Can a single circuit breaker be used to protect the control voltage circuit for 40 servo drives that are distant from each other in a mfg line and meet NEC code? Can anyone point me to the section of the code that regulates this? Thanks for your help.

Carlos Quiroz
ME

 

Responding to Caros Quiroz's query... Yes, but only the control voltage circuit conductors are protected. Conductors used for interposing devices, unless sized for the CB rating, as well as the interposing devices them selves, are not covered!

Applicable NEC articles are '250 and '725!'