Rigid Industries 24 Volt Relay. If your project has a 24V electrical system you will need to replace the 12V relay with this 24V relay for proper functionality. Specifications for Rigid Industries 24 Volt Relay: Manufacturer: Rigid Industries Color: Black Features of Rigid Industries 24 Volt Relay 24 Volt Relay Standard relays included with Rigid Industries wire harnesses are 12V. If your project has a 24V electrical system you will need to replace the 12V relay with this 24V relay for proper functionality. Package Contents: Rigid Industries 24 Volt Relay Rigid Industries 49024: 24 Volt Relay