Circuit breaker with plug on neutral connection lock-out mechanism

A circuit breaker preventing electrical connection between a power line source and a load when a neutral rail is disconnected from the circuit breaker, the circuit breaker comprising:

• a casing;
• a line connector affixed to one side of the casing;
• a load connector affixed to an opposite side of the casing;
• a neutral plug-on line connector having an upper jaw half and a lower jaw half allowing the neutral rail to be plugged on between the upper and lower jaws halves;
• a trip mechanism including a handle, the trip mechanism having an on position allowing electrical connection between the line connector and the load connector, a tripped position interrupting electrical connection between the line connector and the load connector in response to detection of at least one fault condition, and an off position, wherein the handle must be moved to the off position to reset the trip mechanism to the on position;
• a trip link coupled to the trip mechanism, the trip link having a first position preventing the trip mechanism from being reset to the on position and a second position allowing the trip mechanism to be reset to the on position;
• and
• a neutral lock mechanism coupled to the neutral plug-on line connector, the neutral lock mechanism including a spring coupled to the casing that retains the trip link in the first position when the neutral rail is unplugged from the neutral plug-on line connector, the neutral rail causing the neutral lock mechanism to actuate the spring when the neutral rail is connected between the jaw halves of to the neutral plug-on line connector allowing the trip link to move to the second position.