A:  ANSI/NECA 1-2010 standard (q) states: When using cable ties, do not over tighten, to ensure the cable tie does not cut the conductor’s outer jacket. Cable ties shall not be used to support raceways or cables. “It is the recommendation of this standard that cable ties not be used to support cables. It is common to see cable ties used in PV installation as the sole method of support. While it is not specifically disallowed in the NEC, this industry standard does not allow it.”  – Bill Brooks, P.E., White Paper: Cable Management in Solar PV Arrays, Page 4, Jan. 16, 2014