How do I isolate 2 switches for 2 devices?

[COamateur]

Hey all!

I'm trying to find the best way to wire a dual switch for a porch light and indoor ceiling fan. The source power cable, fan power cable, porch light power cable, as well as a smoke detector power cable all reside within an accessible metal j-box (see attached drawing).

I currently have a 12-2-2 (black, red, white, white, ground) cable run from this j-box to connect to a single pole dual switch.

My plan is to take:

• the 12-2-2 feeds (black and red) from the switch run and tie them into the hot (black) from main power source
• a 12-2-2 neutral (white) from switch #1 and tie directly to the hot (black) from the porch light
• a 12-2-2 neutral (white) from switch #2 and tie directly to the hot (black) from the fan
• the hot (black) from smoke alarm to hot (black) from power source
• the neutrals from power source, fan, porch light, and smoke detector all together

Can anyone give feedback on my wiring plan within the j-box? I don't want to get any wires crossed and my brain is having a hard time figuring this one out!

 

[westward10]

In essence yes this should work. One of the whites in the 12-2-2 should have a red stripe on it, I believe this is known as the candy cane wire Stateside. The whites used for hots should be identified with black tape or sleeve at both ends so they are not confused with the neutrals.

 

[COamateur]

Thank you @westward10 ! Very much appreciated!