On March 21, 2014 at 12:20, FunHouse Texas said...
Does 70 volt cross the line from "low-voltage" to "high-voltage" thus requiring a Electrical license?
No.
To begin with, it's limited current -- that high voltage ensures that the amp won't output enough current to weld or, in most cases, to start a fire.
Next, 70 volts is not a number chosen completely by accident. There was some important spec in the past, that I don't know about, regarding 100 volts. It may simply be that 100 volts was the original choice of a system like this; I don't know. Now, the square root of two, divided by two, times 100 volts is 70.7 volts, or as we call it, 70 volts. If I didn't have to go earn some money right now, I'd search out more details because now I want to know!
