Quote:
Originally Posted by TOM GUY
OK, I'm just guessing that the 240v line is connecting in series with another line. There is a 7 volt drop in that line, so you read 7 volts.
Disable the block heater and you get 117VAC (or the other way around). The block heater is wired wrong. If it works OK, then get home and wire it correctly.
Tom
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The block heater is fine - I had that breaker off and that’s where Precision Circuits monitor gets its voltage reading for L2. My bad...
NXR and RandDescape nailed it early on. 153Stars explained it nicely.
Interestingly (to me anyway) the source for the voltage reading on L1 is on the breaker for one of the oasis heating elements, and turning it off, the panel reads 0 volts (no induced voltage there?) and flashes a “Brownout” warning.