Parallel conductors?

[ktm]

Why is 1/0 the smallest conductor that can be used for paralleling?

 

[iwire]

Why is 1/0 the smallest conductor that can be used for paralleling?

Well there are some exceptions for control wiring.

But for feeders I don't see the need to parallel less than 1/0, 1/0 is actully a fairly small condutor as it is.

Also the smaller the size conductor the more likely one of the paralleled conductors will be overloaded due to small differences in length.