Electrical · E-Z6MAH

Grounding System Interconnections

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The grounding system configuration interconnects the Main Ground Bus in room 1511 with multiple Telecommunications Ground Bars and Ground Bars located across various rooms. Conductors include number 4/0 AWG bare copper and insulated green ground cables routed to the main switchboard, building steel, elevator, ground ring, and underground water pipe. Additional bonding utilizes number 4 AWG conductors connected to each metal piping system per NFPA 70 250.104 (B), encompassing supply air return, chilled water, compressed air, and condensate lines. Mounting heights for telecommunications ground bars are coordinated with the T series drawings.

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