N0ZYC : owell. whatever. I think the bot is wrong on the resistivity of #10 copper N0ZYC : I just measured my only piece of #10 OFC that's reasonably long and it's about 0.00162 ohms per foot. which is a lot less than the .01 the bot is claiming kludge : N0ZYC: What did it say? N0ZYC : it said 1 milli ohm per foot for #10 kludge : And in what units? N0ZYC : "mOhm" N0ZYC : so uless m is miro kludge : Just a sec, let me get the ITT Handbook. N0ZYC : uOhm should be for micro N0ZYC : I don't have a second length of it to do my subtraction on , but the 4 wire measure got me 0.00162 ohms per foot N0ZYC : that will include the connectors on both ends as well as the shorting stub kludge : Okay, annealled copper (non OFC) is 0.9989 ohms per thousand feet at 68F. N0ZYC : per THOUSAND. not per HUNDRED kludge : I remember the rule #10 - 1 - 1000. N0ZYC : !wire 10 N0ZYC : owell, cached 10AWG (12.2SWG, 5.26mm2, 2.59mm dia, 101.9 mils) Cu Wire Free air: 57.48A, Bundled: 33.82A, Windings: 14.83A, mOhm/Ft: 1, mOhm/m: 3.28 N0ZYC : " mOhm/Ft: 1," N0ZYC : bzzzt kludge : My number is from the ITT Handbook which I trust more than software. Maybe you should talk to whoever is responsible for the bot. N0ZYC : the bot's resistivity is apparently off by a factor of 10