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Author Topic: Celling Fan  (Read 1523 times)

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Offline JblissTopic starter

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Celling Fan
« on: February 23, 2016, 01:05:08 pm »
This might be the wrong place.
I have taken out a celling fan in my house due to renovations and i get reading of 24 -25 volt AC across the fan wires and if they are disconnected then none of the fans in that part of the house work. I have looked up 24v AC fans and can't find anything. is this 24v being created from a transformer in the celling or ???
anyone with any knowledge of fans care to help
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Offline Dave

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Re: Celling Fan
« Reply #1 on: February 23, 2016, 01:15:31 pm »
It's probably voltage induced from the nearby wires. Some meters have a low impedance mode for these exact occasions, it makes the input impedance of the meter just low enough (about 2k, IIRC) to put a bit of load on the measured nodes, so the ghost voltages disappear.
I can't say I would advise you to attach a resistor between the wires and try remeasuring. You wouldn't want things to blow up in your face, should you make a mistake.
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<fellbuendel> it's arduino, you're not supposed to know anything about what you're doing
<fellbuendel> if you knew, you wouldn't be using it
 

Offline JblissTopic starter

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Re: Celling Fan
« Reply #2 on: February 23, 2016, 01:18:44 pm »
Thanks Dave

whats weird is they have to be connected for the fans to work? 
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