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Chapter 10  Wire and Conductors 175

        adaptable to all appliances and equipment that use that volt-     Bent Pipe Handle
        age. Cords used for 240-VAC service are generally used to
                                                                               Rubber Grip
        provide a little more reach for major appliances, such as win-
        dow air conditioners.  Twist-lock cords are common in the
                                                                       Tee
        shop environment to reduce accidental disconnections and                     Lock Nut
                                                                           Pipe Nipple
        reduce theft.                                                                   Plywood Disk
           Plug strips, as shown in Figure 10-16, are tucked in                                Bolt
        behind nearly every computer and stereo system in the coun-
        try. These handy assemblies provide a convenient method to                                      Crank
        connect several low-current appliances to a central location.
                                                                   Bent Pipe
        They are typically supplied with a main power switch and    Base
        line fuse.                                                                                     Carriage Bolt
                                                                             Spacer
                                                                                                         Pipe Cap

                                                 Power Switch                             Handy Box
                                   Fuse                                                      Receptacle
                                                                                               Cover Plate
                           AC Outputs
                                                              Figure 10-18 Shop Built Extension Cord Reel
                         Cabinet


                                                              drop to a remote work site. The disks are made from ordinary
                                                              plywood and the frame is constructed from water pipe, a tee,
                                                              and cap. The reel spacers are cut from small water or gas
        Mounting Tab
                                                              pipe while the fasteners are hardware store carriage bolts.
                                                              The output is a handy box that is screwed to the outside
                      AC Input
                                                              disk.
        Figure 10-16 Plug Strip
                                                                 Welding cables are also difficult to keep coiled and stored.
                                                              A simple four post cable reel can be constructed as shown in
                                                              Figure 10-19. The mount is an ordinary pipe flange and the
           In the shop environment overhead extension cord spools,  axle is a nipple with screw on cap.
        as shown in Figure 10-17, are extremely handy devices. They
        provide convenient access to electrical power, keep the shop
        floor free from tripping hazards, and are easily retracted when
        not in use.
           Extension cords can be very difficult to keep rolled up. To this        Bent Steel Bar
        end, an extension cord reel is a very useful tool. Figure 10-18                  Hub Plates
        shows a simple extension cord reel intended to provide a power            Pipe Cap
                                                                 Spacer
                                                               Pipe Flange
                                                                                  Pipe Nipple

                                                Overhead                              Crank Handle
          Overhead
           Outlet                                              Figure 10-19 Four Post Cord Reel for Heavy Duty Cable
             Twist-Lock
             Connector                     Reel


                                                              Wiring Harness
                                           Stop Ball
                         Power                                Inside of almost all electromechanical equipment, there exists
                         Connect                              a need for custom cable or wiring harnesses. Wiring harnesses
                                   Cable
                                                              are simply cables that are made up with wires, gauges, shield-
                                                              ing, and terminations specific to the equipment that they
                                                              serve. A perfect example of wiring harness is found under the
                                                              hood of any modern automobile. Wiring harnesses are made
                              Receptacle
                                                              up in advance and even a complex wiring system can be easily
        Figure 10-17 Overhead, Self Retracting Extension Cord Reel  installed in just few minutes.
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