BGE Code Compliance & Standards 2 — Questions and Answers
Question 1: Under the National Electrical Code (NEC), what is the minimum burial depth for a rigid metal conduit (RMC) installed under a residential driveway?
- 6 inches
- 12 inches (Correct answer)
- 18 inches
- 24 inches
Correct answer: 12 inches
NEC Table 300.5 requires a minimum burial depth of 12 inches for RMC under residential driveways.
Question 2: Which ANSI standard governs the safety requirements for overhead electric supply and communication lines used by utilities like BGE?
- ANSI C2 (NESC) (Correct answer)
- ANSI C37
- ANSI C84.1
- ANSI Z535
Correct answer: ANSI C2 (NESC)
ANSI C2, the National Electrical Safety Code (NESC), governs overhead and underground electric supply lines for utilities.
Question 3: What does the term 'qualified person' mean in the context of OSHA 29 CFR 1910.269 for electric utility work?
- Any employee with more than one year of experience
- A person trained and knowledgeable in construction and operation of electric equipment and hazards (Correct answer)
- An employee holding a state electrician's license
- A supervisor with OSHA 30-hour certification
Correct answer: A person trained and knowledgeable in construction and operation of electric equipment and hazards
OSHA 1910.269 defines a qualified person as one trained and knowledgeable about electric equipment construction, operation, and associated hazards.
Question 4: Per the NESC, what minimum vertical clearance is required for a 7.2 kV distribution line over a public road in an urban district?
- 15 feet
- 18 feet
- 20 feet (Correct answer)
- 25 feet
Correct answer: 20 feet
The NESC requires a minimum vertical clearance of 20 feet for distribution lines up to 22 kV over roads in urban districts.
Question 5: Which regulation requires BGE and other utilities to have an effective written hazard communication program covering chemical hazards in the workplace?
- OSHA 29 CFR 1910.147
- OSHA 29 CFR 1910.1200 (Correct answer)
- NFPA 70E
- ANSI Z10
Correct answer: OSHA 29 CFR 1910.1200
OSHA 29 CFR 1910.1200 (Hazard Communication Standard) requires employers to maintain a written hazard communication program including Safety Data Sheets.
Question 6: In Maryland, which agency has primary authority to adopt and enforce the National Electrical Code for commercial and residential construction?
- BGE's compliance division
- Maryland Department of Labor (Correct answer)
- Maryland Public Service Commission
- Baltimore City Fire Marshal
Correct answer: Maryland Department of Labor
The Maryland Department of Labor oversees adoption and enforcement of the NEC for construction work throughout the state.
Question 7: When installing a pad-mounted transformer, which code primarily governs the required clearances from buildings and combustible materials?
- NFPA 13
- NESC Rule 214 (Correct answer)
- NFPA 70B
- IEEE Std 516
Correct answer: NESC Rule 214
NESC Rule 214 specifies the required clearances between electrical equipment such as pad-mounted transformers and buildings or combustible structures.
BGE Code Compliance & Standards 2
Under the National Electrical Code (NEC), what is the minimum burial depth for a rigid metal conduit (RMC) installed under a residential driveway?