For installation compliance, how must branch circuits larger than 50 amperes be designated?

The requirement for installing branch circuits larger than 50 amperes is specific to ensuring that such circuits are properly labeled and designated for their intended use. In this case, the designation of these circuits is crucial for safety and compliance with electrical codes.

The correct designation for branch circuits larger than 50 amperes is that they must be labeled for their specific usage, which often includes their designation as circuits for major appliances, such as ranges or ovens. These appliances typically require higher current capacities, and designating the circuits accordingly ensures that the installation meets safety regulations while providing adequate power for the appliance's operation.

When branch circuits are categorized or labeled as being specific to ranges, it highlights the necessity of ensuring that these circuits are installed in such a way that reflects their intended use, which ultimately enhances safety by preventing overload and ensuring the circuit is solely used for its intended purpose. This is particularly important in commercial or residential settings where improper circuit usage could lead to hazardous conditions.

While the other designations may refer to different types of circuits, they do not encapsulate the requirement and specificity necessary for high-capacity circuits such as those exceeding 50 amperes. Therefore, identifying large branch circuits explicitly for ranges aligns with the compliance requirements of installation practices.