We'll be laying out several new driveway slabs for our daughters to park on when commuting to college, and need a couple of NEMA 14-50 outlets near those slabs as they both want Nissan Leafs. We will be laying conduit under the 19' of driveway, and popping it up beside the new slabs (approximately 24' from the house). I was going to purchase a couple of weatherproof outdoor boxes from Amazon that look like this:
Obviously, I can't just connect the wires and lay this box on the ground. I assumed I could search Amazon or google for "outdoor electric box post" and find a bunch of affordable metal posts with standard mounting brackets for boxes like the one above, but I just keep seeing garden light posts. Amazon did show this, but it's designed for standard 120 outlets and I'm unclear how/if I could mount the box above:
I've searched for installation videos and articles for outdoor outlets, but gave up after over 20 in a row showed them being installed against the side of a house.
I could, of course, cement a 2×4 into the ground to attach the box to, but besides being ugly I feel like nailing a high voltage electrical device to a flammable stick may be a bad idea. I suspect code would agree with that.
What is the appropriate way to 'mount' a box like the one I show above so that it is held securely away from the ground? What, specifically is that type of post called? Or is the box above the wrong product for my application?
Best Answer
My 240v stuff is all nailed to a flammable box, which I live in. - A 4"x4" should be fine. Use any visually acceptable piece of painted wood, vinyl, or painted metal; you don't need a bespoke "240v box post". Use a large radius bend between the horizontal underground run and the vertical, attach the vertical conduit to the post, and pour concrete around both post and conduit. This will constitute a permanent installation.