Power Box Hum

J

J Ace

Guest
Hi there, dunno if this is the right forum, but here goes:

I live in New Zealand and have recently bought a house. Problem is, the
power meter is making a loud intermittent hum.

I've checked the earthing, which appears to be fine, and I cant find any
dodgy wiring to speak of. I have also removed all the loads from every power
socket, and the noise is still there. It doesn't seem to be affected by
weather conditions/humidity, and doesn't seem to occur when only the lights
are running from the power box (ie, I switched off the mains rails at the
power box). It's got me stumped.

Perhaps should I be checking all the outlets, or do you think that it could
just be a faulty power meter?

Any ideas would be much appreciated.

Cheers, Jono
 
"J Ace" <nope@nope.com> writes:

Hi there, dunno if this is the right forum, but here goes:

I live in New Zealand and have recently bought a house. Problem is, the
power meter is making a loud intermittent hum.

I've checked the earthing, which appears to be fine, and I cant find any
dodgy wiring to speak of. I have also removed all the loads from every power
socket, and the noise is still there. It doesn't seem to be affected by
weather conditions/humidity, and doesn't seem to occur when only the lights
are running from the power box (ie, I switched off the mains rails at the
power box). It's got me stumped.

Perhaps should I be checking all the outlets, or do you think that it could
just be a faulty power meter?
Click to expand...
Won't the power company come and check if you ask? Around here, the power
meter is often still electromechanical and there is a coil that is always
energized. This may lead to vibration of something and doesn't mean anything.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
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Important: The email address in this message header may no longer work. To
contact me, please use the feedback form on the S.E.R FAQ Web sites.
 
Jamie <jamie_5_not_valid_after_5_Please@charter.net> writes:

your meter is most likely an electric coil system like most of those
here in the USA. its possible the 50Hz (most likely) is causing some
magneted vibrations..
disconnecting your mains from this unit from with inside your home
should stop it because there is no longer a load on the meter to cause
it to turn. it this still keeps up i would suggest you better get some
one out there and look at it.
Click to expand...
Not quite. There is always excitation of the voltage coil in the meter
so only disconnecting the input will be guaranteed to quiet it. :)

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the feedback form on the S.E.R FAQ Web sites.
 
your meter is most likely an electric coil system like most of those
here in the USA. its possible the 50Hz (most likely) is causing some
magneted vibrations..
disconnecting your mains from this unit from with inside your home
should stop it because there is no longer a load on the meter to cause
it to turn. it this still keeps up i would suggest you better get some
one out there and look at it.


J Ace wrote:

Hi there, dunno if this is the right forum, but here goes:

I live in New Zealand and have recently bought a house. Problem is, the
power meter is making a loud intermittent hum.

I've checked the earthing, which appears to be fine, and I cant find any
dodgy wiring to speak of. I have also removed all the loads from every power
socket, and the noise is still there. It doesn't seem to be affected by
weather conditions/humidity, and doesn't seem to occur when only the lights
are running from the power box (ie, I switched off the mains rails at the
power box). It's got me stumped.

Perhaps should I be checking all the outlets, or do you think that it could
just be a faulty power meter?

Any ideas would be much appreciated.

Cheers, Jono
Click to expand...
 
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