- 1). Dig a trench from your home to your shed at least 24 inches deep using a trenching shovel or a gas-powered trencher. The National Electrical Code requires direct-burial electrical cable to be buried 18 inches deep. Check with your city or municipality, as local codes override the NEC.
- 2). Drill a hole through the exterior of your house below the service panel location and just above the foundation using a wood or masonry drill bit. The hole should accommodate the diameter of the electrical conduit that protects the underground feed cable between the structure and the trench. The size of the hole will depend on the size of the UF cable, anywhere from 3/4 inch to 1 1/4 inch in diameter.
- 3). Insert a 4-inch piece of electrical metallic tubing through the exterior wall of your home. Install a set-screw connector to the end of the EMT. The LB fitting allows you to pull the wire through the EMT at a sharp 90-degree bend. Tighten the screw to hold the connector to the end of the EMT.
- 4). Twist an LB fitting onto the threaded end of the set-screw connector. Thread a set-screw connector into the remaining opening on the LB fitting.
- 5). Cut an 18-inch length of EMT using a hack saw. Attach a set-screw coupling onto one end of the EMT. Slide a 45-degree EMT elbow into the coupling. Slide the opposite end of the EMT into the set-screw connector and tighten the screw.
- 6). Install the EMT into your shed, repeating the Steps 2 through 5.
- 7). Pull the UF electrical cable from the service panel location, through the EMT and to the trench. Lay the UF cable in the trench leading from your house to your shed. Feed the UF cable through the EMT and into your shed.
- 8). Cover the UF cable with the dirt you removed from the trench.
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