Did we ever answer the question about the 10 lamp holders, each on a snap switch and all connected to a single 20a circuit. You will have 11 current carrying conductors in the pipe but it is clear they can never overheat since total current is limited to 20a.
If anything the raceway will run cooler since 10 of them are sharing the 20a on the "hot" side.
Ah, it's times like this I'm glad I'm a PE. If the inspector doesn't like it, I stamp it, problem solved!
