means of a probe or tool.

AUTOMATIC RECLOSURE - Denotes the act of a ground-fault circuit-interrupter resetting itself

after having been tripped.

CLASS A - Class A, when applied to a ground-fault circuit-interrupter (GFCI), is an interrupter that will interrupt the circuit to the load when the ground-fault current is 6 mA or more but not when the ground-fault current is 4 mA or less.

CORD-CONNECTED - Denotes connection to a supply circuit by way of a flexible cord

terminating in an attachment plug.

DOUBLE INSULATION - The insulation system resulting from a combination of functional and

supplementary insulation.

ENCLOSURE - A surrounding case constructed to provide a degree of protection against incidental contact with the enclosed equipment and to provide a degree of protection to the enclosed equipment against specified environmental conditions.

ENERGIZED PART - A part at some potential with respect to another part, or to earth.

FUNCTIONAL INSULATION - The insulation necessary for the proper functioning of the device,

and for basic protection against electrical shock hazard.

GFCI RECEPTACLE END OF LIFE - When a GFCI receptacle is incapable of passing its internal

test function it has reached its end of life.

GROUND FAULT - Denotes an unintentional electrical path between a part operating normally at

some potential to ground, and ground.

GROUND-FAULT CIRCUIT-INTERRUPTER - In the US and Mexico, a device intended for the

protection of personnel that functions to de-energize a circuit or portion of a circuit within an established period of time when a current to ground exceeds some predetermined value that is less than that required to operate the overcurrent protective device of the supply circuit.

In Canada, a device whose function is to interrupt, within a predetermined time, the electrical circuit to the load when a current to ground exceeds some predetermined value that is less than that required to operate the overcurrent protective device of the supply circuit.

HOUSING -The integral envelope directly surrounding the circuit components of the ground-fault

circuit-interrupter.

LEAKAGE CURRENT - Denotes all currents including capacitively coupled currents which may be conveyed between energized parts of a circuit and (1) ground or (2) other parts.

OUTLET-BOX TYPE GROUND-FAULT CIRCUIT INTERRUPTER - A permanently connected

ground-fault circuit-interrupter provided with a mounting yoke for mounting in an outlet box; may or may not be provided with receptacle outlets. May be referred to as a receptacle-type GFCI.

PERMANENTLY CONNECTED - Denotes connection to a supply circuit by way of fixed electrical

conductors (see cord-connected).

PORTABLE GROUND-FAULT CIRCUIT-INTERRUPTER - A plug-in type ground-fault circuit interrupter provided with male blades for connection to a receptacle, or one that is cord-connected. (See cord-connected).

RATED CURRENT -The marked value of current.

RATED VOLTAGE - Voltage assigned by the manufacturer.

REINFORCED INSULATION - An insulation providing protection against electrical shock hazard

that is equivalent to double insulation.

ROOM TEMPERATURE - Air at 25.0 ±5.0°C (77.0 ±9.0°F).

SHOCK HAZARD- A shock hazard is considered to exist at a part of a ground-fault circuit interrupter if:

a) There would be current of 6 mA or more in a resistance of 500 ohms connected between

the part in question and the grounded supply conductor, and

b) The device would not operate to open the circuit to the 500-ohm resistor within the time

allowed in UL943 6.7.1.1.

SUPPLEMENTARY INSULATION - An independent insulation provided in addition to the

functional insulation to insure protection against electric shock hazard in the event that functional

insulation should fail.

TRIP - Denotes automatic interruption by the ground-fault circuit-interrupter of the electric circuit

to the load.