How do the drawings divide the information?
Each drawing should have one clear job and cross-reference the details carried elsewhere.
| Drawing | Primary content | Key input |
|---|---|---|
| SLD | Power path and ratings | Approved topology |
| GA | Physical lineup and interfaces | Vendor outline |
| Schematic | Control and protection circuits | Approved logic |
| Schedule | Devices and settings references | Engineering data |
Which electrical reference applies in the US?
NFPA 70 is the National Electrical Code for electrical installations. The authority having jurisdiction and project documents determine the applicable edition and requirements.
Sources: National Fire Protection Association: NFPA 70, National Electrical Code
Common questions
What else should the bid team know?
Can a vendor outline be redrawn?
Yes, when the scope and source status are clear. Preserve the vendor reference and revision.
Should a GA publish generic clearances?
No. Use the approved project and equipment requirements rather than an unsourced generic value.
Who checks ratings?
The engineering team approves ratings. The drafter checks that supplied ratings are transcribed consistently.
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