Marcel Birthelmer wrote:

> Jinx wrote:
>
>>> Any input would be appreciated, both about the actual current
>>> sensing as well as the delivery mechanism from the garage (no
>>> cat5 drop; wireless?) to my room (my computer or otherwise)
>>
>>
>>
>> I don't think you'd need to isolate any particular wire to use a Hall
>> Effect clamp. A washer/drier would be drawing a fairly high current
>> that could be picked up pretty easily. 
>
>
> Hmm, as I understood you could only apply a current sensor on one 
> "strand" (either ingoing or outgoing) so that the fields don't cancel 
> each other out?


Have to measure one just conductor- if going across both, they cancel 
each other out.

I might add that this is how those  bathroom fault detectors work, i.e. 
if one leg doesn't match the other PRECISELY, there is a fault and the 
current on both legs is immediately broken.  

>
> You can get some pretty cheap
>
>> (NZ$10) 433MHz transceivers for comms, or make an FM "bug"
>> to transmit a beep in the broadcast band that you could pick up
>> on an ordinary radio
>>
>
> Hmm, interesting idea!
>
> - Marcel



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