517.30(c)(1) Essential Electrical Systems for Hospitals

[guyman]

Under this section the Wiring Requirements (1) Separation from Other Circuits, Can you clear this up. First paragraph says: System shall be kept entirely independent. Second paragraph says: Wiring of the life safety branch and the critical branch shall be permitted to occupy the same raceway.

 

[roger]

Guyman, you have to read a little further and take note the 4 conditions that it would be allowed.

C) Wiring Requirements
(1) Separation from Other Circuits The life safety branch and critical branch of the emergency system shall be kept entirely independent of all other wiring and equipment and shall not enter the same raceways, boxes, or cabinets with each other or other wiring.
Wiring of the life safety branch and the critical branch shall be permitted to occupy the same raceways, boxes, or cabinets of other circuits not part of the branch where such wiring complies with one of the following:

(1) Is in transfer equipment enclosures

(2) Is in exit or emergency luminaires (lighting fixtures) supplied from two sources

(3) Is in a common junction box attached to exit or emergency luminaires (lighting fixtures) supplied from two sources

(4) Is for two or more emergency circuits supplied from the same branch

Roger