# US 8,785,776 B2 · Methods and systems for coupling busway components > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,785,776 B2 - Document ID: US8785776B2 - Status: Granted - Kind: B2 - Application number: 12/960,874 - Filed: 2010-12-06 - Published: 2012-06-07 - Granted: 2014-07-22 - Earliest claimed: 2010-12-06 - Assignees: General Electric Company - Applicants: Steven English Richard; Mariusz Duda - Inventors: Steven English Richard; Mariusz Duda - Web page: https://patentgrep.com/patent/US8785776B2 ## CPC - H02G 5/007: {Butt joining of bus-bars by means of a common bolt, e.g. splice joint (electrically conductive connections characterised by contacting members H01R4/58)} - H02B 1/16: Earthing arrangements (earthing arrangements for substations H02B5/01; earthing arrangements for switchgear H02B11/28, H02B13/075) - Y10T 29/49117: Conductor or circuit manufacturing - H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES - H02B: BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An electrical power distribution system is described. The system includes a ground busbar including a first opening defined therein and a busway housing including a second opening defined therein. The system also includes a fastener sealing system that includes a fastener and at least one seal. The fastener is configured to extend through the first opening and the second opening and to couple the ground busbar to the busway housing. The ground busbar contacts the busway housing, forming a ground connection therebetween. ## Claims ### Claim 1 An electrical power distribution system comprising: a ground busbar including a first opening defined therein; at least one first busbar; a busway housing including a second opening defined therein, said at least one first busbar positioned at least partially within an interior defined by said busway housing; and a fastener sealing system comprising a fastener, a spacing device, and at least one seal, said fastener comprising a restraining portion and a fastener body configured to extend through said first opening and said second opening, said spacing device positioned between said restraining portion and said at least one seal, said fastener configured to couple said ground busbar to said busway housing, said ground busbar contacting said busway housing and forming a ground connection therebetween, said spacing device comprising a compression spacer configured to compress said at least one seal and maintain the ground connection between said ground busbar and said busway housing, and said spacing device and said at least one seal positioned exterior to said busway housing. ### Claim 2 (depends on 1) A system in accordance with claim 1 wherein said at least one seal is configured to reduce contaminant ingress through at least one of said first opening and said second opening. ### Claim 3 (depends on 1) A system in accordance with claim 1 wherein said fastener is configured to apply a compression force on said spacing device. ### Claim 4 (depends on 3) A system in accordance with claim 3 wherein said fastener comprises a threaded fastener and a cooperating member configured to convert torque applied to said fastener to the compression force on said spacing device. ### Claim 5 (depends on 3) A system in accordance with claim 3 wherein said spacing device further comprises a spring washer. ### Claim 6 (depends on 5) A system in accordance with claim 5 wherein said spacing device maintains a substantially fixed compression force on said at least one seal. ### Claim 7 (depends on 5) A system in accordance with claim 5 wherein said spacing device comprises a first notch and a second notch, said first notch configured to receive at least a portion of said spring washer and said second notch configured to receive at least a portion of said ground busbar. ### Claim 8 A tiebolt sealing system for coupling a ground busbar and a busway housing, the ground busbar and the busway housing each comprising an opening defined therein, said system comprising: a fastener comprising a body and a restraining portion, said fastener body configured to extend through the openings defined within the ground busbar and the busway housing; at least one first busbar positioned at least partially within an interior defined by the busway housing; at least one seal configured to extend at least partially around said fastener body and to be positioned at least partially within the opening defined within the ground busbar, said at least one seal configured to seal the opening defined within the busway housing; and at least one spacing device positioned between said restraining portion and said at least one seal, said spacing device comprising a compression spacer configured to compress said at least one seal and maintain contact between the ground busbar and the busway housing, and said spacing device and said at least one seal positioned exterior to the busway housing. ### Claim 9 (depends on 8) A system in accordance with claim 8 wherein said at least one spacing device is positioned between said restraining portion and the ground busbar. ### Claim 10 (depends on 9) A system in accordance with claim 9 wherein said at least one spacing device further comprises a spring washer. ### Claim 11 (depends on 10) A system in accordance with claim 10 wherein the contact between the busway housing and the ground busbar provides a ground path between the busway housing and the ground busbar. ### Claim 12 (depends on 9) A system in accordance with claim 9 wherein said fastener comprises a threaded fastener and a cooperating member configured to convert torque applied to said fastener to a compression force on said at least one spacing device. ### Claim 13 (depends on 12) A system in accordance with claim 12 wherein said at least one spacing device is configured to maintain a substantially fixed compression force on said at least one seal. ### Claim 14 A method for coupling a ground busbar to a busway housing, the ground busbar including a first opening defined therein by a first edge and the busway housing including a second opening defined therein by a second edge, said method comprising: configuring the ground busbar and the busway housing such that the first opening and the second opening align to define a single fastener opening and the ground busbar contacts the busway housing, providing an electrical ground connection therebetween; configuring at least one first busbar and the busway housing such that the at least one first busbar is positioned at least partially within an interior defined by the busway housing; configuring a fastener sealing system to maintain contact between the ground busbar and the busway housing, the fastener sealing system including at least one seal and a fastener including a restraining portion, the fastener configured to extend through the fastener opening and the at least one seal configured to prevent contaminants from passing through the fastener opening; and configuring at least one spacing device for positioning between the restraining portion and the at least one seal, the spacing device including a compression spacer configured to compress the at least one seal and maintain contact between the ground busbar and the busway housing, and the spacing device and the at least one seal positioned exterior to the busway housing. ### Claim 15 (depends on 14) A method in accordance with claim 14 further comprising configuring the ground busbar to receive the at least one seal at least partially within the first opening, and to position the at least one seal radially inward from the first edge. ### Claim 16 (depends on 15) A method in accordance with claim 15 further comprising configuring the at least one seal for positioning between the first edge and the fastener. ### Claim 17 (depends on 14) A method in accordance with claim 14 further comprising configuring the at least one spacing device to maintain a substantially fixed compression force on the at least one seal.