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The fuse is protected by a sliding plastic cover, which requires the power lead to be removed before it can be opened. A power entry module (PEM) is an electromechanical component used in electrical appliances, integrating the appliance inlet with other components such as: a switch, possibly including integrated or remote bowden cable actuation;
There are several alternatives for connecting newer appliances to two-prong receptacles without rewiring the building: removing the grounding pin of the plug (unsafe), replacing the receptacle with a three-prong outlet (unsafe without proper ground), or replacing the receptacle with a Ground Fault Circuit Interrupter (GFCI).
A plug is the connector attached to an electrically-operated device, often via a cable. A socket (also known as a receptacle or outlet) is fixed in place, often on the internal walls of buildings, and is connected to an AC electrical circuit. Inserting ("plugging in") the plug into the socket allows the device to draw power from this circuit.
Theoretically, such protection could have been designated either within the socket or within the plug. However, to ensure that this protection has a rating matched to the appliance flexible cord fitted to the plug, a fuse rated between 1A and 13A is incorporated into each plug. The fuse in the plug would be sized to protect the flexible cord ...
An outlet is defined by the NEC as "a point in the wiring system at which current is taken to utilization equipment". [1] This definition includes receptacles, lighting, motors, etc. Ordinary switches control but do not consume electricity, and therefore are not defined as outlets in this sense.
Some fuses allow a special purpose micro switch or relay unit to be fixed to the fuse body. When the fuse element blows, the indicating pin extends to activate the micro switch or relay, which, in turn, triggers an event. Some fuses for medium-voltage applications use two or three separate barrels and two or three fuse elements in parallel.