Electrical Safety and Hazard Awareness
Electrical Safety and Hazard Awareness tests whether a Level 1 technician can recognize shock and arc-flash hazards, establish boundaries, and work under lockout/tagout and, when justified, an energized-work permit. The exam expects NFPA 70E vocabulary and practical judgment, not heroics.
Core rules
- Treat every conductor as energized until absence of voltage is verified with a tester rated for the voltage and category, checked on a known source before and after.
- Shock approach boundaries are limited, restricted, and prohibited. The arc-flash boundary comes from an incident-energy analysis or tables; it is not the same as a shock boundary.
- Unqualified persons stay outside the limited approach boundary. Qualified persons cross only after risk assessment, shock protection, and arc-rated PPE.
- Lockout/tagout means notify, isolate, lock and tag, release stored energy, and verify absence of voltage at the point of work.
- Inspect test leads, fuses, and instrument CAT rating for the location. Damaged leads are removed from service.
Worked example
A 480 V fixed motor starter has exposed fixed parts. NFPA 70E Table 130.4(E)(a) lists a 3 ft 6 in limited approach boundary for 301-750 V fixed circuit parts. A technician without qualified-person status must stop 3 ft 6 in away. A qualified technician still de-energizes for typical testing; if energized work is justified, the technician uses the risk assessment, voltage-rated gloves, arc-rated clothing, and insulated tools, and does not cross the restricted boundary unless the task requires it. The reasoning is boundary first, then PPE, then procedure.
Traps
Using a non-contact voltage detector as the only verification; testing only phase-to-ground and missing a backfeed; relying on a breaker label; crossing a boundary because the task is quick; and wearing meltable synthetic base layers under arc-rated clothing.