Footnote: Lionel harnesses use 105-degree insulation (Centigrade, IIRC). Yes, I know that's the old name; try Celcius, which the site tells me I have misspelled, or... . Most of your amperage/wire gage tables will be based on some other temperature rating. Then your ambient temperature is a factor-- few have belonged to a club in a 105-degree (Fahrenheit) space. Some useful relationships for the logarithmic AWG series:
3 gage numbers lower will double the copper area, but 4 gage numbers (as 26 AWG to 22) will be required to double the amps carried (or ampacity) without raising the copper temperature in contact with the insulation provided that the insulation thickness does not increase. Get manufacturer's tables if possible. --Frank
