Briefing 07 // SUBSYSTEM: Electrical Hardening // 26 PAGES A4 PDF
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Commercial Surge Protection (BS 7671 SPD), Grid Transients & Cold-Spare Vaults
Protecting switchgear, inverters, NVR servers, and cold-backup drives from grid re-energisation spikes and geomagnetic surges.
Mandatory Plant-Room Commissioning Checklist
- Install Type 1+2 Surge Protection Devices (SPDs) at main commercial distribution boards and sub-boards
- Fit DC surge arrestors on rooftop solar strings and coaxial lightning arrestors on external RF/4G antennas
- Maintain an unplugged cold-spare recovery kit (encrypted NVMe backup, spare router, handheld radios) in a shielded enclosure
- Inspect earth-rod resistance and equipotential bonding annually
Full Standard Operating Procedure (SOP) Protocol
# RESILIENCE LAB TECHNICAL SOP 07
## Commercial Surge Protection (BS 7671 SPD) & Cold-Spare Vaults