Class 2 and 3 circuits shall not be placed in cables, compartments, cable trays, outlet boxes or raceways with electric power circuits.

Class 2 and 3 circuits shall not be placed in cables, compartments, cable trays, outlet boxes or raceways with electric power circuits.

• A. they are allowed to share raceways with electric power circuits
• B. they may be placed in the same cables or raceways
• C. they shall be separated by a shielding barrier when in the same enclosure
• D. Class 2 and 3 circuits shall not be placed in cables, compartments, cable trays, outlet boxes or raceways with electric power circuits.

Answer: (D)

The main idea is safety through separation: Class 2 and Class 3 circuits are low-energy, but they must be kept physically separate from electric power circuits to prevent potential hazards and interference. If these low-voltage conductors share the same cables, compartments, cable trays, outlet boxes, or raceways with higher-energy power circuits, faults, heat, or electrical noise from the power side can compromise insulation, raise temperatures, or affect the performance of the low-voltage systems. Keeping them in separate pathways ensures that overcurrent events, heat, and electromagnetic interference on power circuits won’t impact the low-voltage circuits, and it helps maintain appropriate protection and reliability. Therefore, the rule is they shall not be placed together in the same physical spaces with electric power circuits.

The main idea is safety through separation: Class 2 and Class 3 circuits are low-energy, but they must be kept physically separate from electric power circuits to prevent potential hazards and interference. If these low-voltage conductors share the same cables, compartments, cable trays, outlet boxes, or raceways with higher-energy power circuits, faults, heat, or electrical noise from the power side can compromise insulation, raise temperatures, or affect the performance of the low-voltage systems. Keeping them in separate pathways ensures that overcurrent events, heat, and electromagnetic interference on power circuits won’t impact the low-voltage circuits, and it helps maintain appropriate protection and reliability. Therefore, the rule is they shall not be placed together in the same physical spaces with electric power circuits.