Guidelines for electrical installations are contained in the National Electrical Code (NEC). The code contains general requirements regarding the type of cable to use when installing pumps, but it gives the installer some latitude as to the specific type of cable. This article helps pump installers decide which type and size of pump cable to use.

There are two classifications of insulated multi-conductor cable used in submersible pump applications: submersible pump cable and underground feed cable, commonly known as UF. Submersible pump cable runs between the wellhead and the pump in submersible applications, and is approved by UL (formerly Underwriters Laboratories) for underwater duty. It is designed to safely carry electrical loads inside water wells so long as it is sized properly. UF, on the other hand, is used between the wellhead and the pump control panel or disconnect. Installers can often bury it in the ground, although some local codes require underground high-voltage wiring, even UF, to run in conduit. Submersible pump cable can be used between the wellhead and the control panel or disconnect, so long as it is run in conduit.