Thanks, that’s kind of what I was doing, but my temperature on the 4/0 is -50 C to +105 C. = 221F isn’t on the scale, it goes up to 194F so I wasn’t sure if I was doing it right. I’m all copper so it’s on the left side of the chart, I’m guessing use the 194F box because that’s as high as the chart goes. For 4/0 I get a number of 260, is that the maximum amount of amps that 4/0 wire should flow at on a 86%F day?
I ordered the fluke 324, it showed up and it doesn’t do DC threw the clamp, I missed the fine print, big print says AC/DC clamp meter.
now I’m trying to decide on the Fluke 325 or a Kl4in CL800 or CL900.