As a point of information, two 10 gauge wires in parallel are equivalent in terms of resistance to 7 gauge, not 5 gauge.
I believe that for any gauge a factor of two change in resistance (which would occur if two identical wires were paralleled) is the equivalent of a difference of three gauge sizes, to a very close approximation.
Regards,
-- Al
I believe that for any gauge a factor of two change in resistance (which would occur if two identical wires were paralleled) is the equivalent of a difference of three gauge sizes, to a very close approximation.
Regards,
-- Al