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Intermittant hum in my conduit

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Intermittant hum in my conduit mwilliams4 03-10-2008
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Posted by Oren on March 11, 2008, 2:37 am
>>>> I'm getting an intermittant hum in my electrical conduit in my garage.
>>>> It is actually pretty regular around every 30 seconds or so.
>>>> It seems like maybe a surge??
>>>> If you hold onto the conduit, you can actually feel it vibrate.
>>>>
>>>> Any ideas??
>>>
>>>We might have some if you'll tell us what's in the conduit
>>>
>>
>> A hum?
>
>He very well could have discovered where all the honey bees have gone
>

Good thought. :-))


Posted by Clot on March 10, 2008, 8:40 pm
mwilliams4@socal.rr.com wrote:
> I'm getting an intermittant hum in my electrical conduit in my garage.
> It is actually pretty regular around every 30 seconds or so.
> It seems like maybe a surge??
> If you hold onto the conduit, you can actually feel it vibrate.
>
> Any ideas??

Could be a resonance thing - strp light, freezer/ fridge attached. When you
touch the conduit does that damp it?



Posted by aemeijers on March 10, 2008, 10:05 pm
mwilliams4@socal.rr.com wrote:
> I'm getting an intermittant hum in my electrical conduit in my garage.
> It is actually pretty regular around every 30 seconds or so.
> It seems like maybe a surge??
> If you hold onto the conduit, you can actually feel it vibrate.
>
> Any ideas??
None of the others said it, so I will- put a good analog voltmeter
across the conduit and a good ground. Something leaking 60 hz into the
metal can produce a hum and what feels like a vibration to your
fingertips. I used to get that with radios powered by cheap
transformers, and I also got it on some idiot-installed florescent
lights in my laundry room.

aem sends...

Posted by on March 10, 2008, 11:43 pm
It's electrical conduit that goes to a bank of outlets in the garage.
It does dampen when you touch it.
if it were 60Hz why would it do it at near 30 second intervals?

I'll have to try the voltmeter.

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