Designation of rating given in amperes at which the device will not trip. A specific temperature is usually assigned.

Designation of rating given in amperes at which the device will not trip. A specific temperature is usually assigned.

Refers to those breakers in which the electrical contacts remain open after a trip until someone physically closes or completes the circuit either by pushing a reset button or throwing a switch.

The highest level of overload current that devices will interrupt and remain in operable condition, capable of clearing additional overloads.

Refers to the temperature of the air immediately surrounding the circuit breaker/protector.

A device which will automatically open an overloaded circuit. It will also automatically close or complete the circuit after a period of time. If the overload is still present, the device will continu [..]

The total excess resistance in a two-contact system, beyond the bulk of body resistance of the contacts.

A distance measured across a surface between two parts of a device.  Usually this distance is between two electrically conductive parts. 

Canadian Standards Association (similar to UL).

The ability of an insulating material to withstand an impressed voltage without exceeding minimal leakage current or breakdown. Specified in voltage (VAC), usually between a live metal part and ground [..]