Assuming there are no approved separations between conductors, which conductors are permitted in the same cable or raceway as power-limited circuit conductors?

• A. Class 2
• B. Class 1
• C. Class 3
• D. Class 4

Answer: (A)

When there are no approved separations between conductors, you can only mix in the same cable or raceway the conductors that are themselves power-limited at the same or lower level. Class 2 conductors fit that safe, low-energy category, so they are the ones permitted to share a raceway with power-limited circuit conductors. Higher-powered or differently insulated classes (like Class 1, Class 3, or Class 4) require separation or barriers to prevent interaction, so they’re not allowed to share without approved separations.