What changes for the facility
SN 3.02.19-2025 refines design standards for low-voltage systems. For the facility owner, the practical effect is stricter requirements for justifying design decisions and for the documentation handed over with the system.
Previously some decisions were made “based on the contractor's experience”. Now design decisions must be verifiable: coverage calculations, archive requirements, power scheme and maintenance procedure.
What to review first
- composition and currency of design documentation;
- justification of camera count and types;
- archive depth and retention requirements;
- power and communication redundancy;
- acceptance procedure and handover documents.
Design documentation
The design must answer three questions: what we protect, how we protect it, and how we prove it works. A good package includes an explanatory note, equipment layout plans, cable and power schemes, a specification with serial numbers, and a maintenance procedure.
Operation and audit
The new standards raise the bar for maintenance procedures. Facility teams need acts and evidence that checks were performed systematically: a maintenance log, fleet health report, photos of problem nodes and records in the monitoring system.
An audit should not stop facility operations. A realistic plan: remote availability and archive checks first, then a visit for critical findings, then scheduled work.
Checklist for facility teams
- Do the design and as-built documentation match the actual state?
- Are all system changes reflected in the documentation?
- Is archive depth compliant and verified?
- Is backup power tested and recorded in a protocol?
- Is the maintenance log kept without gaps?
- Is there an up-to-date camera fleet health report?
- Are emergency response times defined?
How to check a contractor
Request three things: test protocols (not just an act), the maintenance log, and a fleet health report. If the contractor cannot show a digital trail — photos, archive screenshots, monitoring records — there is no way to confirm the work was done.
A useful technique is spot checking: ask for footage from a specific camera at a specific time and compare it with the log.