⭐️Compatibility: This interlock kit for Thomas and Betts, Challenger and Westinghouse 150 or 200 amp panels, the spacing between main and the closest generator breaker is 1 to 1 1/8''. ⭐️Durability: The generator lockout kit is made of corrosion-resistant and high hardness aluminum alloy. ⭐️Anodization: Our interlock switch has been treated with surface anodized, electrical insulation, heat insulation, safer. ⭐️Package Content: Interlock x1; safety labels x6; 11.8''generator breaker retainer straps x2; 3/16 drill bit x1; Installation guide x1 ⭐️Note: If the breaker interlock doesn't work properly, DO NOT USE it and contact us immediately for support and instructions! The panel interlock is compatible with Thomas and Betts, Challenger and Westinghouse 150 or 200 amp
breaker panel box and the spacing of main and generator circuit breaker is 1 to 1 1/8 inches.
Please measure the spacing between main and generator branch breaker before purchasing.