Tap with MCS panelboard.

[binwork91]

I have a project, tap conductor feeds a panelboard with MCS (molded case switch).

Is MCS a overcurrent protective device?

In my opinion, MCS is not a overcurrent protective device, it does not provide overcurrent protection, it only has a fixed instantaneous self-protecting trip element which may open the switch under high fault conditions, therefore, we can not use 10ft tap, 25ft tap rule to feeds a panelboard with MCS.

What is your opinion?

 

[electrofelon]

I have a project, tap conductor feeds a panelboard with MCS (molded case switch).

Is MCS a overcurrent protective device?

In my opinion, MCS is not a overcurrent protective device, it does not provide overcurrent protection, it only has a fixed instantaneous self-protecting trip element which may open the switch under high fault conditions, therefore, we can not use 10ft tap, 25ft tap rule to feeds a panelboard with MCS.

What is your opinion?

A molded case switch is just a switch. You need an OCPD at the termination of the tap conductors.

 

[charlie b]

Can you use conductors to feed the panelboard that are large enough to be protected by the upstream overcurrent device? In other words, can you make this not be a "tap"?