There are a few different types of extension cords that are compatible with EVs. The most common type is the J1772 extension cord (non-Tesla). This cord is used with Level-1 and Level-2 charging stations. The other type is the NEMA extension cables that connect the power supply and the charger. A third type of extension cable is a male-to-female cable for the Tesla (NACS) connector L1, L2, and L3.