dslreports logo
site
 
    All Forums Hot Topics Gallery
spc

spacer




how-to block ads


Search Topic:
uniqs
1848
share rss forum feed


sap5885

@spcsdns.net

high reading

My DMM is reading 154 volts all over the house. I've had problems with a couple components, is this possibly the problem? If so do I hire an electrician or do I call the provider?


cdru
Go Colts
Premium,MVM
join:2003-05-14
Fort Wayne, IN
kudos:7
Presuming your meter is correct, call the provider and tell them you have overvoltage.

garys_2k
Premium
join:2004-05-07
Farmington, MI
reply to sap5885
All over the house, as in every outlet you've tested, then it's definitely a provider issue. Can you test line to line on a 240 volt outlet?

This could be dangerous, things like motors can overheat with the voltage that high. Call right away.


jack b
Gone Fishing
Premium,MVM
join:2000-09-08
Cape Cod
kudos:1
reply to sap5885
Call your power delivery co asap. It could be an open/failing neutral which can be hazardous.

I would unplug anything containing electronics, if it's not already too late.
--
~Help Find a Cure for Cancer~
~Proud Member of Team Discovery ~


leibold
Premium,MVM
join:2002-07-09
Sunnyvale, CA
kudos:10
Reviews:
·SONIC.NET

3 recommendations

said by jack b:

I would unplug anything containing electronics, if it's not already too late.

Actually most electronics (those with switch-mode power supplies) are likely to be the least effected by this. Many of those devices will be rated for AC voltage from 90V to 250V which puts the 154V reading on the OP multimeter in the middle of the acceptable voltage range.

Electro-mechanical devices such as motors (as garys_2k See Profile already pointed out) are at a much bigger risk if that voltage is being confirmed.

For the OP, make sure that the DMM is set to measure AC voltage in RMS (root mean square) mode and not in Peak mode:

154Vpeak = 110Vrms
--
Got some spare cpu cycles ? Join Team Helix or Team Starfire!

lutful
... of ideas
Premium
join:2005-06-16
Ottawa, ON
kudos:1

1 recommendation

reply to sap5885
said by sap5885 :

My DMM is reading 154 volts all over the house.

Can you post a photo of the DMM reading 154V? Maybe it is setup improperly.

It is very unlikely that AC RMS voltage would be that high for prolonged periods and not be reported by a whole bunch of neighbors to the utility.

By the way, the "peak" value for perfect 120V AC sine wave is actually 172V. So if your DMM was showing peak value, 154V reading may even mean you have lower than normal AC voltage.


pende_tim
Premium
join:2004-01-04
Andover, NJ
kudos:1
Reviews:
·Comcast
reply to sap5885
at 154VAC, incandescent bulbs will have a life of several minutes and burn like a supernova until they fail.

Are you seeing this?

If so, you have a problem. If not, as others have said, check the meter setup.
--
The difference between genius and stupidity is that genius has its limits.


AVD
Respice, Adspice, Prospice
Premium
join:2003-02-06
Onion, NJ
kudos:1
reply to sap5885
annon poster needs pics.


sap5885

@spcsdns.net
reply to garys_2k
Thx, will do.


sap5885

@spcsdns.net
reply to pende_tim
Not having any problems with the light bulbs, will call in an electrician to be on the safe side. Thx


cdru
Go Colts
Premium,MVM
join:2003-05-14
Fort Wayne, IN
kudos:7

2 recommendations

said by sap5885 :

Not having any problems with the light bulbs, will call in an electrician to be on the safe side. Thx

An electrician will charge you regardless if there is anything wrong. And if it's not on your side of your meter, all he's going to do is call the power company on your behalf.

The power company is obligated usually to at least check it out for free and repair anything that they are responsible for.

nonymous
Premium
join:2003-09-08
Glendale, AZ
reply to AVD
said by AVD:

annon poster needs pics.

Of what?


dennismurphy
Put me on hold? I'll put YOU on hold
Premium
join:2002-11-19
Parsippany, NJ
kudos:3
Reviews:
·Verizon FiOS
said by nonymous:

said by AVD:

annon poster needs pics.

Of what?

The dmm.


whizkid3
Premium,MVM
join:2002-02-21
Queens, NY
kudos:9
reply to lutful
said by lutful:

By the way, the "peak" value for perfect 120V AC sine wave is actually 172V.

120V x 1.414 = 169.7V

you are a little off.

lutful
... of ideas
Premium
join:2005-06-16
Ottawa, ON
kudos:1

2 recommendations

said by whizkid3:

said by lutful:

"peak" value for perfect 120V AC sine wave is actually 172V.

120V x 1.414 = 169.7V

I am a DMMy who multiplied 172V peak by 0.7 to get 120V rms.

bluechalk

join:2009-09-20
New York, NY
reply to sap5885
Go to your nearest hardware store and get a Kill A Watt. It should cost around $20. Its designed to plug into a wall power outlet and among other things, give you an accurate voltage reading.


tschmidt
Premium,MVM
join:2000-11-12
Milford, NH
kudos:9
Reviews:
·G4 Communications

1 edit

1 recommendation

reply to sap5885
said by sap5885 :

Not having any problems with the light bulbs, will call in an electrician to be on the safe side. Thx

If that is the case the voltage cannot be as high as you measured. I agree with leibold See Profile and lutful See Profile meter is reading peak rather then RMS.

Since nothing has blown up yet I'd hold off on calling an electrician and do what bluechalk See Profile suggested. Get a Kill-A-Watt. It is a handy little device for all sorts of stuff and will tell you right away if you have a problem.

»www.p3international.com/products···-ce.html

/tom


AVD
Respice, Adspice, Prospice
Premium
join:2003-02-06
Onion, NJ
kudos:1
icemonkey.com had them on sale last week.


AVD
Respice, Adspice, Prospice
Premium
join:2003-02-06
Onion, NJ
kudos:1
»www.icemonkey.com/p3-internation···ic-timer
--
* seek help if having trouble coping
--Standard disclaimers apply.--