The locomotive body was largely composed of aluminium and resin-bonded fibreglass. The main transformer was housed within a centrally-mounted power compartment, within which the rectifiers and their cooling apparatus set at one side and the transformers' oil-cooled radiator at the other. A narrow corridor ran alongside the power compartment, enabling train crews to move through to reach either cab of the locomotive. Various pieces of auxiliary equipment were installed along the walls of this corridor, including the battery charging frame and the l.t. equipment frame. Between the power compartment and the cabs at either end were insulated bulkheads, upon which equipment such as the four traction motor blowers and brake apparatus were fixed. Climate control within the power compartment was heavily regulated, with space heaters present to pre-heat the rectifiers to operating temperature, and numerous air-driven fans that maintained steady airflow towards vents set into the locomotive's roof.