely trying to determine if HVACgirl is a pro that is lost or truly a DIY'er.
nap is offline   Reply With Quote
Old 12-24-2009, 03:13 AM   #7
" Euro " electrician
 
frenchelectrican's Avatar
 
Join Date: Apr 2006
Location: WI & France { in France for now }
Posts: 5,369
Default

Do I have an electrical issue?


Quote:
Originally Posted by HVACgirl View Post
My readings are 124V to ground, and 213V between. This seems high to me for a 208V system.

Is this normal or do I have a problem?

Naw., you are ok with that voltage there.

It will varies a little depending on the system layout is.

It can run low as 200 volts and high as 218 volts { that is line to line voltage on 208 V system }

Merci,Marc

frenchelectrican 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
Electrical issue - 240V - Water Heater emoore Electrical 9 09-30-2009 01:45 PM
CSST Gas Line Lightning Strike and Electrical Issue duteberta Electrical 18 07-29-2009 05:01 PM
House electrical wiring issue. gnidaerd General DIY Discussions 5 06-07-2009 02:42 AM
Unusual electrical issue LosLobo Electrical 7 11-10-2008 01:44 PM
Please Help - Weird electrical issue affecting home network sxpsxpsxp Electrical 23 02-03-2008 11:42 AM




Top of Page | View New Posts

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