215.4

[MR. S]

Can anyone interpit 215.4(A)?What are two or three sets of 3-wire feeders or two sets of 4-wire or 5-wire feeders?

 

[chris kennedy]

5-wire feeders?

Never seen one.

215.4 part of the HB commentary:

See 250.102(E), 250.134(B), 300.3, 300.5(I), and 300.20 for requirements associated with conductor grouping of feeder circuits.
A 3-phase, 4-wire (208Y/120-volt, 480Y/277-volt) system is often used to supply both lighting and motor loads.The 3-phase motor loads are typically not connected to the neutral and thus will not cause current in the neutral conductor. The maximum current on the neutral, therefore, is due to lighting loads or circuits where the neutral is used. On this type of system (3-phase, 4-wire), a demand factor of 70 percent is permitted by 220.61 for that portion of the neutral load in excess of 200 amperes.

And a friendly reminder...

The commentary in the HB is not enfrocable.