How to measure amps on 240 circuit

DigitalOak · #1 Sep 6, 2009, 01:03 PM

Using an Ideal 600 AAC Clamp Meter at the breaker box, do I measure both leads from the box and add them to learn the amps the motor is using? Each lead says 4.5 amps, so motor uses 9 amps? (The motor says 6.3 amps at 230 volts, but we have 240.)

Stratmando · Sep 6, 2009, 01:09 PM

4.5 Amps is your load at 240 volts. If each leg is NOT drawing the same, 1 side is leaking to ground or 120 volt devices and a neutral will be present.
With No neutral, both legs should draw the same.

DigitalOak · Sep 6, 2009, 01:42 PM

Thank you for your answer. Much appreciated.

KeepItSimpleStupid · Sep 6, 2009, 01:56 PM

Your 6.3 A is likely FLA or Full Load Amps. Motors will draw a current depending on load.



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