i am looking at the design of class 1 wiring in a conduit using # 16,18 AWG thhn wire.
i am trying to find the number of # 16 & 18 awg wires that can be placed in various conduits. the smallest listing is for # 14. the nec 2002 code book does not list the cross sectional area for this wire in the tables. i had to go all the way back to nec-87 to find the cross sectional area.
does anyone know of a code issue that prevents me from using this wire for control wiring--- photo cells, switches, valves?
and where or how do you find the cross sectional wiring area?
thank you in advance.