A well pump assembly, comprising: an electrical motor for driving a pump, the motor having a motor housing filled with a dielectric motor lubricant; a motor head on an end of the housing, the motor head having at least one motor lead passage extending from an interior of the housing to an exterior of the motor head, the motor lead passage being in fluid communication with the motor lubricant; a motor lead extending from the exterior of the motor head into the motor lead passage; wherein the motor lead comprising a metal tube containing an insulated conductor; a motor wire extending from inside the motor housing into the motor lead passage, the motor lead and motor wire having electrical terminals on their ends that connect to each other within the motor lead passage; an outer seal sealing around the motor lead in the motor lead passage, the outer seal having an outer side adapted to be exposed to well fluid; an inner seal sealing around the motor lead in the motor lead passage inward from the outer seal, the inner seal having an inner side in contact with the motor lubricant in the motor, the outer and inner seals defining between them an annular space in the motor lead passage; the inner seal and the outer seal being outward from the electrical terminal; each of the outer and inner seals comprising a ferrule (59a, 59b, 59c and 61a, 61b) that forms a metal-to-metal sealing engagement between the metal tube and the motor lead passage; a barrier fluid passage extending into the annular space and containing a barrier fluid that is in contact with an inner side of the outer seal and an outer side of the inner seal; and a pressure compensating device having an inner side in contact with the barrier fluid in the barrier fluid passage for reducing a pressure differential between the barrier fluid and a hydrostatic fluid pressure of well fluid on the exterior of the motor. an electrical motor for driving a pump, the motor having a motor housing filled with a dielectric motor lubricant; a motor head on an end of the housing, the motor head having at least one motor lead passage extending from an interior of the housing to an exterior of the motor head, the motor lead passage being in fluid communication with the motor lubricant; a motor lead extending from the exterior of the motor head into the motor lead passage; wherein the motor lead comprising a metal tube containing an insulated conductor; a motor wire extending from inside the motor housing into the motor lead passage, the motor lead and motor wire having electrical terminals on their ends that connect to each other within the motor lead passage; an outer seal sealing around the motor lead in the motor lead passage, the outer seal having an outer side adapted to be exposed to well fluid; an inner seal sealing around the motor lead in the motor lead passage inward from the outer seal, the inner seal having an inner side in contact with the motor lubricant in the motor, the outer and inner seals defining between them an annular space in the motor lead passage; the inner seal and the outer seal being outward from the electrical terminal; each of the outer and inner seals comprising a ferrule (59a, 59b, 59c and 61a, 61b) that forms a metal-to-metal sealing engagement between the metal tube and the motor lead passage; a barrier fluid passage extending into the annular space and containing a barrier fluid that is in contact with an inner side of the outer seal and an outer side of the inner seal; and a pressure compensating device having an inner side in contact with the barrier fluid in the barrier fluid passage for reducing a pressure differential between the barrier fluid and a hydrostatic fluid pressure of well fluid on the exterior of the motor.