What must all pantograph poles ensure regarding cleanliness?

The requirement for pantograph poles to be clean and dry is critical for ensuring efficient operation and safety. When pantograph poles make contact with overhead wires, any dirt, debris, or moisture can interfere with the electrical conductivity, potentially leading to increased resistance, arcing, or electrical faults. Clean and dry poles are necessary to maintain a reliable connection, optimize the flow of electricity, and minimize wear and tear on both the pantograph and the overhead wires.

Additionally, cleanliness helps prevent the accumulation of contaminants that could cause corrosion or other types of damage over time. By ensuring that pantograph poles are maintained in a clean and dry state, operators can support the longevity of the infrastructure and enhance the overall safety and efficiency of the rail system.