What evidence do auditors commonly ask for on PS-06 Protection against interruptions caused by power failures and other such risks?

Single line electrical diagram showing the N+1 arrangement per hall; Load bank and black start test report for the generator set; Battery capacity measurement results for each UPS string; Cable distributor inspection record covering seals, earthing and patch documentation; Fuel supply contract together with on site fuel stock readings.

What is the most common gap auditors find on PS-06?

Generator started monthly off load so genuine capacity is never proven

BSI C5 (121-criteria catalogue) · C5: Physical Security

`PS-06` Protection against interruptions caused by power failures and other such risks

Document and install supply resilience for production systems, covering N+1 power and cooling, correctly sized UPS and emergency generators tested at least annually, manufacturer aligned maintenance, and protection of power and telecommunications cabling inspected at least every two years.

Source: BSI C5 (121-criteria catalogue), PS-06. The statement above is our statement of the clause, read from the published text and cited so you can check it against the official text, not the instrument verbatim. Open BSI C5 (121-criteria catalogue) in the compliance library.

The edition of the catalogue is not stamped here; check the edition your attestation is issued against.

artefacts

held by a system

at each review

hard

to go live

Policy repository / GRC workspace

where the evidence lives

teal = a system already holds it · olive = produced at each review. To go live: easy when half or more of the artefacts are already held by a system, moderate from a quarter to a half, hard below a quarter.

These are the artefacts auditors commonly ask for on this requirement, our guidance rather than text from the standard. Your assessor decides what is sufficient in your context, and asks for samples across the period when a report covers one.

system holds itEvidence a system already holds

Battery capacity measurement results for each UPS string · Backup / DR tooling

periodic reviewEvidence produced at each review

Load bank and black start test report for the generator set · Backup / DR tooling
Cable distributor inspection record covering seals, earthing and patch documentation · Vulnerability scanner / patch tooling

governing documentDocuments that govern the control

Single line electrical diagram showing the N+1 arrangement per hall · Policy repository / GRC workspace
Fuel supply contract together with on site fuel stock readings · Policy repository / GRC workspace

First move

Mostly documents and reviews. Pull the 1 system-held artefact from your Backup / DR tooling on a schedule; put the documents under version control with an owner and review date, and log each review as a dated record with a named reviewer.

Common gaps auditors find

Generator started monthly off load so genuine capacity is never proven
UPS batteries beyond service life with no capacity measurement on file
Distributors inspected for tidiness but not for signs of tampering or undocumented patching
Resilience lost because both rack feeds trace back to one distribution board

Do this for your whole sheet

Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.

Build my evidence sheet

PS-05 Protection from fire and smoke · PS-07 Surveillance of operational and environmental parameters