What Watts are What?

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allancomeau
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Posted
On 10/16/2017 at 10:39 AM, Jake said:

I concur with Terry on this one.  The device plugged into the wall to monitor power consumption for any load (AC unit, appliances, rice cooker, etc) will not affect the operation of the load.  It's like a tachometer measuring RPM's will not affect the operation of the engine.  

  

That depends........If the device is in series (measuring using a shunt) then here is a very small loss.

If it is using a (clamp) current sensor then there is no loss.

 

A larger question might be whether the 'device' is measuring peak, or average, or RMS

 

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allancomeau
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Posted

My bad............. I said, "Your A/C manual should state the turn-off surge current."

 

That should be   "Your A/C manual should state the turn-on surge current"

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