Patent Publication Number: US-2023155314-A1

Title: Electrical safety plug

Description:
BACKGROUND 
     Refrigerated display cases and freezer cases used for storing perishable items typically include a removable bottom member, below which is located a fan plugged into an electrical outlet attached to an electrical harness. During cleaning and/or servicing of the display case and fan, the fan or other electrical devices inside the case are unplugged from the electrical outlet. During this time, the end of the outlet is exposed inside the case during the cleaning process, which could cause an electrical hazard to those near it. In addition, the exposed electrical outlet connection slots can become filled with water during the cleaning process and pose a shock safety risk. 
     While performing cleaning or maintenance, the user unplugs the electrical devices inside the case and attempts to work around or otherwise avoid contacting the outlet, which is typically resting on the bottom interior portion of the case (base) with water, cleaning equipment or the user&#39;s hands during cleaning. However, it can frequently be difficult and/or cumbersome for a user to clean around the electrical outlet while also avoiding contact with the electrical harness. 
     SUMMARY 
     Some examples provide an electrical safety plug including an electrically nonconductive plug body having a set of pins associated with a first end of the plug body and a tether connected to a second end of the plug body at an attachment point. The set of pins configured to conform to a set of pin connector slots associated with an electrical harness including an electrical outlet. A tether connection aperture associated with an anchor couple. The tether is at least partially threaded through the tether connection aperture. The anchor couple includes a first inter-locking device removably attached to a second inter-locking device associated with a return couple. An attachment member connected to the return couple via an attachment connector aperture associated with at least a portion of the return couple. 
     Other examples provide a method for performing maintenance using an electrical safety plug. A first interlocking device disengages from a second interlocking device to separate an anchor couple from a return couple. A set of pins associated with a first end of a nonconductive plug body inserts into a set of pin connector slots associated with an electric plug. The nonconductive plug body is attached to the anchor couple via a tether. At least one end of the tether is connected to a second end of the plug body. The anchor couple attaches to at least a portion of a member of a case via the first interlocking device creating tension in the tether. The tension pulls an electrical harness associated with the nonconductive plug body in a direction of an attachment point of the tether. The nonconductive plug body covers the set of pin connection slots and the tether pulls the electrical harness away from a base member. 
     Still other examples provide an electrical safety plug capable of being secured during performance of a task. An electrical outlet includes one or more pin connector slots. An electrical safety plug includes a nonconductive plug body having one or more pins conforming to the one or more pin connector slots. The one or more pins associated with a first end of the nonconductive plug body. A tether connects to a second end of the nonconductive plug body at one or more attachment points. A tether connection aperture associated with an anchor couple. The tether is at least partially threaded through the tether connection aperture. The anchor couple includes an interlock device anchoring the anchor couple to at least a portion of a member of a display case. 
     This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is an exemplary block diagram illustrating an electrical safety plug. 
         FIG.  2    is an exemplary block diagram illustrating an electrical safety plug engaging an electrical harness. 
         FIG.  3    is an exemplary block diagram illustrating an electrical safety plug including a pair of interlocking devices connecting a pair of couplers. 
         FIG.  4    is an exemplary block diagram illustrating an electrical safety plug including an anchor couple and a return couple. 
         FIG.  5    is an exemplary block diagram illustrating a pair of couplers. 
         FIG.  6    is an exemplary block diagram illustrating a nonconductive plug body including a set of two pins. 
         FIG.  7    is an exemplary block diagram illustrating a nonconductive plug body including a set of three pins. 
         FIG.  8    is an exemplary block diagram illustrating an electrical safety plug having a tether and a set of three pins. 
         FIG.  9    is an exemplary block diagram illustrating an electrical safety plug having a tether and a set of two pins. 
         FIG.  10    is an exemplary block diagram illustrating an electrical safety plug including an anchor couple having a magnetic interlock device. 
         FIG.  11    is an exemplary block diagram illustrating an electrical safety plug including an anchor couple having a suction device for attaching to a sidewall. 
         FIG.  12    is an exemplary block diagram illustrating a side view of an electrical safety plug having a single pin. 
         FIG.  13    is an exemplary block diagram illustrating an electrical safety plug having the anchor couple attached to the return couple. 
         FIG.  14    is an exemplary block diagram illustrating an electrical safety plug having the anchor couple detached from the return couple. 
         FIG.  15    is an exemplary block diagram illustrating a front view of an electrical safety plug having a set of three pins. 
         FIG.  16    is an exemplary block diagram illustrating a side view of an electrical safety plug having a set of two pins. 
         FIG.  17    is an exemplary block diagram illustrating a top view of a couple device. 
         FIG.  18    is an exemplary block diagram illustrating a bottom view of a couple device having a set of two magnets. 
         FIG.  19    is an exemplary block diagram illustrating a bottom view of a couple device having a set of three magnets. 
         FIG.  20    is an exemplary block diagram illustrating a safety plug having a set of pins configured to engage a set of slots on an electric plug. 
         FIG.  21    is an exemplary block diagram illustrating an electrical wiring harness engaged with an electrical safety plug anchored to a side wall via a magnet. 
         FIG.  22    is an exemplary flow chart illustrating operation of the computing device to engage an electrical safety plug with an electric plug. 
     
    
    
     Corresponding reference characters indicate corresponding parts throughout the drawings. 
     DETAILED DESCRIPTION 
     A more detailed understanding can be obtained from the following description, presented by way of example, in conjunction with the accompanying drawings. The entities, connections, arrangements, and the like that are depicted in, and in connection with the various figures, are presented by way of example and not by way of limitation. As such, any and all statements or other indications as to what a particular figure depicts, what a particular element or entity in a particular figure is or has, and any and all similar statements, that can in isolation and out of context be read as absolute and therefore limiting, can only properly be read as being constructively preceded by a clause such as “In at least some examples, . . . ” For brevity and clarity of presentation, this implied leading clause is not repeated ad nauseum. 
     Referring to the figures, examples of the disclosure enable an electrical safety plug for engaging an electrical outlet during a cleaning operation or other service to protect a user performing the cleaning or service task from electrical shock, injury, or discomfort. In some examples, a set of couplers connect a dummy plug on a tether to an attachment member via a set of interlocking devices. This enables the anchor couple to grip or attach to a side wall while engaged with an electrical wiring harness associated with the electrical outlet. The anchor couple and tether lift or elevate the wiring harness above a bottom surface or other base member during the performance of the cleaning or other maintenance task. This simplifies the task, keeping the electric outlet away from water being sprayed during cleaning and protecting the user from electrical discharge from the outlet. It further holds the wiring in position along the side wall or along the base (bottom) member so the user can clean the case without the outlet or wiring getting in the way. 
     Other aspects of the disclosure further enable a dummy electrical safety plug that attaches to the electrical harness when the fan or other equipment is unplugged or otherwise disconnected. In some examples, when the safety plug is not in use, a return coupler attaches the safety plug to a cleaning cart, maintenance tool or other device via a magnet or set of magnets tethered to the plug. This enables more efficient management of the safety plug while increasing user safety during maintenance. 
     In other examples, the electrical safety plug covers the end of a refrigeration case electrical supply harness to prevent user contact with the live outlet and prevent water entering the outlet during maintenance operations. Maintenance operations can include disassembly, cleaning, replacing parts, performing diagnostic testing, or other maintenance tasks. Cleaning can include washing with water, cleaning with solvents, wiping down, drying, or other tasks to improve cleanliness of the case, equipment/parts inside the case, or areas within the case. This ensures the safety of those working on or near the harness during service or cleaning operations for reduced injuries and greater case cleaning efficiency. 
       FIG.  1    is an exemplary block diagram illustrating an electrical safety plug  100 . The electrical safety plug  100  includes a nonconductive plug body  102  having a set of one or more pins  104 . The nonconductive plug body  102  is a dummy plug which does not conduct electricity. The set of pins  104  includes one or more pins configured to fit within each slot in the set of slots of a female end of an electrical outlet. The set of pins can include a single pin, a pair of two pins, a set of three pins or any other number of pins. In some examples, the set of pins  104  are interchangeable, such that a user can remove an adapter  103  portion of the nonconductive plug body  102  and replace it with a different adapter portion having a different number of pins conforming to a different number of slots in the female end of a different outlet. In other words, the user can interchange or replace the set of pins by replacing an adapter member on the nonconductive plug body  102 . 
     A tether  106  is connected to one end of the nonconductive plug body at an attachment point  107 . The attachment point  107  is the portion of the plug body at which at least one end of the tether is connected to the plug body. One end or both ends of the tether can be connected to the plug body at the attachment point  107  by bonding, gluing, or otherwise adhering the tether to the plug body. In other examples, the end of the tether is integrated into the plug body, wherein at least a portion of the end of the tether is at least partially embedded within the plug body. 
     The set of pins  104  are connected to the other (opposing) end of the nonconductive plug body opposite to the attachment point  107  at which the tether  106  attaches to the nonconductive plug body. The tether  106  can be implemented as a string, nylon, rope, wire encased within a nonconductive outer coating, or any other type of tether. 
     The tether  106  is connected to an anchor couple  108  via a tether connection aperture  110 . The tether connection aperture  110  is an opening defined by the body of the anchor couple  108 . The tether  106  loops through the aperture to connect the anchor couple  108  to the nonconductive plug body  102 . 
     The tether  106 , in some examples, is a lanyard having a length within a range from six inches to eighteen inches. In other examples, the length of the tether is a user-configurable length depending on the configuration or depth of the case being cleaned. In an example, the user can add additional length of tether to the pre-existing tether  106  to extend or increase the length of the tether connecting the anchor couple to the plug body. The plug body having the set of pins may also be referred to as a dummy plug. 
     In still other examples, the tether is extendable and/or retractable such that the length of the tether is variable during usage depending on whether the tether is fully extended, partially extended, fully retracted and/or partially retracted within a housing associated with the safety plug. In an example, the tether is a retractable lanyard on an extendible rolling lanyard. At least one end of the tether connects to the plug body at the attachment point  107  and at least a portion of the tether connects to the anchor couple. The tether can connect to the anchor couple by threading through an aperture on the anchor couple. When pulled taut, such as when attached to a side wall, base member or other object, tension is created along the length of the tether to move, pull, lift or otherwise assist in holding the electrical harness out of the workspace where the user is cleaning or performing other maintenance or repair tasks. 
     The anchor couple  108  connects to a corresponding return couple  116  via an interlocking device  112  on the anchor couple  108  which removably connects to an interlocking device  114  on the return couple  116 . In some examples, the anchor couple  108  and/or the return couple is implemented as a main body composed of polymer, wood, rubber, vinyl, polyvinyl chloride (PVC), or any other nonconductive material. 
     The interlocking device  112  is a device for removably connecting to the interlocking device  114 . In some examples, the interlocking device  112  and the interlocking device  114  are magnets having opposing poles that attract to each other. In other examples, the interlocking device  112  and the interlocking device  114  are threaded devices which connect when the interlocking device  112  is aligned with the interlocking device  114  and rotated either clockwise or counterclockwise to thread the interlocking devices together. In still other examples, the interlocking device  112  and the interlocking device  114  include hook-and-loop fasteners which removably attach to each other. The interlocking device  112  and the interlocking device  114  in still other examples snap together, click together, latch or otherwise removably connect. 
     An attachment member  120  may be threaded through an attachment connector aperture  118 , in other examples. The attachment connector aperture  118  is a hole defined by the return couple  116  body. The attachment member  120  is a device for connecting the electrical safety plug  100  to a cleaning cart, a maintenance tool, supply belt, ladder, fixture, structure or device. In this non-limiting example, the attachment member attaches to a cleaning cart or caddy. The attachment member connects to a cart, tool, ladder, belt, caddy, structure, fixture, or device by hanging on a hook, being clipped onto a ring, snapping on, or otherwise removably attaching to a portion or member of the object to which the attachment member is attaching to secure the electrical safety plug to the object. 
     In some examples, the attachment member  120  is some examples is a tether, such as the tether  106 . The tether attachment member, in these examples, can be implemented as a nonconductive material, such as string, nylon, rope, cord, insulated wire, or any other flexible type of connector. The attachment member  120 , in other examples, is implemented as a non-flexible ring or hook. The attachment member  120 , in these examples, may be composed of metal, plastic, composite material or any other suitable substance. In still other examples, the attachment member  120  is implemented as a suction device, a clip, a ring, loop, hook, or any other type of device for attaching the electrical safety plug to a cleaning cart or other device. The suction device is a device for attachment by creating a suction, such as, but not limited to, one or more suction cups. 
     The color of the nonconductive plug body  102 , in some examples, is an orange color or other bright color which is easily noticed (stands out) to alert the user that it is a dummy plug. Other colors could include red, blue, yellow or other bright colors. However, the examples are not limited to the colors listed herein. The plug body may be any color desired by the user in other examples. 
     In some examples, the electrical safety plug includes a light, such as, but not limited to, a light emitting diode (LED) light or a set of one or more LED lights. The light includes an off and on switch. The user activates the on switch to activate the light. The light can assist the user while working in a partially enclosed or poorly lit area. The one or more LED lights may be attached to one or more elements of the electrical safety plug. For example, LED lights  122  implemented on nonconductive plug body  102 , LED lights  124  implemented on attachment member  120 , LED lights  126  implemented on return couple  116  and/or LED lights  128  implemented on anchor couple  108 .  FIG.  1    is provided for illustrative purposes and should not be construed as limiting in any way. Although LED lights are illustrative provided on more than one element in  FIG.  1   , LED lights may be implemented on fewer elements or no elements in some embodiments. In still other examples, the one or more LED lights are removably attached to one or more elements of the electrical safety plug. 
     In other examples, the electrical safety plug includes one or more diagnostic sensors, such as diagnostic sensor  130  implemented on nonconductive plug body  102 . A diagnostic sensor includes, for example, but without limitation, a voltmeter, an ammeter, an ohm meter, or other sensors for detecting whether the outlet is a live outlet having a live power source connected to it or a dead outlet, an amount of voltage running through the electrical harness, etc. 
     In an example scenario, when the set of pins of the safety plug is inserted into the set of pin connector slots of an electrical outlet, an indicator  132  communicatively coupled to diagnostic sensor  130  on the electrical safety plug indicates whether the outlet is live (current present) or dead (no current). An outlet may be dead if there is no power source feeding electric current to the outlet. If the outlet is live, the safety plug may remain engaged with the outlet and the anchor couple is attached to the side wall or base member of the case to be cleaned. The tension on the tether connecting the anchor couple to the dummy plug pulls or partially lifts the electrical harness and safety plug away from an area where the user is working (performing maintenance). Maintenance may include cleaning, repairing, etc. The area where the user is working may be at or near the original location of the outlet. In other examples, the user secures the anchor couple to the base member to prevent the electrical harness from shifting, sliding or otherwise moving (becoming displaced) during cleaning. 
       FIG.  2    is an exemplary block diagram illustrating an electrical safety plug  200  engaging an electrical harness  202 . The electrical safety plug  200  is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1   . 
     The electrical harness  202 , in some examples, includes a set of one or more wires  204  transmitting power, such as electrical power, from a power source  210  to the electric outlet  208 . The electric outlet  208  includes a set of pin connector slots  206  having one or more pin connector slots for engaging one or more pins in the set of pins  214  on the electrical safety plug  200 . 
     In some examples, if the set of pin connector slots  206  includes two slots, the electrical safety plug  200  used to connect to the electric outlet  208  also includes two pins. Likewise, if the set of pin connector slots  206  includes three slots on the female end of the outlet, the electric safety plug  200  includes three pins configured and arranged (spaced and sized) to fit within the cavity defined inside each pin connector slot. 
       FIG.  3    is an exemplary block diagram illustrating an electrical safety plug  300  including a pair of interlocking devices  302  connecting a pair of couplers  304 . The electrical safety plug  300  is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1    and/or the electrical safety plug  200  in  FIG.  2   . 
     The electrical safety plug  300 , in this example, is in a closed configuration in which the return couple  116  and the anchor couple  108  are attached via the pair of interlocking devices  302 . In an open configuration, the dummy plug portion of the device attached to the lanyard is disconnected from the return couple. In other words, in an open configuration, the anchor couple is not connected or touching the return couple. The pair of interlocking devices are not in physical contact. In the closed configuration, the anchor couple  108  and the return couple  116  are joined via the pair of interlocking devices  302 . 
     The pair of interlocking devices  302  is a set of two corresponding devices configured to removably connect the anchor couple  108  to the return couple  116 . In some examples, the pair of interlocking devices  302  is a set of magnets having opposite poles such that the magnets attract or bind to each other when in proximity to each other. In other examples, the pair of interlocking devices  302  can include a threaded screw which screws into a threaded housing (threaded ends), a set of hook-and-loop fasteners, a pair of snaps, a set of one or more suction cups, or any other device for removably attaching the return couple  116  to the anchor couple  108 . 
     The return couple  116 , in some examples, includes an attachment member  120 . The attachment member  120 , in this non-limiting example, is a ring or tether for connecting the electrical safety plug  300  to a device. The attachment member  120  is permanently connected to the object. In other examples, the attachment member  120  is removably connected to the object. 
     The anchor couple  108 , in this non-limiting example, is non-removably connected to the nonconductive plug body  102  via the tether  106 . The nonconductive plug body  102  includes the set of pins  104  at a first end of the nonconductive plug body  102 . In this example, the set of pins  104  includes a pin  308  and a pin  310 . 
     In some examples, the electrical safety plug includes a first attachment point  107  and a second attachment point  307  at the second end of the nonconductive plug body  102  which is opposite to the first end of the nonconductive plug body. The first end of the tether connects to the plug body at the first attachment point  107 . The second end of the tether connects to the plug body at the second attachment point  307 . 
       FIG.  4    is an exemplary block diagram illustrating an electrical safety plug  400  including an anchor couple  108  and a return couple  116 . The electrical safety plug  400  is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1    and/or the electrical safety plug  200  in  FIG.  2   . The pair of couplers  304  in this example are engaged together such that the pair of couplers  304  are removably connected together. 
       FIG.  5    is an exemplary block diagram illustrating a pair of couplers  500 . The pair of couplers  500  is a set of two couplers, such as, but not limited to, the pair of couplers  304  in  FIG.  3   . 
     The pair of couplers  304 , in some examples, includes the return couple  116  and the anchor couple  108 . In this example, the anchor couple  108  and the return couple  116  are shown detached from each other. In other words, the interlocking devices are not engaged to connect the return couple to the anchor couple in this example. 
     In some examples, the set of interlocking devices includes a magnet  502  on an interior surface  504  of the return couple  116  and a magnet  506  associated with the interior surface  508  of the anchor couple  108 . The magnets may be partially embedded within an interior portion of a couple, attached to the outer surface of the couple or otherwise attached to the couple. 
     A tether connection aperture  110  in the anchor couple  108  forms an aperture. A tether loops through the aperture to connect the anchor couple  108  to the nonconductive plug body. An attachment connector aperture  118  in the return couple  116  defines an aperture through which an attachment member may be threaded. 
       FIG.  6    is an exemplary block diagram illustrating a nonconductive plug body  600  including a set of two pins. The nonconductive plug body  600  is a plug body composed of a nonconductive substance, such as, but not limited to, the nonconductive plug body  102  in  FIG.  1   . 
     In this non-limiting example, the set of pins includes two pins. The tether  106  is a loop of string, nylon, cord, rope, insulated wire or another type of material. The tether  106  connects to one end of the nonconductive plug body  600 . The set of pins is connected to the opposing end of the nonconductive plug. In this example, the tether  106  includes a loop in which two ends of the tether connect to the end of the plug. 
       FIG.  7    is an exemplary block diagram illustrating a nonconductive plug body  700  including a set of three pins. The nonconductive plug body  700  is a plug body composed of a nonconductive substance, such as, but not limited to, the nonconductive plug body  102  in  FIG.  1    and/or the nonconductive plug body  700  in  FIG.  7   . 
     The set of pins in this example includes three pins. The set of three pins are connected to one end of the nonconductive plug body  700 . 
     The tether  702  is an attachment member, such as, but not limited to, the tether  106  in  FIG.  1   . The tether  702  is connected to the opposing end of the nonconductive plug. In this example, the tether  702  is a single strand or single end of the tether that connects to at least a portion of the nonconductive plug body  700 . 
       FIG.  8    is an exemplary block diagram illustrating an electrical safety plug  800  having a looped tether and a set of three pins. The electrical safety plug is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1    and/or the electrical safety plug  200  in  FIG.  2   . In this non-limiting example, both ends of the tether connect to a base or end of the nonconductive plug body of the electrical safety plug  800 . The set of pins, in this example, includes three pins. 
     Referring to  FIG.  9   , an exemplary block diagram is shown illustrating an electrical safety plug  900  having a looped tether  902 . The set of pins, in this example, includes two pins. 
       FIG.  10    is an exemplary block diagram illustrating an electrical safety plug  1000  including an anchor couple  108  having a magnetic interlock device  1002 . The electrical safety plug  1000  is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1    and/or the electrical safety plug  200  in  FIG.  2   . 
     The magnetic interlock device  1002  is a device in a set of interlocking devices for removably connecting the anchor couple  108  to the return couple  116  on the electrical safety plug  1000 . The magnetic interlock device  1002 , in this example, includes one or more magnets configured to attract to one or more other magnets associated with the return couple  116  or a metal material associated with a member of a display case being cleaned or serviced, such as a side wall of a device, base plate (bottom member) or other metal structure. In some examples, the side wall is a side wall of a display case or other device. 
     In some examples, a tether  106  connects the anchor couple  108  to the nonconductive plug body. The nonconductive plug body  102  includes a set of pins. In this example, the set of pins includes two pins. However, in other examples, the set of pins can include a single pin, three pins, or any other number of pins. 
       FIG.  11    is an exemplary block diagram illustrating an electrical safety plug  1100  including an anchor couple  108  having a suction device  1104  for attaching to a sidewall. The electrical safety plug  1100  is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1    and/or the electrical safety plug  200  in  FIG.  2   . 
     In this example, the safety plug  1100  includes a magnet  1102  for connecting to the return couple and/or the metal side wall or other metal structure. In other examples, the electrical safety plug  1000  includes a suction device  1004  for removably attaching the anchor couple to a plastic side wall or other non-metal structure, such as, but not limited to, one or more rubber suction cups. In still other examples, the anchor couple includes both a set of magnets and a set of suction devices for adhering to both metal and non-metal surfaces. 
     In other examples, the tether  106  connects the anchor couple  108  to the nonconductive plug body  102 . The electrical safety plug  1100  includes a set of pins  104 . The set of pins, in this example, includes two pins. However, the examples are not limited to two pins. In other examples, the set of pins  104  can include a single pin as well as three or more pins. 
       FIG.  12    is an exemplary block diagram illustrating a side view of an electrical safety plug  1200  having a single pin. The electrical safety plug  1200  is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1    and/or the electrical safety plug  200  in  FIG.  2   . 
       FIG.  13    is an exemplary block diagram illustrating an electrical safety plug  1300  having the anchor couple attached to the return couple. The electrical safety plug  1200  is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1    and/or the electrical safety plug  200  in  FIG.  2   . 
       FIG.  14    is an exemplary block diagram illustrating an electrical safety plug  1400  having the anchor couple detached from the return couple. The electrical safety plug  1400  is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1    and/or the electrical safety plug  200  in  FIG.  2   . 
       FIG.  15    is an exemplary block diagram illustrating a front view of an electrical safety plug  1500  having a set of three pins. The electrical safety plug  1500  is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1    and/or the electrical safety plug  200  in  FIG.  2   . 
       FIG.  16    is an exemplary block diagram illustrating a side view of an electrical safety plug  1600  having a set of two pins. The electrical safety plug  1600  is a safety plug, such as, but not limited to, the electrical safety plug  100  in  FIG.  1    and/or the electrical safety plug  200  in  FIG.  2   . 
       FIG.  17    is an exemplary block diagram illustrating a top view of a couple device  1700 . The couple device  1700  is a couple in a pair of couples, such as, but not limited to, the anchor couple  108  in  FIG.  1    and/or the return couple  116  in  FIG.  1   . 
       FIG.  18    is an exemplary block diagram illustrating a bottom view of a couple device  1800  having a set of two magnets. Each magnet in the set of magnets is a magnetic interlock device for removably attaching the couple device to another couple device in the pair of couples, such as, but not limited to, the magnetic interlock device  1002  in  FIG.  10   . A magnet in the set of magnets may include any type of magnetic device, such as, but not limited to, the magnet  502  in  FIG.  5   , the magnet  506  in  FIG.  5    and/or the magnet  1102  in  FIG.  11   . 
       FIG.  19    is an exemplary block diagram illustrating a bottom view of a couple device  1900  having a set of three magnets. Each magnet in the set of three magnets is a magnetic interlock device for removably attaching the couple device to another couple device in the pair of couples, such as, but not limited to, the magnetic interlock device  1002  in  FIG.  10   . A magnet in the set of magnets may include any type of magnetic device, such as, but not limited to, the magnet  502  in  FIG.  5   , the magnet  506  in  FIG.  5    and/or the magnet  1102  in  FIG.  11   .  FIG.  20    is an exemplary block diagram illustrating a safety plug having a set of pins configured to engage a set of slots on an electric 
       FIG.  20    is an exemplary block diagram illustrating an electrical safety plug  2000  having a set of pins configured to engage a set of slots  2002  on an electric outlet  208 . Each slot in the set of slots defines a cavity  2004 . A pin in the set of pins  104  is configured to conform to the cavity  2004  defined by a slot in the set of slots. 
     In some non-limiting examples, the magnetic interlock device  1002  of the anchor couple  108  removably attaches to a side wall or base member. The tension on the tether  106  pulls the electrical harness  202 , including the set of wires  2006  and electric outlet  208 , out of the user&#39;s work area. 
       FIG.  21    is an exemplary block diagram illustrating an electrical wiring harness engaged with an electrical safety plug  200  anchored to a side member  2104  via a magnet. The side member may also be referred to as a side wall. The tension on the tether  106  lifts or pulls the electric outlet  208  (electrical harness) away from the area where the user is spraying water or cleaning fluid to clean the base member  2102  of the case  2100 . The case  2100  can include a refrigerated display case, a freezer case, or any other type of case for storing temperature-controlled items, such as perishable items. 
       FIG.  22    is an exemplary flow chart illustrating operation of the computing device to engage an electrical safety plug with an electric plug. The process begins when a first interlocking device associated with an anchor couple is disengaged from a second interlocking device associated with a return couple at  2202 . In some examples, the interlocking devices are magnets and the interlocking devices are disengaged by manually pulling the magnets apart. The safety plug is attached into an electrical outlet associated with an electrical harness at  2204 . The anchor couple device is attached to a side member  2206 . The side member, in this example, is a side of a refrigerated display case or a freezer display case. In other examples, the side member can be a side of any type of container, housing, case, or other structure being cleaned or serviced. The anchor couple supports the safety plug and the electrical harness in an elevated or displaced configuration moving the electrical harness away from a work area where the cleaning or service task is being performed. When the cleaning or service task is completed at  2208 , the anchor couple is detached from the side member at  2210 . The safety plug is retracted or otherwise removed from the electrical outlet associated with the electrical harness at  2212 . After removing the safety plug from the electrical outlet, the first interlocking device may be reattached to the second interlocking device to resecure the safety plug to the attachment member. The process terminates thereafter. 
     Additional Examples 
     In some examples, the electrical safety plug includes a light, such as, but not limited to, a light emitting diode (LED) light or a set of one or more LED lights. The light includes an off and on switch. The user activates the on switch to activate the light. The light can assist the user while working in a partially enclosed or poorly lit area. The one or more LED lights may be attached to the attachment member and/or the return couple of the electrical safety plug. In other examples, the one or more LED lights are attached to the nonconductive plug body and/or the anchor couple. In still other examples, the one or more LED lights are removably attached to the electrical safety plug. 
     In other examples, the electrical safety plug includes one or more diagnostic sensors. A diagnostic sensor included on the safety plug can include, for example, but without limitation, a voltmeter, an ammeter, an ohm meter, or other sensors for detecting whether the outlet is a live outlet having a live power source connected to it or a dead outlet, an amount of voltage running through the electrical harness, etc. 
     In an example scenario, when a user inserts the set of pins of the safety plug into the set of pin connector slots on an outlet, an indicator on the electrical safety plug indicates whether the outlet is live (current present) or dead (no current). An outlet may be dead if there is no power source feeding electric current to the outlet. If the outlet is live, the user leaves the safety plug engaged with the outlet and attaches the anchor coupler to the side wall or base member of the case to be cleaned. The tension on the tether connecting the anchor to the dummy plug pulls or partially lifts the electrical harness and safety plug away from an area where the user is working (performing maintenance). Maintenance may include cleaning, repairing, etc. The area where the user is working may be at or near the original location of the outlet. In other examples, the user secures the anchor to the base member to prevent the electrical harness from shifting, sliding or otherwise moving (becoming displaced) during cleaning. 
     While the aspects of the disclosure have been described in terms of various examples with their associated operations, a person skilled in the art would appreciate that a combination of operations from any number of different examples is also within scope of the aspects of the disclosure. 
     The order of execution or performance of the operations in examples of the disclosure illustrated and described herein is not essential, unless otherwise specified. That is, the operations can be performed in any order, unless otherwise specified, and examples of the disclosure can include additional or fewer operations than those disclosed herein. For example, it is contemplated that executing or performing an operation before, contemporaneously with, or after another operation is within the scope of aspects of the disclosure. 
     When introducing elements of aspects of the disclosure or the examples thereof, the articles “a,” “an,” “the,” and “said” are intended to mean that there are one or more of the elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there can be additional elements other than the listed elements. The term “exemplary” is intended to mean “an example of.” The phrase “one or more of the following: A, B, and C” means “at least one of A and/or at least one of B and/or at least one of C.” 
     Having described aspects of the disclosure in detail, it will be apparent that modifications and variations are possible without departing from the scope of aspects of the disclosure as defined in the appended claims. As various changes could be made in the above constructions, products, and methods without departing from the scope of aspects of the disclosure, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.