Shovel the concrete into the posthole atop the gravel, being careful not to get any into the conduit or on the wires. Fill the hole to grade or just below it, leaving about 6 inches of conduit exposed. Using a concrete float or a piece of scrap wood, smooth the top of the footing.
Tip: Use your shovel to chop gently at the concrete as you fill the hole, which will help eliminate air pockets.
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Masonry hoe and wheelbarrow
to cut PVC conduit
Shovel and concrete float
Rope or strapping and stakes
(the fixture that sits atop the post). Lanterns and posts usually sold separately.
These come in only a few styles: fluted, not fluted, with or without a crossbar. It's best to order posts from the same manufacturer as your lantern, to ensure that the finishes match.
You'll need enough UF-rated exterior wire to reach from inside the house to the post outside, plus an extra 9 feet to run up through the post. 12-gauge wire will suit both 15-and 20-amp circuits.
To meet code for burying wires undergorund, you'll need 3/4-inch "Schedule 40" PVC pipe. Get enough elbows and couplings to make any necessary turns coming out of the house, down to the trench, and up to the post from the ground.
5. PVC CEMENT
to adhere the conduit together
6. 3/4-INCH GRAVEL
to fill the bottom 6 inches of the posthole
7. CONCRETE MIX
Two 80-pound sacks should be enough to creat a 12-inch wide and 16-inch-deep footing.
8. WIRE NUTS
to connect the wiring on the lantern. These are color coded by size; yellow should work for 12-gauge wires, but be sure to also check the range of sizes on the packaging.