Abstract: The present technology provides a system for delivering electrical power and fluid to a heater array system for use in an in situ oil production process. The system comprises multi-component composite cable having multiple conductors for delivering electrical power to a heater array, multiple hoses for transmitting fluid to a heater array, a strength member made of a heat resistant synthetic fiber material, and a cable jacket layer surrounding the conductors, hoses and strength member. The system also comprises multiple single-heater composite cables. The single-heater cables deliver electrical power and fluid from the multi-component composite cable to a heater in the heater array. A splice protector protects the connections between the multi-component composite cable and the multiple single-heater composite cables. Each of the single-heater composite cables is connected to at least one conductor and at least one hose of the multi-component cable within the splice protector.