You never know what the weather will bring, or if you might lose power. This generator panel allows you to permanently connect a standby power source to specific circuits, such as lighting, heating, refrigerator, freezer, sump pump, etc. Manually switch from utility power to stand-by generator power in seconds. You can easily switch the power supply to branch circuits by turning off the utility main breaker and turning on the main breakers connected to the generator. For added safety, an easy to use rotating interlock bracket allows only one main breaker to be on the "ON" position at the same time. Plus, in accordance with the Canadian Electrical Code, 60A 3-pole utility/generator circuit breakers switch both line & neutral conductors. This unit has a large circuit breaker capacity, accepting up to 18 standard or 36 QO tandem circuits. It includes two factory installed 60A 3 pole main breakers. Suitable for generators having either bonded or unbonded neutral conductors, this is a type 1 indoor enclosure with surface/flush mounted trim. It measures 3.75" x 14.25" x 15".