Isolated Power Conductors

[jar546]

Can isolated power system conductors be run in the same raceway or gutter as other systems of the same voltage?

 

[Gregg Harris]

Can isolated power system conductors be run in the same raceway or gutter as other systems of the same voltage?

Which code cycle?

 

[jar546]

Whichever one you want, just specify the one you are using for your answer. This way we all see if there are differences between cycles and learn.

 

[Gregg Harris]

Whichever one you want, just specify the one you are using for your answer. This way we all see if there are differences between cycles and learn.

2011 No

517.160 Isolated Power Systems.

(A) Installations.

(1) Isolated Power Circuits. Each isolated power circuit shall be controlled by a switch or circuit breaker that has a disconnecting pole in each isolated circuit conductor to simultaneously disconnect all power. Such isolation shall be accomplished by means of one or more isolation transformers, by means of generator sets, or by means of electrically isolated batteries. Conductors of isolated power circuits shall not be installed in cables, raceways, or other enclosures containing conductors of another system.

2008 yes

517.160 Isolated Power Systems.

(A) Installations.

(1) Isolated Power Circuits. Each isolated power circuit shall be controlled by a switch that has a disconnecting pole in each isolated circuit conductor to simultaneously disconnect all power. Such isolation shall be accomplished by means of one or more isolation transformers, by means of generator sets, or by means of electrically isolated batteries.

 

[jwelectric]

Also see UL KEWV

 

[jar546]

Excellent replies. My work here is done. Thank you!!

 

[Gregg Harris]

Excellent replies. My work here is done. Thank you!!

Our work is never done.