NFPA70 (the NEC) is for premises wiring not for machinery. NFPA79 (Electrical Standard for Industrial Machinery) may be more appropiate for your application. The scope of NFPA79 includes: "...systems of industrial machines...commencing at the place of connection of the supply..."
Some major differences between the two standards:
minimum circuit wire size; NEC-#14, NFPA79-#24 (in raceway)
maximum raceway fill; NEC-40%, NFPA79-50%
drain holes in raceways; NEC-not allowed, NFPA79- upto 1/4"
raceway as grounding or bonding conductor; NEC-allowed; NFPA70 - not allowed
[This message has been edited by JBD (edited 03-10-2003).]
