BX clamp was placed in knock-out hole in box through  which   flexible   wire   passed  previously.

Extending a power outlet or replacing an unsatisfactory one is a common electrical job in homes, garages and shops. The accompanying picture sequence shows a typical Sunday-morning operation of this kind on a garage receptacle that was becoming dangerous. Flexible armored cable ("BX") is illustrated, but exactly the same technique is used for thin-wall conduit or non-metallic cable.

Caution: Kill the circuit first by opening the main switch or the circuit fuse. ·

Holes for fastening screws of box were made in cement wall with 3/16" star drill and hammer.

Fiber-and-lead  screw  anchors  were  pushed  into holes;   these   give   a   solid   foundation   for   box.

Box for receptacle was mounted with two No. 10 wood screws,  securely anchored in lead plugs.
 
Short length of BX between switch and new box is   connected   to   duplex   receptacle   as   shown.

At switch box, ends of BX are connected where flexible leads were connected before. Match wires.
 
Finished installation offers two outlets instead of one, is completely protected, will last a long time.

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