A method for protectively enclosing electrical cables (10, 12) wherein a portion of at least one cable is sealably disposed in the interior of a housing, includes the steps of placing a pressure-relief valve (36) in communication with the housing interior, the pressure-relief valve (36) being selected to pass an encapsulant therethrough on exposure to a predetermined pressure in said housing interior, and introducing an encapsulant under pressure into the housing interior until the encapsulant passes through the pressure-relief valve (36). The encapsulant introduction step is practiced by providing a pump (40) having an inlet and an outlet, placing the pump inlet in communication with the housing interior and supplying encapsulant to the pump inlet directly from a bulk encapsulant container (44).