Which checks should happen first?
Start with the drawing register and approved topology. Then compare the SLD to the equipment schedule, arrangements, controls diagrams and downstream feeders.
| Pass | Question | Evidence |
|---|---|---|
| Document | Are the current files used? | Register and addenda |
| Topology | Do paths match the basis? | Approved markup |
| Coordination | Do tags and ratings align? | Schedules and drawings |
| Interfaces | Are boundaries visible? | Interface notes |
| Issue | Is review status clear? | Transmittal or register |
Sources: Telecommunications Industry Association: ANSI/TIA-942 Telecommunications Infrastructure Standard for Data Centers, Uptime Institute: Tier Standard: Topology
How should conflicts be handled?
Record both sources, identify the affected sheet and route the issue to the responsible engineer. A drafting correction is not a substitute for an approved design decision.
Sources: National Fire Protection Association: NFPA 70, National Electrical Code, National Fire Protection Association: NFPA 110, Standard for Emergency and Standby Power Systems
What should be retained?
Retain the source register, review comments, response status, changed sheets and final issue record. This gives the project team a usable audit trail for later revisions.
Common questions
What else should the bid team know?
Does this service select the critical power topology?
No. The engineer or design team supplies the approved topology. Drafting makes the approved arrangement readable and traceable.
Can a drawing show a rating that is missing from the schedule?
No. Raise the missing or conflicting input as an open item rather than guessing the rating.
Who performs engineering sign-off?
The registered engineer responsible for the job performs engineering sign-off. The drafter checks the drawing against the supplied inputs.
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