South Carolina Lightning Protection Ultimate Exam 2026/2027
| Complete Questions & Answers | NFPA 780, UL 96A & Safety
SECTION 1 — GENERAL LIGHTNING PROTECTION THEORY
1. What is the primary purpose of a lightning protection system?
A. Prevent lightning from forming
B. Provide a controlled path for lightning current to ground
C. Increase the electrical resistance of a building
D. Eliminate all electrical surges
Answer: B
Explanation: An LPS provides a deliberately designed path for lightning
current from strike termination components through conductors and
grounding electrodes to earth.
2. Does a conventional lightning protection system prevent lightning
strikes?
A. Yes
B. Only on metal buildings
C. No
D. Only when surge protectors are installed
Answer: C
Explanation: A conventional LPS does not prevent lightning. Its purpose
is to intercept, conduct, and disperse lightning current in a controlled
manner.
,3. Which component normally provides the first point of contact for a
direct lightning strike?
A. Ground rod
B. Air terminal
C. Bonding jumper
D. Surge protector
Answer: B
Explanation: Air terminals, also called strike termination devices, are
installed at appropriate locations to intercept lightning strikes.
4. What is the function of a down conductor?
A. Increase voltage
B. Carry lightning current toward the grounding system
C. Store lightning energy
D. Disconnect the electrical service
Answer: B
Explanation: Down conductors provide a low-impedance path from the
strike termination network toward grounding electrodes.
5. What is the purpose of a grounding electrode?
A. To increase lightning voltage
B. To transfer lightning current into the earth
C. To protect only telephone equipment
D. To disconnect a circuit
Answer: B
,Explanation: Grounding electrodes provide the connection between the
lightning protection system and earth.
6. What does bonding accomplish in an LPS?
A. It increases potential differences
B. It reduces dangerous voltage differences between conductive
systems
C. It eliminates grounding
D. It replaces air terminals
Answer: B
Explanation: Bonding helps keep conductive objects at similar electrical
potential and reduces the likelihood of side flashing.
7. Lightning current is best described as:
A. A small steady current
B. A high-energy transient electrical discharge
C. A normal branch-circuit current
D. A battery current
Answer: B
Explanation: Lightning is a transient electrical phenomenon capable of
producing extremely high currents and rapid voltage changes.
8. Why is a low-impedance path important?
A. Lightning current changes rapidly
B. Lightning has no voltage
C. Ground rods have no resistance
D. It increases arc formation
, Answer: A
Explanation: Because lightning contains rapidly changing current,
conductor impedance and routing are important considerations.
9. Which condition increases the risk of side flash?
A. Proper bonding
B. Excessive potential difference between conductive objects
C. Short conductors
D. Proper grounding
Answer: B
Explanation: Side flash can occur when lightning current produces a
sufficiently high voltage difference between nearby conductive systems.
10. Which organization publishes NFPA 780?
A. OSHA
B. NFPA
C. UL
D. ANSI
Answer: B
Explanation: NFPA 780 is the National Fire Protection Association
standard for installation of lightning protection systems.
11. What does UL 96 primarily address?
A. Lightning protection components
B. Contractor licensing
C. Building foundations
D. Electrical service entrance design
| Complete Questions & Answers | NFPA 780, UL 96A & Safety
SECTION 1 — GENERAL LIGHTNING PROTECTION THEORY
1. What is the primary purpose of a lightning protection system?
A. Prevent lightning from forming
B. Provide a controlled path for lightning current to ground
C. Increase the electrical resistance of a building
D. Eliminate all electrical surges
Answer: B
Explanation: An LPS provides a deliberately designed path for lightning
current from strike termination components through conductors and
grounding electrodes to earth.
2. Does a conventional lightning protection system prevent lightning
strikes?
A. Yes
B. Only on metal buildings
C. No
D. Only when surge protectors are installed
Answer: C
Explanation: A conventional LPS does not prevent lightning. Its purpose
is to intercept, conduct, and disperse lightning current in a controlled
manner.
,3. Which component normally provides the first point of contact for a
direct lightning strike?
A. Ground rod
B. Air terminal
C. Bonding jumper
D. Surge protector
Answer: B
Explanation: Air terminals, also called strike termination devices, are
installed at appropriate locations to intercept lightning strikes.
4. What is the function of a down conductor?
A. Increase voltage
B. Carry lightning current toward the grounding system
C. Store lightning energy
D. Disconnect the electrical service
Answer: B
Explanation: Down conductors provide a low-impedance path from the
strike termination network toward grounding electrodes.
5. What is the purpose of a grounding electrode?
A. To increase lightning voltage
B. To transfer lightning current into the earth
C. To protect only telephone equipment
D. To disconnect a circuit
Answer: B
,Explanation: Grounding electrodes provide the connection between the
lightning protection system and earth.
6. What does bonding accomplish in an LPS?
A. It increases potential differences
B. It reduces dangerous voltage differences between conductive
systems
C. It eliminates grounding
D. It replaces air terminals
Answer: B
Explanation: Bonding helps keep conductive objects at similar electrical
potential and reduces the likelihood of side flashing.
7. Lightning current is best described as:
A. A small steady current
B. A high-energy transient electrical discharge
C. A normal branch-circuit current
D. A battery current
Answer: B
Explanation: Lightning is a transient electrical phenomenon capable of
producing extremely high currents and rapid voltage changes.
8. Why is a low-impedance path important?
A. Lightning current changes rapidly
B. Lightning has no voltage
C. Ground rods have no resistance
D. It increases arc formation
, Answer: A
Explanation: Because lightning contains rapidly changing current,
conductor impedance and routing are important considerations.
9. Which condition increases the risk of side flash?
A. Proper bonding
B. Excessive potential difference between conductive objects
C. Short conductors
D. Proper grounding
Answer: B
Explanation: Side flash can occur when lightning current produces a
sufficiently high voltage difference between nearby conductive systems.
10. Which organization publishes NFPA 780?
A. OSHA
B. NFPA
C. UL
D. ANSI
Answer: B
Explanation: NFPA 780 is the National Fire Protection Association
standard for installation of lightning protection systems.
11. What does UL 96 primarily address?
A. Lightning protection components
B. Contractor licensing
C. Building foundations
D. Electrical service entrance design
