How Far Can You Run 12 2 Wire Underground

Romex 12 2 underground how far can i run my father in law has run 12 2 romex 700 ft underground to supply a battery charger at the front gate.

How far can you run 12 2 wire underground. Actually it s ok for underground use as long as it s inside conduit. Uf underground feeder can be direct buried. You need to know the length of the wire run and the load current that will be on the circuit. Conduit sleeves should be used for protection on the vertical entrance and exit to the trench.

I did a 50 foot run and just primed each piece of conduit fed the wire through piece by piece as i laid the conduit and then cemented and joined each section. The cost of conduit also interlocks with the thickness of wire as smaller wires need smaller conduit. Is that too far for 12 2. As an example for a 120 volt circuit you can run up to 50 feet of 14 awg cable without exceeding 3 percent voltage drop.

You can in some sizes buy direct burial wire that must be buried 24. To determine the load add up the wattage of all electrical devices that will be on the circuit and divide this total by the voltage of the circuit usually 120 volts or 240 volts. Thanks august 31st 2008 01 59 pm 2. Standard romex is not waterproof and therefore cannot be used outdoors.

I want to run some 12 2 wire nm b to my shed in some conduit about 25ft long to some 20a receptacles with a 20a light switch i know about the switch being 20a but i like it to meet the wire specifications. 300 2 pvc conduit legal to bury 18 deep. Around 75 feet is all i would run it. My question comes down to how long can i run 12 2 wire without it losing current through distance.

The nec recommends you never run the wire so that you have a voltage drop of over a 3 6 volts. Ditto to the above though romex is a royal pain to pull through conduit. As some examples of cost for conduit alone. The following are the maximum lengths of cable you can use while still maintaining a 3 percent voltage drop for the given wire size awg and circuit voltage.

If the run is over 75 feet then i would switch to 12 gauge on a. What would be a safe recomendation for this application. Running underground cable run electrical cable in pvc conduit at least 12 inches deep in the ground. That s a lot of trenching for 350 consider the cost difference there.