What is the maximum horsepower rating for a portable motor that allows its controller to be an attachment plug and receptacle?

The maximum horsepower rating for a portable motor that permits its controller to use an attachment plug and receptacle is commonly 1/3 horsepower. This specification is significant because it aligns with safety considerations and electrical code requirements, which dictate that only lightweight applications with lower power draw should be equipped with attachment plugs.

By limiting the horsepower to 1/3 hp, the design supports ease of handling and reduces the risk of overheating or electrical hazards that could occur with more powerful motors. As power ratings increase, the associated current may rise to levels that are not safely managed by standard receptacles and plugs, leading to potential failure or hazards.

This specific limit is set through electrical safety regulations to ensure that portable motors used in various applications remain manageable and do not exceed the typical ratings for standard household or light industrial electrical systems.