I'm starting to work on building panels that need to comply with UL508A.
My panel is designed for one or more motors and any other loads.
However, I'm struggling to understand whether the main disconnect of the panel should comply with Section 30: Disconnect Switches or Section 32: Overcurrent Protection of Feeder.
The term 'switch unit' is unfamiliar to me, but could this be considered a non-fusible switch? For example, something like the 194R-NU line?
I expanded my research to NEC Article 670.4 (B) Disconnecting Means (which seems unrelated to me), but it mentions:
"...The disconnecting means shall not be required to incorporate overcurrent protection."
Could anyone share their experience regarding the main disconnect of an industrial control panel?
My panel is designed for one or more motors and any other loads.
However, I'm struggling to understand whether the main disconnect of the panel should comply with Section 30: Disconnect Switches or Section 32: Overcurrent Protection of Feeder.
The term 'switch unit' is unfamiliar to me, but could this be considered a non-fusible switch? For example, something like the 194R-NU line?
I expanded my research to NEC Article 670.4 (B) Disconnecting Means (which seems unrelated to me), but it mentions:
"...The disconnecting means shall not be required to incorporate overcurrent protection."
Could anyone share their experience regarding the main disconnect of an industrial control panel?