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U.S. Issue - 120V Circuits and 240V Circuits - How to Measure

Submitted by JBlackham on Thu, 26/11/2015 - 20:04

I have setup the emoncms to measure at 110V for the U.S.
The two mains that come into my house are 240V.
How do I measure each of the 2 main circuits within the emoncms?

If its configured to be 110V in the settings Do I need to multiply by 2 for each of the mains coming from the grid to my house?
 

EmonCMS(110V) --->Grid--->CT Clamp---->Main 1 in breaker ?  Take what comes in off ct and X 2?
If the circuit I am measure is 240V and the emoncms setting is set to 120 I need to multiply by 2 correct?
Can you explain to me what that setting does in emoncms or is there a generic setting I can apply to each feed to tell it what Voltage it is?

Help how to measure both 120V Circuits and 240V Circuits?  Does the emonpi just use what it reads off the VRMS Setting?

Thanks guys!
 

‹ input - input = feed No data from 3 phase sketch ›
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Robert Wall's picture

Re: U.S. Issue - 120V Circuits and 240V Circuits - How to Measure

Submitted by Robert Wall on Thu, 26/11/2015 - 21:16.

Have you read the Building Blocks page about use in N.America? http://openenergymonitor.org/emon/buildingblocks/EmonTx-in-North-America

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