According to :
On Tue, 23 Aug 2005 17:39:59 -0000, (Chris
Lewis) wrote:

Does it not also say that _each_ conductor must be the same size, and
each capable of carrying the full breaker current?

[Our code does.]

Which basically means you can parallel conductors to reduce end-to-end
resistance (voltage drop), but NOT to increase circuit ampacity.

No you add the ampacity of paralleled conductors but bear in mind they
must be 1/0 or larger (about 10mm).
The reason you can parallel conductors is to use a size that is more
easily handled in large ampacity circuits.

As I mentioned, _not_ in our code.

You can only parallel conductors to decrease voltage drop. The individual
conductors must still be large enough to take the full ampacity.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.