Submersible pump wire is a multiconductor cable that connects a submersible pump controller to the motor of the pump, which is often located in a deep well. Also known as sub pump wire, it's protected by durable, plastic insulation that resists oil, lubricants, acids, ozone, and abrasion, making it ideal for wet or hostile environments. It can be used in both fresh and salt water, and it's also suitable for direct burial and within well casings. Submersible pump wire is typically used to supply electricity to wells, sump pumps, and large-scale pumping systems in residential, farming, and industrial applications.