For example 310 17 60 degree 2 uf cable in free air is good for 110 amps.
Type uf cable in conduit.
For a 6 in deep trench use galvanized rigid metal electrical conduit with individual conductors inside.
Downside to using type uf in conduit is the need for larger conduit more money and the significantly more work to install for in my opinion zero gain.
3 nonmetallic raceways listed for direct burial without concrete encasement or other approved raceways.
Complete listing of electrical wire types.
Out of an underground trench that is 24 inches deep.
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.
Type uf cable is the most commonly used nonmetallic cable for residential outdoor wiring runs.
Wiring in pvc conduit must have at least.
Electrical cable depth options.
Although not commonly done it is allowable to run uf cable but not nm cable through metal or pvc conduit in an underground application.
Type of wiring method or circuit.
4 residential branch circuits rated 120 volts or less with gfci protection and maximum overcurrent protection of 20 amperes.
In most cases this also applies to interior wiring projects as well except where subject to physical damage such as where the cable exits the ground.
Running uf cable through metal or pvc conduit.
Much much easier to work with than uf.
Electrical wire for the home.
Type uf b cable is made for direct burial underground without the use of conduit or other piping and is also gray in color and is marked as type uf b cable to denote the difference between it and the regular type uf cable which is not suitable for direct burial outside of conduit or the proper piping material.
Uf cable in conduit.
Uf cable can be direct buried without conduit with a minimum of 24 inches of earth cover.
As mentioned above uf electrical wire does not require the use of conduit or any other type of protective covering.
1 direct burial cables or conductors.
Wiring buried inside rigid metal rmc or intermediate metal imc conduit must have at least 6 inches of earth cover.
Table 310 17 says that conductors in free air can have a higher ampacity than conductors in conduit see 310 16.
2 rigid metal conduit or intermediate metal conduit.
Then conduit normally electrical pvc is required.
This type of cable is designed to withstand direct exposure to the soil and moisture and is rated for wet dry and damp environments.
Decide how much digging you re prepared to do which determines the type of wire you need to use.
More heat 310 16 2 uf cable in raceway cable or earth on allowed 95 amps.
Direct burial cable can be run inside the conduit to add additional protection to any electrical system.
If you are going to run conduit anyway it is best to then run type thwn or thhn thwn individual conductors.
Where a pvc conduit may sleeve the uf cable as it leads up out of the ground to an electrical box.
Type uf cable is usually gray and comes in rolls that look like standard.
Location of wiring method or circuit.
