Service entrance equipment connects to phase and neutral buses with overcurrent devices as scheduled, incorporating a removable neutral-to-ground link. A service and common main grounding conductor connects to a concrete-encased electrode and a copper clad grounding rod per National Electrical Code 250. The equipment ground is sized per code and bonds to the main interior cold water service and building structural steel. A 120/208V panel connects with a typical insulated neutral bar and a typical ground bar, with equipment enclosures bonded per National Electrical Code 250. Metal piping systems within the building are bonded, and ground bushings are provided on all conduits connected to panelboards and transformers.
G N LINK M SERVICE AND COMMON MAIN GROUNDING CONDUCTOR PER NEC 250 GROUND BUS TYPICAL GROUND BAR CONCRETE ENCASED ELECTRODE GROUND TO MAIN INTERIOR COLD WATER SERVICE PER NEC 250 SERVICE ENTRANCE EQUIPMENT (ONLY) NEUTRAL BUS PHASE BUS OVERCURRENT DEVICES AS SCHEDULED BOND TO BLDG. STEEL PER NEC 250 NOTE: CONTRACTOR TO BOND ALL METAL PIPING SYSTEMS WITHIN THE BUILDING. CONTRACTOR TO PROVIDE GROUND BUSHINGS ON ALL CONDUITS CONNECTED TO PANELBOARDS, TRANSFORMERS, ETC. COPPER CLAD GROUNDING ROD PER NEC 250 BOND PANELBOARD ENCLOSURE PER NEC 250 OR 25% OF SERVICE PHASE CONDUCTOR OVER 1100 KCMIL SERVICE EQUIP. GROUND SIZED PER NEC 250 120/208V PANEL (TYP.) SIZE PER NEC 250 TYPICAL INSULATED NEUTRAL BAR G N
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