OK:
The engineer would have to be familiar with the raceway fill 40% Table 1, Chapter 9 requirements, and if the neutral was replaced with two neutrals of the same size, would that existing raceway be large enough, and would the existing raceway (one found in Annex C) be adequate for the additional wire?
PS: Don't try to feed a snake into the existing raceway because it will get stuck on the tape the installer did not remove when the first feeder was installed.
This means that the 4 wire feeder would have to be pulled out an back in with 5 wires.
Oh! and what about the 110.14 rule related to more than one wire under a lug...
Just some stuff, and to date have not ever received any reply to this question from an engineer.
[This message has been edited by Joe Tedesco (edited 02-12-2003).]
