Disconnect

[Alwayslearningelec]

THis is a 6 POLE disconnect switch. 6 Poles??? Wouldn't that mean 6 phase conductors which is impossible?

 

[Jraef]

2 x 3 phase circuits in parallel, but they want them both disconnected by the same disconnect. Most common scenario is that they have a blower motor and a separate feed for a heating coil, each fed from different sources. But if someone wants to work on the AHU, they need one lock-out point.

That said, “EF” is usually exhaust fan, so a heater on and exhaust fan would be odd…

Maybe a 2 speed 2 winding motor and the 2 speed controller is somewhere upstream, like in an MCC?

 

[augie47]

FYI. They do manufacturer 6pole disconnects both fusible and non-fusible but they are pricey.
It would behoove you to do a RFI or some more research to see if such an animal is actually needed,

 

[Alwayslearningelec]

Thank you Jraef & Augie!!