Q: Can AC and DC conductors be run together in the same bundle?

A:  There is a significant change in the 2014 NEC that disallows AC and DC conductors to be installed together in the same raceway or enclosure unless they are separated by a partition. The CAB Cable Ring system allows for two different lengths of Cable Rings to be installed from the same messenger wire. This effectively creates the separation between the AC and DC cables that is necessary.  – Bill Brooks, P.E.,  White Paper: Cable Management in Solar PV Arrays, Page 6, Jan. 16, 2014