Outdoor wiring

[Streetbu]

So I built a lean to off the back of my garage and want to add a single light, and outlet, and an outdoor outlet mounted on the steel siding. The switch and "indoor" outlet will be next to the current opening so they need to be weatherproof, as of course does the actual outdoor outlet. Is it ok to use the gray pvc conduit for all of this? I just ordered an outdoor 2 gang switch and outlet plate. Everyone had them separate but not together. Now if I can find a 2 gang PVC box with three 1/2" holes. That's proving harder than expected. Here's a pic of the lean to. The switch and outlet will be mounted on the left side of the actual garage, light overhead, and the outdoor outlet on the back side facing the back lawn which is to the right in this pic.

 

[RickP]

The gray PVC conduit will work fine. I've used 1-gang boxes with 3 holes:
Home Depot
But I'm not sure about similar 2-gang boxes - try an electrical supply house if you can't find them at a big box store.

Whenever I need specific knockouts, I use a threaded PVC box:
Amazon
I've gotten those at Home Depot, but I couldn't them on the website.

 

[Streetbu]

I can not find a 2 gang 3 hole box. Guess they don't make them. Looks like I'll have to go with the second idea you had. Thanks!

 

[Mustang51js]

Uf wire is much easier to work with,especially if you want to snake the wire inside