Which paths should be traced?
Start with the approved topology and follow utility, generator, UPS, switchgear, bypass and downstream distribution paths across the drawing set.
| Path | Check | Evidence |
|---|---|---|
| Source | Utility or generator boundary | Approved topology |
| Conversion | UPS and bypass route | Equipment schedule |
| Distribution | Feeder and panel tags | Load schedule |
| Alternate | Maintenance or alternate path | Project basis |
| Open items | Missing or conflicting input | Review register |
How should a rating conflict be handled?
Record both sources and route the conflict to the responsible engineer. Do not select the value that makes the drawing easiest to complete.
- Tag and source
- Affected path
- Rating conflict
- Decision owner
- Updated drawing reference
What is the final SLD issue check?
Check topology, tags, ratings, notes, cross-references, revision and review status. Keep engineering sign-off as a separate gate.
Common questions
What else should the bid team know?
What should a critical power SLD review include?
It should show source, paths, tags, ratings, bypass or alternate arrangements, open items and revision.
Who reviews a critical power SLD review?
The drafter checks consistency, while the responsible engineer approves topology and technical content.
Does drafting approve the critical power design?
No. The responsible registered engineer makes design decisions and performs engineering sign-off.
Primary sources
- ANSI/TIA-942 Telecommunications Infrastructure Standard for Data CentersTelecommunications Industry Association
- Tier Standard: TopologyUptime Institute
- NFPA 70, National Electrical CodeNational Fire Protection Association
- NFPA 110, Standard for Emergency and Standby Power SystemsNational Fire Protection Association