Stranded versus Solid Cable
#11
JK Junkie
Stranded cable will have a higher current rating than an equally sized solid cable. This is due to the heat dissapating capability created by the increased surface area of the individual strands. This may or may not have any bearing on your install depending on how close you are to exceeding the current handling capability of the wire you installed.
If the OP is using a #12 ( or even a #10 ) conductor to carry a 40 Amp load, then he has exceeded the capabilities of those conductors ( solid or stranded ).
Last edited by JK-Ford; 04-24-2013 at 08:36 AM.