What is the wattage limit for resistance type heating elements in outdoor electric snow-melting systems?

The wattage limit for resistance type heating elements in outdoor electric snow-melting systems is set at 120 watts per square foot. This limit is important because it ensures that the systems are not only effective in melting snow and ice but also comply with safety regulations and standards that prevent overheating and potential fire hazards.

Using 120 watts per square foot allows for efficient heat distribution over the area to be cleared, promoting effective melting while managing energy consumption. It strikes a balance between performance and safety, making it the appropriate choice for these systems. This limit is established in various electrical codes and guidelines to ensure consistent performance and safety across installations of snow-melting systems.