Safe Outdoor Interlock Kit For Portable Power, Generator Interlock Kit For Sq\. Generator Breaker Interlock Kits for Square D QO or Homeline Indoor or Outdoor with Main 150 or 200 Amp Panels EXCELFU generator interlock kit is a device that designed to allow safe powering of a home by a portable generator during power outage. This eliminates unsafe generator backfeeding situations that could potentially electrocute electric power company workers or destroy the generator. When an interlock switch is installed, it prevents the generator circuit breaker and the main circuit breaker from both being on at the same time. An interlock kit is a safe and cost-effective way to ensure you're using a portable generator safely. Feature ? Keep Your House Safe and Ready for a Power Outage ? Compatible with Square D QO or Homeline 150 or 200 Amp Indoor or Outdoor Receptacle Panels ? Do Not Require A Separate Generator Panel ? Easy to install and offers full protection Package Include ? 1 x Interlock Plate ? 3 x Shoulder Screws ? 3 x Hex Nuts ? 1 x Drill Bit ? 1 x Generator Start-Up Procedure Label ? 5 x Remind Label ? 2 x Zip Ties ? 1 x Instruction Compatibility: Generator Interlock Kit compatible with Square D QO or Homeline 150 or 200 amp panels. 1 3/8 Inch spacing between main breaker and generator breaker. Safe and Reliable: EXCELFU generator interlock kit provide a safe and cost-effective way to backfeeding of your home electrical appliances by a generator during a power outage. Ideal solution for power outages or emergency backup power to keep your home geared up and running. Solid Construction: Laser cut to ensure accurate and proper installation, prevents the generator circuit breaker and the main circuit breaker from being on at the same time. Easy Installation: The generator interlock kit comes with a 3/16 drill bit, sturdy steel that goes through breaker panel easily, does not require a extra separate panel. Comes with clear instruction and stickers lables. Complete Generator Interlock kit: 1 x Interlock Plate, 3 x Shoulder Screws, 3 x Hex Nuts, 1 x Drill Bit, 1 x Generator Start-Up Procedure Label, 5 x Remind Label, 2 x Zip Ties, 1 x Instruction and EXCELFU 100% Satisfying Customer Service, please feel free to contact us if there is any problem.