EGSA EGSA Safety Standards and Code Compliance 1 — Questions and Answers
Question 1: Which NFPA standard specifically governs the installation and performance of emergency and standby power systems including generator sets?
- NFPA 70 (NEC)
- NFPA 110 (Correct answer)
- NFPA 101
- NFPA 72
Correct answer: NFPA 110
NFPA 110, Standard for Emergency and Standby Power Systems, covers the installation, testing, maintenance, and performance of generator-based emergency power systems.
Question 2: Under NFPA 110, what is the maximum allowable transfer time for a Level 1 emergency power supply system (EPSS) to restore power after a utility failure?
- 5 seconds
- 10 seconds (Correct answer)
- 15 seconds
- 30 seconds
Correct answer: 10 seconds
NFPA 110 Level 1 systems must restore power within 10 seconds of loss of normal power to protect life safety loads.
Question 3: What NEC article governs the wiring requirements for emergency systems, including circuits supplied by on-site generators?
- Article 445
- Article 700 (Correct answer)
- Article 517
- Article 230
Correct answer: Article 700
NEC Article 700 covers the installation of emergency systems, including wiring, transfer equipment, and sources of power for life safety applications.
Question 4: Which OSHA standard addresses hazardous energy control (lockout/tagout) procedures that must be followed when servicing generator sets?
- 29 CFR 1910.147 (Correct answer)
- 29 CFR 1910.303
- 29 CFR 1910.269
- 29 CFR 1910.132
Correct answer: 29 CFR 1910.147
OSHA 29 CFR 1910.147, The Control of Hazardous Energy (Lockout/Tagout), requires written procedures to isolate electrical, mechanical, and fuel energy before servicing generators.
Question 5: What does the EGSA classification 'Level 1' for a generator set signify?
- The generator is rated for prime power only
- Failure of the equipment to perform could result in loss of human life or serious injuries (Correct answer)
- The unit meets minimum emission standards for Tier 1
- The set is rated for indoor installation only
Correct answer: Failure of the equipment to perform could result in loss of human life or serious injuries
EGSA and NFPA 110 define Level 1 as installations where failure of the equipment to perform could result in loss of human life or serious bodily harm, such as hospitals.
Question 6: Which EPA regulation establishes exhaust emission standards (Tier standards) for stationary diesel engines used in generator sets?
- 40 CFR Part 60 (NSPS)
- 40 CFR Part 89
- 40 CFR Part 1039 (Correct answer)
- 40 CFR Part 63 (NESHAP)
Correct answer: 40 CFR Part 1039
EPA 40 CFR Part 1039 establishes the Tier 1–4 emission standards for compression-ignition stationary engines, including diesel generator sets.
EGSA EGSA Safety Standards and Code Compliance 1
Which NFPA standard specifically governs the installation and performance of emergency and standby power systems including generator sets?