Class 2 and Class 3 circuit conductors must maintain what minimum clearance from other low voltage conductors?

• A. 1 inch
• B. 2 inches (50 mm)
• C. 4 inches
• D. 6 inches

Answer: (B)

Class 2 and Class 3 conductors are low-voltage, power-limited circuits, and keeping them physically separated from other low-voltage conductors helps prevent insulation wear, arcing risks, and electrical interference when cables run together in the same enclosure or raceway. The minimum clearance specified is two inches (50 mm), which provides enough space so that contact between conductors is unlikely if insulation shifts or gets damaged. One inch is too close to reduce that safety margin, and four or six inches would be more than the code requires for this particular separation, making two inches the appropriate baseline for these low-voltage conductors.