Square D was established in 1902 in Detroit, Michigan, and became a trusted name in circuit breakers and safety devices before joining Schneider Electric in 1991. The brand is also known for solutions like the generator interlock for Square D panel, which enhance home backup power safety. Many electricians rely on the Square D interlock kit for dependable and code-compliant installations.

Do you need help matching an interlock kit to your panel? Send a photo of your electrical panel to: (804) 400-5803.