Why is a non-melting headliner important in hard hats used near high voltage?

A non-melting headliner is crucial in hard hats used near high voltage due to its ability to prevent electrical conduction. When working in environments with high voltages, the materials used in personal protective equipment (PPE) such as hard hats must be resistant to melting or igniting upon exposure to potential electrical arcs or flashes. If the headliner were to melt, this could compromise the integrity of the hard hat, leading to possible injuries through direct contact with electric current or resulting in electric shock.

The materials in the headliner are designed to not only withstand high temperatures but also to insulate against electrical transmission, ensuring that if a high voltage situation occurs, there is minimized risk of electrical conduction through the hard hat. This is a critical safety feature for workers in settings where electric shock could be a hazard, helping to maintain a safe working environment.

Other options, while related to safety and comfort, do not address the essential purpose of the headliner in protecting against electrical hazards.