This post Can I Use a 240V Breaker on a 120V Circuit and Vice Versa? appeared first on ELECTRICAL TECHNOLOGY. Is It Permissible to Use a Double Pole 240V Breaker on a 120V Circuit, or a Single Pole 120V Breaker on a 240V Circuit? Over current protective devices (OCPDs) such as fuse and circuit breakers are safety devices with specific voltage and current ratings to protect electrical circuits. Circuit breakers are sized based on wire … Visit the Can I Use a 240V Breaker on a 120V Circuit an...