Safety, Tools, and Jobsite Practices
What this domain covers
Field safety under Nevada's OSHA plan, correct tool use, protection of devices during construction, and the practices that keep testing from becoming an emergency.
Core rules
- PPE and access: eye protection, gloves, and hearing protection where notification appliances are being tested; ladders at the proper angle and three points of contact; lifts operated by trained personnel with fall protection as required.
- Lockout/tagout before working on panel power or battery banks. Remove jewelry, use insulated tools, and keep a spill kit and eyewash access when handling sealed lead-acid batteries; never mix battery sizes or ages.
- Meter safety: use a meter with an appropriate CAT rating, verify the function and range before probing, and never use a megohmmeter on addressable devices or signaling line circuits - the test voltage can destroy them.
- Construction protection: keep dust covers on detectors during dusty work and remove them before acceptance testing; vacuum or replace contaminated devices rather than testing them dirty.
- Impairments: never disable notification or detection without notifying the monitoring company, the building, and the authority, and implement a fire watch where the fire code requires it.
Worked example
Replacing batteries in a panel serving an occupied floor: notify the monitoring company and building engineer, place the panel in the documented bypass state, lock out AC and battery disconnects, don PPE and remove jewelry, swap batteries without mixing old and new, restore power, confirm the charger is charging, clear the trouble, verify the off-premises signal, and log the work. The alarm system is never left in bypass at the end of the shift.
Traps that cost marks
Leaving detector covers on at turnover; meggering a signaling line circuit; working live because "it's only 24 volts"; silencing alarms and leaving the system impaired without a fire watch; failing to document restoration.