Which substance should be used to clean the armature windings on a motor?

The recommended choice for cleaning the armature windings on a motor is carbon tetrachloride. This substance is specifically effective for cleaning electrical components due to its excellent solvency properties, enabling it to remove dirt, grease, and other contaminants without leaving a residue.

When applied to armature windings, carbon tetrachloride effectively cleans the copper wire without damaging the insulation. It evaporates quickly, which helps prevent moisture accumulation that could lead to corrosion or short-circuiting. While other options, such as alcohol or acetone, might also be effective, they do not provide the same level of cleaning efficacy or rapid evaporation rate suitable for high-performance motors. Water, on the other hand, is generally unsuitable for cleaning electrical components, as it can cause rust and other issues by promoting corrosion. Utilizing carbon tetrachloride, therefore, ensures that the motor's performance and longevity are preserved during the cleaning process.