Did I err when measuring Amp draw?

Discussion in 'General Electronics Chat' started by Cliff987, Oct 27, 2013.

  1. Cliff987

    Thread Starter New Member

    Oct 2, 2012
    10
    3
    I hooked up my multimeter to measure amp draw for my 240 VAC far infra red heat panels
    I measured 2.31 amps for each panel

    However did I err by not multiplying the 2.31 by 2 because it is 240 and I have two hot leads and no neutral?

    Or stated another way:
    When measuring one conductor to a 240 appliance testing for amp draw, should I double the reading from the one conductor to compensate for the other hot conductor?
     
  2. #12

    Expert

    Nov 30, 2010
    16,283
    6,795
    No. The math using 240V accounts for the current flowing in both sides of the 240 line.
     
  3. Cliff987

    Thread Starter New Member

    Oct 2, 2012
    10
    3
    thanks. I have only two of these panels, but if I like the way they work I'll get more and run 'em on the same circuit. So calculating load is important.
     
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