A ___ is equipped with a power-limiting source, thus reducing the potential for a large fault current.

A ___ is equipped with a power-limiting source, thus reducing the potential for a large fault current.

• A. surge protective device
• B. power-limited circuit
• C. low-voltage circuit
• D. Category 5 cable

Answer: (B)

Power-limited circuits are designed so the source feeding the circuit cannot deliver large fault currents. By keeping the available fault current low, these circuits reduce the potential energy of a fault, improving safety and influencing protection requirements. That’s why this option is the best match. A surge protective device protects against voltage spikes, not the steady fault current; a low-voltage circuit simply refers to operating voltage and doesn’t imply current limitation; and Category 5 cable is just a type of communication cable, not a mechanism for limiting fault current.

Power-limited circuits are designed so the source feeding the circuit cannot deliver large fault currents. By keeping the available fault current low, these circuits reduce the potential energy of a fault, improving safety and influencing protection requirements. That’s why this option is the best match.

A surge protective device protects against voltage spikes, not the steady fault current; a low-voltage circuit simply refers to operating voltage and doesn’t imply current limitation; and Category 5 cable is just a type of communication cable, not a mechanism for limiting fault current.