Verticle Support

[PH87]

What is the requirement for vertical support of EMT 358.30?
What is the max length RMC can be used to support luminaries such as low bay lighting before support is needed?

 

[BackInTheHabit]

What is the requirement for vertical support of EMT 358.30?
What is the max length RMC can be used to support luminaries such as low bay lighting before support is needed?

See NEC 2008 300.19 and T300.19 for EMT Vertical Support

See NEC 2008 344.30 and T344.30(B)(2) for Supports of RMC