Hey electricians...


B

Big Al

Friend of mine just had 400 AMP 3 phase put in his shop. It's 208 volts. He
has a machine that says 230 Volts on the name plate. The machine has an
autoformer in it for 208 or 230 volts. (The machine is actually 400 volts,
it's from Italy, the autoformer bumps the input to 400 volts to run it.) The
city inspector says he has to have the name plate re-stamped to read 208
volts since that's what is actually connected to it. Anyone ever hear of
this?

Al
 
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G

glenn P

Absolutely correct.

The rated input should be clearly & permanently marked on it. Someone might
connect it to 400V otherwise...
 
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J

John

I don't know your city code, but that's a strange requirement. What is the
purpose of this label?

If there is a 110-120V fan in the shop, would your friend have to measure
the line voltage (let's say it is 118V) and relable the fan 118V? What if
the voltage drops to 116V during heavy load?

Maybe easier to just attach a voltmeter to each equipment.
 

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