Safety and Workplace Practices
Safety and Workplace Practices
This domain tests OSHA-style hazard control and NFPA 70E practices around fire alarm work: shock, arc flash, lockout/tagout, ladders, batteries, and testing. Fire alarm technicians often work near energized power supplies and in occupied buildings, so the exam favors practical hazard recognition.
Core rules
- De-energize before working on or near exposed conductors. Use lockout/tagout: notify, shut down, isolate, lock and tag, release stored energy, and verify with a meter rated for the category.
- Test the meter on a known source before and after the absence-of-voltage check. A non-contact tester is not a substitute for a direct-contact meter.
- If energized work is justified, an energized work permit, arc-rated PPE, insulated tools, and a second person are typically required. Never defeat an interlock or use a breaker as a switch for convenience.
- Use the right ladder and maintain three points of contact; do not work alone on a ladder with tools or a panel door.
- Lead-acid batteries present acid and hydrogen hazards; use eye protection, insulated tools, and ventilation. Lithium cells require the manufacturer's charging and disposal rules.
Worked example
A technician must troubleshoot a 120 V control circuit feeding a fire alarm panel. The correct sequence is to shut off the circuit, lock and tag it, verify zero voltage at the terminals with a CAT III meter, and then work. If the panel must remain live for troubleshooting, the technician needs an approved energized work permit, arc-rated PPE, and a second person - not just being careful.
Traps
Trusting a panel label instead of testing; using a CAT II meter on a feeder; locking out the wrong breaker; and disabling a fire alarm system for repair without notifying the building and fire department.