What is a proper safety measure for an oil heating unit's power supply?

A firematic disconnect switch is a critical safety measure for an oil heating unit's power supply because it allows for the safe and quick disconnection of the power in the event of an emergency, such as a fire. This type of switch is typically located in an accessible position and is designed to be easily operated by anyone needing to cut the power quickly. The functionality of the firematic disconnect switch ensures that if there is a malfunction or fire, the unit can be shut down immediately, reducing the risk of further hazards.

In contrast, keeping the power supply always on, having a backup power source, or never turning the unit off does not directly address safety in emergencies and could potentially create additional risks. Maintaining proper power control and having an easily accessible method to disconnect the unit can significantly enhance overall safety.