According to standards, luminaries in Class II, Division 2 locations with rigid stems longer than 12" require what?

For luminaires in Class II, Division 2 locations with rigid stems longer than 12 inches, the requirement for bracing against lateral displacement is critical to ensuring safety and reliability in potentially hazardous environments. This standard is established to prevent the risk of physical damage or displacement of the luminaire due to environmental factors or operational activities.

In such locations, materials that could produce flammable or explosive dusts are present, so it’s essential to maintain the integrity of the lighting fixtures. If the stems are not properly braced, they could sway or fall, potentially creating a hazardous situation. Bracing provides stability and helps to prevent accidents that could ignite the surrounding materials or create a dangerous working environment.

The other options are not relevant to this specific requirement. Dimmer switches, non-conductive materials, or tinted glass covers do not address the crucial need for physical stability that bracing provides in these special locations. Thus, ensuring that luminaires are securely installed and resistant to displacement is a primary safety measure in maintaining operational integrity in Class II, Division 2 settings.