Which method is NOT acceptable for cleaning insulation in auxiliary generating equipment?

The method of cleaning insulation in auxiliary generating equipment with high-pressure air is not acceptable due to several reasons. High-pressure air can potentially damage sensitive components by causing physical harm or dislodging debris that could lead to contamination of other areas within the equipment. Additionally, using high-pressure air can create dust particles that may become airborne, posing risks to the equipment and the work environment.

In contrast, using a vacuum cleaner, wiping with a clean cloth, and cleaning with an approved solvent are all more controlled methods that reduce the risk of damage. A vacuum cleaner can effectively remove loose debris without pushing particles around, while a clean cloth does not leave behind residue and is gentle on surfaces. Cleaning with an approved solvent is effective for removing grease or grime without damaging the insulation material, provided that the solvent is safe for use on the specific materials involved. These methods ensure that the cleaning process maintains the integrity of the equipment and adheres to industry standards for maintenance.