This device is a safety mechanism designed for use with residential electrical panels, specifically those manufactured by Cutler-Hammer utilizing the “CH” series breakers. It ensures that a generator can safely supply power to a home during a utility outage by preventing simultaneous connection of the generator and the utility power grid. This is achieved through a mechanical slide that physically interlocks the generator breaker and the main breaker, allowing only one to be in the “on” position at any given time. For example, if utility power is lost, the main breaker is switched off, and then the generator breaker can be switched on to power pre-selected circuits within the home.
The importance of this particular setup lies in preventing backfeeding, a dangerous situation where generator power is sent back onto the utility grid. Backfeeding poses a significant electrocution risk to utility workers attempting to restore power and can also damage equipment. Installing this specified component offers a safer and more reliable method of generator connection compared to extension cords running directly to appliances. Furthermore, it provides a cost-effective solution for whole-house or partial-house power during emergencies, avoiding the need for a more expensive automatic transfer switch. The concept of interlock kits has evolved over time to meet electrical safety standards and provide homeowners with a secure way to utilize generator power.
