Which paths should be traced?
Start with the approved logic and device schedule, then follow each circuit through the schematic and terminal plan.
| Path | Check | Evidence |
|---|---|---|
| Trip | Source and breaker interface | Approved logic |
| Close | Permissive and interlock | Control philosophy |
| Alarm | Point and destination | I/O schedule |
| Test | Access and record | Test procedure |
| Terminal | External boundary | Terminal plan |
Which mismatch needs an engineering question?
Raise a missing contact, conflicting tag, unexplained interlock or unassigned terminal. Preserve both sources in the review note.
- Source reference
- Device tag
- Contact state
- Terminal reference
- Reviewer and status
What does a schematic issue review cover?
It covers source revision, circuit continuity, references, tags, notes and title block. It does not approve protection studies or live testing.
Common questions
What else should the bid team know?
What should a relay panel schematic include?
It should include each circuit path, device, terminal, external interface, source and review status.
Who reviews a relay panel schematic?
The drafter checks the set and the responsible engineer approves logic and protection content.
Does drafting approve the engineering design?
No. The responsible registered engineer makes design decisions and performs engineering sign-off.
Primary sources
- IEEE C2-2023 National Electrical Safety CodeIEEE Standards Association
- IEC 61936-1:2021International Electrotechnical Commission
- IEC 60617 Graphical Symbols for DiagramsInternational Electrotechnical Commission
- 29 CFR 1910.269Occupational Safety and Health Administration