A method of manufacturing a motor, which begins with robotically positioning a flexible insulating sleeve over a first motor sub-assembly to produce a second motor sub-assembly. The first motor sub-assembly includes a motor assembly and an end-cap. The motor assembly includes a stator, a rotor, and wiring connected to the stator. The end-cap includes an electrical fitting for feeding the wiring externally of the motor. The method continues with robotically positioning a flexible enclosure, that includes a formed housing section and a connecting section, loosely over the second motor sub-assembly. The method continues with tightening the connecting section until the formed housing section tightly fits over the second sub-assembly compressing the flexible insulating sleeve to produce an insulating seal.