What standard does not require ground fault protection for snow melting?

Snow melting systems typically do not require ground fault protection due to their design and the manner in which they are installed. These systems are intended to operate in specific conditions that are less prone to the issues addressed by ground fault protection. For instance, snow melting systems are often installed in locations with proper drainage which reduces the accumulation of water that could create a fault hazard.

In contrast, concrete surfaces and exterior winter decks can be exposed to moisture and varying environmental conditions, increasing the risk of electrical faults. Indoor heating systems also require ground fault protection as they often operate in environments where moisture can be present, further justifying the need for safety measures. The standards governing these systems acknowledge their different operating environments, leading to variations in the requirements for electrical safety measures such as ground fault protection. This distinction helps ensure greater safety without imposing unnecessary burdens on other systems that may inherently be less risky.