amperage rating for MWBC disconnect

[thane984]

Hi, I've learned a lot on this forum over the years, thanks everyone, this is my first post.
I am running a MWBC from house to new garage using a double pole 20A breaker and 12-3 UF. In garage, I need a disconnect on the 12-3 before splitting into my 2 circuits using 12-2 romex. Inspector suggested this 30A double pole switch (https://www.homedepot.com/p/Leviton...Switch-White-3032-2WS-R62-03032-2WS/100356941). But if the switch is operating on both circuits do I need a 40a switch instead of 30?
Thank you!

 

[ActionDave]

I am closing this thread in accordance with forum rules. If you are not an electrician, we are not permitted to assist you in performing your own electrical installation or maintenance work.

If installing stuff is not your occupation, then we can’t help you install stuff. You would have had to agree with that rule during the process of registering on the forum.

The reason is that the forum’s owner does not want a person to get an answer to the question they asked, but not get answers to the dozens of other questions they should have asked and were unaware they needed to ask. Mike doesn’t want anyone to get injured by any incidents related to electrical installations. But he also doesn’t want to be sued by the injured party’s relatives on the basis of him not telling you enough to keep you safe.