Electricians Know The Right Conduit For Your Electrical Repairs
Underground cable for running electrical power to a remote location can be installed at different depths, depending on the type of conduit and type of wire used. If you’re considering running a power line underground through your yard, you have four options. Your choice depends on how much power you want. It also depends on your soil type—if it’s sandy and easy to dig, save money by digging deep (you won’t need to use metal conduit). If it’s rocky or clay, then you will need to keep all digging to a minimum. Consult certified electricians in Houston first, or whichever city you might be in.
Whichever method you choose, be sure to include a service entrance ell, which has a removable cover to give you access to the inside wires, above ground level. And get a permit and talk to your inspector about local codes before starting. Quality Electricians in Houston will obtain these permits with ease, which means less work for you.
Decide how much digging you’re prepared to do, which determines the type of wire you need to use. At 6 in. deep, use galvanized metal rigid electrical conduit (1/2-in.-diameter is large enough for the water feature) and run individual conductors inside. The conductors need to be waterproof, so look for a “W” on the label, as in THWN-2. This method lets you run any size circuit. The downside is the cost—1/2-in. metal conduit is over a dollar a foot. If you have soil that’s tough to dig, or you only need to run the cable a short distance, go this route to minimize digging. Always best to leave difficult electrical repair to a certified Electrician in Houston.
At 12 in. deep, use direct-bury UF-B (underground feeder) cable, provided it meets three criteria: It has GFCI protection before it enters the ground, is limited to 120 volts (enough for your fountain), and is protected by no more than a 20-amp fuse or breaker. We recommend this for your situation—it’s only 1 ft. deep and you don’t have to put the cable inside expensive conduit. This is the best choice if you only need to power your water feature.
At 18 in. deep, run THWN-2 conductors inside PVC conduit. This method lets you run any size circuit, so it’s a good idea if you want to run electricity to other items besides your water feature.
At 24 in. deep, run direct-bury UF-B cable. There’s one restriction: It needs a conduit where the cable is exposed on the outside of the house and to 18 in. below the ground. Burying the cable 24 in. requires more digging, so this method only makes sense if you have easy-to-dig soil or are renting a trench digger.
Electrical conduit, whether it be metal (EMT), plastic (PVC), or flexible conduit, each have their own maximum number of electrical wires allowed in the conduit. Their fill capacities are different, even though they may be the same sized conduit.
PVC is a plastic conduit that is often used for underground installations and in wet areas. This conduit comes in ten foot lengths and comes with a coupling formed on one end. PVC can be combined by gluing the male end of one stick of conduit to the female end using PVC glue. Since PVC is thicker than metal conduit, it holds fewer wires.
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