[RE-wrenches] Tapping from one leg of a 240V inverter to power a tracker?

[William Miller]

Bill:


This scenario is not NEC compliant.  The inverter feeds need to connect to 
a dedicated OC device only, not additional loads.  690.64(B)

William Miller

At 01:22 PM 6/27/2012, you wrote:
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>We are doing a tracking system and need to run a couple conductors back 
>out from the house to power the tracker. I suggested that we tap off of 
>the output from one of the AC legs of the Enphase output instead. From the 
>inventor of the tracker: from the manufacturer"The tracker needs 12V 10A 
>on demand. I have found that a small battery w/ charger nearby or AC to DC 
>converter to 20A (for surge) will work." These would be short surges of 
>perhaps 4 seconds. Since it is backfeeding onto the lines instead of 
>powering a device, i.e. a motor which might overheat if there is an 
>imbalance, the only consideration would seem to be that the frequency of 
>the signal remain stable. Once in the bus bar of the house panel, it would 
>be irrelevant that there would be a temporary voltage drop or slight imbalance.
>
>Any thoughts? Thank you.