> From: "Alan Fletcher" <a...@well.com>\ > Sent: Sunday, August 19, 2012 4:46:13 PM
> While you're at it, calculate the diameter of the 3-wire extension > cord needed to power it from the mains! 107 hp = 78.7 KW / 120 V = 655 Amps https://wiktel.com/standards/ampacit.htm Highest gauge listed = 0000 = 260A (in insulated 3-wire cable) http://www.powerstream.com/Wire_Size.htm 0000 = Diameter 0.46" (1.6mm). Allowing for insulation, that makes a bundle of about 1 inch diameter. To carry 655 amps you need 2.5 of them -- round up to 3 So, Feynman would have needed to yank out 3 1-inch diameter extension cords.
