I have a deck that was just built and will shortly have a concrete patio poured under it that thanks to this forum's help is ready for a future hot tub. Once the deck and patio are done, I will be doing a little bit of electrical work under the deck to restore what I had under the old deck (outlet under the grill for the grill's light). In the process, I want to add a light and a switch under the deck for the patio. Since I am planning around a future hot tub, I want to make sure that I take that into account in my current plans.

I don't have my plans finalized, but was re-reading section 680 of the NEC (Fairfax County, VA - still under NEC 2005) to try to figure out my design requirements. I want to have a light switch fairly close to the door from the house (for the new patio light). I am having a hard time getting it the required 5' from the water - I can get it about 4' but that extra foot puts it too far from the door to be convenient. Section 680.22(C) ends "Alternatively, a switch that is listed as being acceptable for use within 1.5 m (5 ft) shall be permitted." Where would I find a switch that meets this requirement? I haven't found one online yet that says anything about the distance, so is a typical "wet location" switch sufficient? If it matters, I am planning to use PVC conduit and THWN wire for this install. Everything will be GFCI protected.

There are weatherproof switch plates that are actually covers with a built in lever switch that encloses the box (waterproof box) and allows you to switch it through the cover. Check out RACO type boxes and enclosures at any big box or Ace Hardware store.

Why not put it inside the house (by the door), that's where most people put switches to exterior lights.

Block is easily penetrated, either with a hammer drill or a 4lb sledge and a piece of 3/4" pipe. Sounds like you have stuccoed block walls and possibly plaster walls inside. Where in Fairfax county are you located?

Show us a picture.

Block is easily penetrated, either with a hammer drill or a 4lb sledge and a piece of 3/4" pipe. Sounds like you have stuccoed block walls and possibly plaster walls inside. Where in Fairfax county are you located?

Show us a picture.

Since I am at work right now, I don't have a picture, but it's a 1960 house in the Town of Vienna - Vienna Woods subdivision.

Please post picture of where the patio lights will be mounted.

http://img254.imageshack.us/img254/6580/img2694.jpg

Here's a picture of the deck. The future hot tub would go to the left of the door. The power would come down on the right side of the door (about 2' from the door) in conduit. I would like to have a "T" fitting there and come closer to the door for the weatherproof switch. The other part of the "T" would feed the light (haven't decided on exact placement but on the other side of the door for a table) and an outlet under where the grill will go.

If you put the switch outside you will need a weatherproof cover (switch cover). And that "T" you mention will be a weatherproof box with weather proof cover. Your circuit is already protected with a GFCI, all you need to do is provide protection for the switch.