Capstone: A Safe Day on the Job (Integrated Safety Scenario)
This ties Module 5 together. You must service a breaker in an energized panel, then run conduit near an overhead 12 kV service drop. Every step touches a safety rule.
The safe sequence
| Step | Rule |
|---|---|
| Work the panel | De-energize and establish an electrically safe work condition (best control) |
| Lock it out | Apply your own personal lock + tag (Cal/OSHA Title 8 §3314) |
| Before touching conductors | Verify absence of voltage with a rated tester, proven live-dead-live |
| If it must be energized (testing) | Qualified person + proper PPE (+ EEWP where required) |
| Arc-flash clothing | rated in cal/cm² (arc-rated) |
| Ladder near the service drop | fiberglass (non-conductive) — never metal |
| Boom equipment near the 12 kV drop | keep ≥ 10 ft away (CA, up to 50 kV) |
| The overhead line | assume energized unless the utility confirms otherwise |
| Coworker shocked, still on the wire | de-energize / don't touch them directly |
| Temporary jobsite power | GFCI protects people, tripping at ~5 mA |