In what range of amp ratings are motor overload heaters generally available?

Motor overload heaters are typically designed to protect motors by interrupting the circuit when the current exceeds a safe threshold, thereby preventing damage to the motor. They are commonly available in various ranges to cater to different motor sizes and types.

Choosing fractions of an amp as the correct answer reflects the fact that overload heaters must adapt to motors that have small operational currents. This is especially relevant in applications involving smaller motors, where precise current limitation is crucial to avoid damage due to overheating but also to ensure proper operational efficiency. Many overload heaters come in sub-1 amp ratings, allowing for effective protection of smaller motors found in commercial food equipment and appliances. This flexibility is essential when dealing with varying motor types that may operate at lower current levels.

The other ranges mentioned may apply to larger motors but do not encompass the entirety of motor current ratings, particularly in small-scale applications typical of the food service industry. Therefore, recognizing that overload heaters are available in fractional amp ratings is crucial for understanding their application across a broad spectrum of motor sizes.