6. Lightning Protection Zones (LPZ) · Page 3 of 6
Applying LPZ to Commercial Buildings
A simple zoning model for offices and mixed-use sites.

Entrance
MDB at LPZ 0/1 boundary with Type 1 or Type 1+2 SPD.
Floors / tenants
Floor SDBs as LPZ 1 internal distribution with Type 2 SPDs.
IT / security closets
Local Type 2/3 protection for access control panels, PoE switches, and DVR/NVR supplies.
