6. Lightning Protection Zones (LPZ) · Page 4 of 6
Applying LPZ to Industrial Plants
Long cable runs and MCCs need deliberate zone thinking.
Outdoor to indoor transitions
Cables from tank farms, conveyor field devices, and rooftop equipment should be SPD-protected at entry panels.
Control rooms
Treat the control room as a cleaner zone: bond cable armors, protect power and signal entries, and avoid mixing dirty and clean earths carelessly.
Process uptime
Zone design is an uptime tool, not only a standards exercise.