Patent Publication Number: US-2023144867-A1

Title: Improved cabling device for electrical distribution devices

Description:
RELATED CASE 
     The present application claims priority to U.S. Provisional Pat. Application Serial No. 63/055,927, entitled MODULAR SWITCHBOARD, which was filed on Jul. 24, 2020 and is incorporated herein in its entirety. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to large electrical distribution devices having a main breaker/fused switch, and more particularly, to providing sufficient space for cabling and wiring the electrical distribution devices after they have been placed in their final location. 
     BACKGROUND 
     Typically, when an electrical distribution device is delivered to a job site it is completely assembled and ready to be electrically connected to the utility power source and down-stream electrical distribution devices. Most of the components that require electrical connections are located behind the factory installed electrical components of the electrical distribution device, making the required electrical connections very difficult to complete. 
     SUMMARY 
     One embodiment described herein provides an improved cabling device for an electrical distribution device. The improved cabling device includes a frame for supporting electrical components of the electrical distribution device. Additionally, the improved cabling device includes a rotatable section on which several of the electrical components of the electrical distribution device are attached, the rotatable section being rotatably attached to the frame for rotation between two positions, in a first position access to a cabling area is restricted and in a second position access to the cabling area provided. 
     In one embodiment described herein, the electrical components of the electrical distribution device are located in front of the cabling area when the rotatable section is in the first position. 
     In one embodiment described herein, the electrical components attached to the rotatable section include a main breaker/fused switch, a load bus section and a through bus section. 
     In one embodiment described herein, the main breaker/fused switch must be electrically disconnected from a line bus section and the through bus section must be electrically disconnected from any adjacent through bus sections prior to rotating the rotatable section from its first position to its second position. 
     In one embodiment described herein, the main breaker/fused switch, load bus section and through bus section remain electrically connected when the rotatable section is in either of the first or second positions. 
     In one embodiment described herein, the rotatable section is maintained in each of the first and second positions by a single pivotal latch. 
     In one embodiment described herein, the rotatable section is attached to a first fixed section by a hinge, the first fixed section defining a hole adjacent to the hinge for receiving one end of the pivotal latch as the rotatable section is being rotated from its first position to its second position. 
     In one embodiment described herein, the pivotal latch has a notch which receives an edge of the hole defined in the first fixed section when the rotatable section has rotated to its second position, the notch preventing the rotatable section from moving until the pivotal latch has been lifted to disengage the edge of the hole. 
     Another embodiment described herein provides an improved cabling access device for an electrical distribution device. The cabling access device includes a frame assembly for supporting components of the electrical distribution device including the improved cabling access device. Additionally, the cabling access device includes a line bus section configured to electrically connect to a utility power source and further configured to electrically connect to a power disconnect device such as a circuit breaker or fused switch. The cabling access device further includes a load bus section configured to be electrically connected to the power disconnect device and further configured to be electrically connected to a through bus section. The through bus section provides an electrical connection to a through bus of an adjacent electrical distribution device. The cabling access device also includes a rotatable subframe on which the power disconnect device, load bus and through bus sections are attached. The rotatable subframe is attached to the electrical distribution device frame assembly by a hinge such that when the power disconnect device is electrically disconnected from the line bus section and the through bus section is electrically disconnected from the through bus of an adjacent electrical distribution device the rotatable subframe can be rotated such that a cabling area of the electrical distribution device is exposed permitting improved access for pulling and connecting electrical cables. 
     In one embodiment described herein, the rotatable subframe includes a first fixed section and a second fixed section, each being temporally attached to the frame during assembly buy double headed rivets received in an L-shaped slots and permanently attached to the frame by screws. 
     In one embodiment described herein, the frame includes opposed side walls. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    illustrates a front view of the improved cabling device in its closed position, according to one embodiment described herein. 
         FIG.  2    illustrates an elevated corner view of the improved cabling device in its open position, according to one embodiment described herein. 
         FIG.  3    illustrates an installed improved cabling device with the line bus section and main breaker/fused switch removed, according to one embodiment described herein. 
         FIG.  4    illustrates an oblique view of the installed improved cabling device, according to one embodiment described herein. 
     
    
    
     A more detailed description of the disclosure, briefly summarized above, may be had by reference to various embodiments, some of which are illustrated in the appended drawings. While the appended drawings illustrate select embodiments of this disclosure, these drawings are not to be considered limiting of its scope, for the disclosure may admit to other equally effective embodiments. 
     Identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. However, elements disclosed in one embodiment may be beneficially utilized on other embodiments without specific recitation. 
     DETAILED DESCRIPTION 
     Referring now to  FIGS.  1 - 4   , an electrical distribution device  100  with an improved cabling device  104  installed is shown. The electrical distribution device  100  includes a frame  108  having uprights  112  and opposed side walls  116 , a line bus section  120 , a main breaker/fused switch  124 , a load bus section  128  and a through bus section  132 . When these particular sections are assembled they form a switchboard main section  136 . 
     As shown in the frontal view depicted in  FIG.  1   , access to a cabling area  140  ( FIG.  2   ) located behind the main breaker/fused switch  124 , load bus section  128  and through bus section  132  is restricted. In the cabling area  140   cables (not shown) from the utility supplying power to the switchboard main section  136  are pulled from raceways or conduit in the floor, walls or ceiling and connected to the cable lugs  144  ( FIG.  2   ) attached to line bus busbars  148 . The line bus section  120  is securely attached to the opposed side walls  116  by line bus brackets  152  and a line bus subframe  156 . The main breaker/fused switch  124 , load bus section  128  and through bus section  132  are attached to a rotatable section  160  of improved cabling device  104 . 
     The improved cabling device  104  includes a first fixed section  164  and a second fixed section  168 , which can be temporally attached to the opposed side walls  116  by L-shaped slots  172  which receive a double headed rivet  176  and securely attached to the side walls  116  by screws  196 . The first fixed section  164  is securely attached to one of the opposed side walls  116  along one side and attached by a hinge  180  to the rotatable section  160  along its other side. 
     In some applications the hinge  180 , or other known mechanisms for permitting rotation of an attached device, could also be attached to a structural member of the frame  108 , such as one of the uprights  112  or the side walls  116 . The second fixed section  168  is securely attached to the other of the opposed side walls  116 . 
     When cabling is required the main breaker/fused switch  124  is electrically disconnected from the line bus busbars  148  and the through bus section  132  is electrically disconnected from any adjacent through bus sections  132 . After the main breaker/fused switch  124  through bus section  132  have been disconnected a pivotal latch  184  ( FIG.  3   ) engaging the second fixed section  168  must be released to allow rotation of the rotatable section  160 . Additionally, as shown in  FIG.  3   , the improved cabling device  104  includes a structural support member  190 , positioned below the first fixed section  164 . Generally, the structural support member  190  provides load bearing support for the rotatable section  160  and, for example, can assist in preventing the rotatable section  160  from sagging during rotation. 
     When the rotatable section  160  starts rotating the other end of the pivotal latch  184  enters a hole  188  in the first fixed section  164 . When the rotatable section  160  has rotated about 90 degrees a notch  192  in the pivotal latch  184  engages an edge of the hole  188  in the first fixed section  164  to keep the rotatable section  160  from moving while cabling is being done. 
     In the preceding, reference is made to various embodiments. However, the scope of the present disclosure is not limited to the specific described embodiments. Instead, any combination of the described features and elements, whether related to different embodiments or not, is contemplated to implement and practice contemplated embodiments. Furthermore, although embodiments may achieve advantages over other possible solutions or over the prior art, whether or not a particular advantage is achieved by a given embodiment is not limiting of the scope of the present disclosure. Thus, the preceding aspects, features, embodiments and advantages are merely illustrative and are not considered elements or limitations of the appended claims except where explicitly recited in a claim(s). 
     It is to be understood that the above description is intended to be illustrative, and not restrictive. Many other implementation examples are apparent upon reading and understanding the above description. Although the disclosure describes specific examples, it is recognized that the systems and methods of the disclosure are not limited to the examples described herein but may be practiced with modifications within the scope of the appended claims. Accordingly, the specification and drawings are to be regarded in an illustrative sense rather than a restrictive sense. The scope of the disclosure should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.