Gfci Protected Underground Feeder Cable

Bury uf cables 24 inches below the soil surface and 18 inches deep when protected by 2 inches of concrete.

Gfci protected underground feeder cable. Use a direct burial cable placed in the soil without conduit. Article 240 overcurrent protection. Underground feeder uf b solid or stranded type thhn thwn conductors are laid parallel with an uninsulated grounding conductor with overall outer pvc jacket. Gfci protected circuit to an outdoor pole light run under a paved driveway is.

Initially it was only required for temporary wiring at construction sites and in dwelling unit bathrooms but in recent years. Deep direct burial of type uf underground feeder cable is another easy alternative. Article 300 wiring methods. Both methods have to be gfci ground fault circuit interrupter protected before the wires enter the ground to guard against electrocution in case.

Underground wire for a residential circuit usually is installed with underground feeder uf cable which is rated for outdoor use and direct burial such an installation is typical when running a circuit to an outdoor location such as a garage shed or other outbuilding or to a yard light or water feature. Lighting track in residential installations shall not be cut to length in the field unless permitted by the. On in ground pools there must be at least one gfci protected convenience outlet located between 6 feet and 20 feet from the edge of the pool. Underground feeder cables labeled uf can be buried without additional protection from conduits because they have a tough jacket designed for burial.

Since 1971 the nec has expanded the requirements for ground fault circuit interrupters gfci to protect anyone who plugs into an electrical system. A second method 12 in. Article 250 grounding. We recommend the pvc conduit because it offers more protection against physical damage.

Known as uf for underground feeder the cable has a heavier plastic sheathing than the romex used inside the house. Most of the rules involve protection of the wiring from damage. Article 310 conductors for general wiring. At 18 inches you can use thwn 2 conductors inside a continuous length of pvc conduit which protects the wire all the way through the trench to the house.

As with installing indoor wiring there are some rules to follow. Three phase four wire delta service. Article 408 switchboards and panelboards. Permitted for use underground including direct burial in earth as feeder or branch circuit cable where provided with overcurrent protection.

Outlet receptacles for general use can be no closer than 20 feet from a pool or in ground spa if they are not gfci protected and no closer than 6 feet away if they are gfci protected. For a 12 in deep trench you can direct bury gfci protected underground feeder cable with a short length of pvc conduit at the house.