Method to make safe an ungrounded electrical receptacle and appa

Details Method to make safe an ungrounded electrical receptacle and appa Method to make safe an ungrounded electrical receptacle and appa

1992-03-11

1993-12-14

Bradley, Paula A.

Electrical connectors

With contact preventer or retractable cover part

Dummy connector

439489, 439135, H01R 1344

Patent

active

052696979

ABSTRACT:
A method is taught whereby an ungrounded safety electrical receptacle or outlet is made incompatible with a three-pronged safety plug, thereby to warn the user that the receptacle is not grounded. The method employs various fillers to fill or otherwise block entry to the hole in the outlet that receives the grounding prong of the safety plug. Labelling of the receptacle employing the filler is included. The various fillers for use in the method are also claimed, as are labelling techniques.

REFERENCES:
patent: 1726166 (1929-08-01), Sparks
patent: 1955513 (1934-04-01), Petersen
patent: 4806112 (1980-02-01), Roberts et al.

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