310.15 (E) 1

[AC\DC]

So I don’t use a lot of multi wire branch circuit. So was just double checking that I don’t count the neutral since it’s only carrying the unbalanced load.
got to reading 310.15 and E title and (1) seem to disagree with each other
E states
neutral conductor shall be considered current carrying in accordance with any of the following.
(1) a neutral conductor that carries only the the unbalanced current from other conductors of the same circuit shall not be required to be counted when applying the provisions of 310.15(c)(1)

so I read it as there countering each other E states they shall be considered current carrying with 1-3
1 says o well if it’s the unbalanced current of same circuit don’t worry about it.

I guess there trying to say that it is considered current carrying but don’t worry about it if it’s the unbalanced load.
does that seem like it should be worded a little better, or am I nuts.

 

[Canton]

Like anything in the NEC, it could always be worded better

If you have a con conduit and install (2) 120 volt circuits Line and Nuetral for one, and line and neutral (grounded conductor) for the other you would have (4) CCC.

Same example but only install one neutral, and make it a multi wire branch circuit, now that neutral only carries the unbalanced current from the other circuits and is not counted.

 

[infinity]

This may help:

Neutral Conductors:

Here's some examples of when to count and not count the neutral as a current carrying conductor or CCC:
3Ø- 208Y/120 or 480Y/277 volt system-different circuit types:
A) 2 wire circuit w/ 1 ungrounded, 1 neutral = 2 CCC's
B) 3 wire circuit w/ 2 ungrounded, 1 neutral = 3 CCC's
C) 4 wire circuit w/ 3 ungrounded, 1 neutral = 3 CCC's*
Notes:
A) A normal 2 wire circuit has equal current flowing in each of the circuit conductors so they both count as CCC's.
B) In this circuit the neutral current will be nearly equal to the current in the ungrounded conductors so the neutral counts as a CCC
C) In this circuit the neutral will only carry the imbalance of the current between the three ungrounded conductors so it is not counted as a CCC, with an exception,
*if the current is more than 50% nonlinear (see below for NEC article 100 definition) then the neutral would count as a CCC.

1Ø- 120/240 volt system-different circuit types:
D) 2 wire circuit w/ 1 ungrounded, 1 neutral = 2 CCC's
E) 3 wire circuit w/ 2 ungrounded, 1 neutral = 2 CCC's
Notes:
D) A normal 2 wire circuit has equal current flowing in each of the circuit conductors so they both count as CCC's.
E) In this circuit the neutral will only carry the imbalance between the two ungrounded conductors so the neutral is not counted as a CCC.
Nonlinear Load. A load where the wave shape of the steady-state current does not follow the wave shape of the applied voltage.
Informational Note: Electronic equipment, electronic/electric-discharge lighting, adjustable-speed drive systems, and similar equipment may be nonlinear loads.