Which records should be gathered?
Register the latest issued drawings, approved redlines, field change records, equipment data and relevant test or inspection evidence. Keep the source and approval status beside every proposed change.
| Change | Source record | Check |
|---|---|---|
| Equipment tag | Field record or approved change | Match asset register |
| Cable route | Marked-up plan | Check route evidence |
| Termination | Inspection record | Confirm from and to |
| Protection device | Approved change | Engineer review |
| Revision | Document register | Record supersession |
Sources: International Electrotechnical Commission: IEC 61936-1:2021, Occupational Safety and Health Administration: 29 CFR 1910.269
What should remain open?
Keep a change open when the source is unclear, the installed condition differs from the approved design or the responsible reviewer has not accepted the evidence. Do not use the as-built label to hide a missing record.
- Unverified field note
- Conflicting equipment tag
- Missing approval
- Unclear cable destination
- Unresolved design deviation
Who signs off the result?
The drafter prepares the controlled update. The responsible engineer and project team decide whether the evidence is sufficient and perform any required sign-off.
Common questions
What else should the bid team know?
Does drafting decide the substation design?
No. Drafting turns approved engineering inputs into controlled drawings. The responsible registered engineer makes design decisions and performs sign-off.
Can a drawing set use any symbol library?
Use the project drawing standard and approved symbol convention. Where a standard is specified, the project team confirms the applicable edition and licensed access.
What happens when a dimension is missing?
Show it as an open input or request the approved source. Do not invent a clearance, rating or equipment outline.
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