Final answer:
The correct answer to the question about the disconnecting means for an appliance that is not over 300 watts is 1/8 horsepower (hp). This is related to electrical safety standards which are designed to protect from overloading and potential hazards.
Step-by-step explanation:
An appliance disconnecting means may be a branch-circuit switch or breaker if the appliance is permanently connected and not over 300 watts or 1/8 hp. The options given relate to horsepower, which is another unit of power often associated with the output of electric motors. The correct answer to the fill-in-the-blank question is 1/8 hp. This is a standard stipulation in electrical codes which helps ensure safety by preventing overloading the circuit with an appliance that draws too much power. Circuit breakers and fuses are designed to protect appliances and individuals from electrical hazards such as over-currents leading to thermal overload, and they are rated in amperes to ensure proper protection.
Understanding the ratings and capacities of circuit breakers is crucial to residential and industrial wiring safety. For instance, safety regulations limit continuous use to 80% of the breaker's current capacity, typically leading to maximum continuous loads of 1,400 W on a 15-amp breaker and 1,920 W on a 20-amp breaker. When selecting a disconnecting means for an appliance, it's important to consider both the wattage and horsepower ratings to prevent electrical mishaps and ensure compliance with safety standards.