National Electrical Code Articles and Information

1. They must be hung from separate stranded rubber-covered conductors that are soldered directly to the circuit conductors but supported independently [410.54(A)].
   
2. Unless part of listed decorative lighting assemblies they must be 14 AWG for mogul-base or medium-size screw shell lampholders, smaller than 18AWG for intermediate or candelabra-base lampholders [410.54(B)].
   
3. They must be twisted together unless cabled in a listed assembly [410.54(C)].
   
4. Secure them in a manner that does not tend to cut or abrade the insulation [410.56(A)].
   
5. No, you cannot locate them in these places [410.56(C)]. Locate them in the connection box or (if available) the wiring shell that comes with the luminaire.