National Electrical Code Articles and Information

1. One that does not tend to cut or abrade the insulation [410.56(A)].
   
2. You must protect them from abrasion [410.56(B)}. Use a grommet or other listed device for this purpose.
   
3. They can't be within arms or stems [410.56(C)] and you can't have any unnecessary splices or taps within or on a luminaire [410.56(D )].
   
4. When wiring on luminaire chains and/or other moving or flexible parts [410.56(E)].
   
5. Arrange the conductors so the weight of the luminaires or movable parts does not put tension on those conductors [410.56(F)].