A one-quarter-inch thick by two-inch wide by ten-inch long copper ground bar is mounted to the wall using mounting brackets and stand-off insulators. A grounding riser drops down from level B1 electrical room and connects to the busbar using a two-hole compression ground lug.
GROUNDING RISER DOWN TO LEVEL B1 ELECTRICAL ROOM BUSBAR 1/4"D x 2"W x 10"L COPPER GROUND BAR WITH WALL MOUNTING BRACKETS AND INSULATORS TWO HOLE COMPRESSION GROUND LUG (TYP)
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