Abstract: A hose-to-wall fitting for attachment to one end of a current-carrying flexible hose to enable such hose to be connected through a wall-mounted current-carrying inlet valve to both (1) a source of vacuum and (2) dual sources of electrical power, e.g., a high-voltage source for powering a motor or the like, and a low-voltage source for powering a control circuit or the like through a switch built into the handle/wand fitting attached to the other end of the hose. The high-voltage male contacts of the hose-to-wall fitting can be reversed to enable use with the types of inlet valves which incorporate only the connections to the source of vacuum and to the low voltage source, or only the connection to the source of vacuum, the high-voltage connection being made in either case through a short electrical cord to a conventional electrical outlet.

Abstract: A current-carrying flexible hose having at least two parallel helical support wires, inner and outer plastic strips wrapped helically about the support wires, and at least one pair of helical electrical conductors disposed on opposite sides of one of the support wires and slidably positioned between the inner and outer plastic strips. Each of the helical electrical conductors comprises a conductive element and a plastic dielectric coating disposed around the conductive element. The plastic dielectric coatings are not bonded to the inner and outer plastic strips so that they may slide therebetween.