Which fields should be shown?
Show the source, destination, switching or bypass equipment, tags, normal or maintenance state and approved reference.
| Field | Question |
|---|---|
| Source | Where does power come from? |
| Destination | Which load or bus is supplied? |
| State | When is the path used? |
| Control | Which approved logic applies? |
Sources: Telecommunications Industry Association: ANSI/TIA-942 Telecommunications Infrastructure Standard for Data Centers, Uptime Institute: Tier Standard: Topology
How should a bypass ambiguity be handled?
Record the source and route the operating definition to the responsible engineer. Do not infer redundancy or maintenance procedure from a label alone.
Common questions
What else should the bid team know?
Does a bypass line prove redundancy?
No. Review the approved topology and operating basis.
Can the drafter define the switching sequence?
No. The approved control and operating basis comes from the project team.
Who signs off the diagram?
The responsible registered engineer 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