Provide optional standby power connections in accordance with Article 702 of the National Electrical Code, ANSI/NFPA 70 and the CEC. They also have the capability of switching two loads between one power sources. Plays 3 crucial roles in today’s commercial and industrial settings: 1) isolate power in daily activities 2) provide an effective way to interrupt power in an emergency and 3) provide lockout in sight disconnect.