Sizing conductors is not a difficult task, but more is involved than referencing just one section, one article or even one chapter in the National Electrical Code (NEC). To select the correct conductor size, it is necessary to reference several sections throughout the Code.
Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Questions can be sent to email@example.com. Answers are based on the 2014 NEC. Listed luminaire?