Safety Practices & Procedures Flashcards

When working in a ceiling plenum space, which respiratory hazard is most commonly encountered during cable installation?

Answer: Fiberglass particles from insulation disturbance

Disturbing fiberglass insulation in plenum spaces releases fine particles that can be inhaled, requiring appropriate respiratory protection.

A cable installer notices a junction box with a missing knockout and exposed wiring. What is the correct first action?

Answer: Stop work in the area and notify the site electrician or supervisor

Exposed electrical wiring is an immediate shock hazard; work must stop and a qualified electrician must address the issue before continuing.

Which class of fire extinguisher is appropriate for an electrical fire in a server room?

Answer: Class C

Class C extinguishers use non-conductive agents suitable for energized electrical equipment fires.

When must a cable installer use a Ground Fault Circuit Interrupter (GFCI) protected outlet?

Answer: Whenever working near water or in damp locations

GFCI protection is required by OSHA and NEC whenever power tools are used in wet or damp environments to prevent electrocution.

What does the Safety Data Sheet (SDS) Section 8 provide information about?

Answer: Exposure controls and personal protective equipment

SDS Section 8 covers exposure limits, engineering controls, and required PPE for safe handling of hazardous materials.

A technician needs to drill through a fire-rated wall assembly. What must be done after routing the cable?

Answer: Seal the penetration with listed firestop material

Fire-rated walls must have all penetrations sealed with UL-listed firestop systems to maintain the wall's fire resistance rating.

Under OSHA standards, what is the minimum safe approach distance from unguarded overhead power lines carrying up to 50kV for unqualified workers?

Answer: 10 feet

OSHA 1926.416 requires unqualified workers to maintain a minimum 10-foot distance from energized overhead lines up to 50kV.