cUL life safety loads and fire pump

[BPE9]

Hello Group,

My first post.

Can anyone tell me if the life safety and fire pump feeders need to be isolated(UL 1558)? I'm working on a project and the engineer specified UL891 and thermomagetnic for the fire pump.

Thanks.

 

[ron]

700.10(B) makes reference to seperate vertical SWBD sections but indicates no isolation is required. Of course SWBDs in general don't have 1558 type isolation, although it could be special ordered.