What is the primary purpose of electrical cable trunking in rail signaling systems?

What is the primary purpose of electrical cable trunking in rail signaling systems?

• A. Insulates electrical circuits
• B. Cables that connect signal equipment to signal boxes (2200 V signal feeder)
• C. Guides trains
• D. Stores electrical energy

Answer: (B)

Electrical cable trunking serves as a protected, organized channel for cables between signaling equipment and signal boxes, including high-voltage feeders around 2200 volts. By enclosing cables in a single trunk, it protects them from physical damage and environmental hazards, keeps cables neatly grouped for easy maintenance, and helps ensure safe separation from other systems. The insulation of circuits is provided by the cable insulation itself, not by the trunking. Trunking does not guide trains and does not store energy.

Electrical cable trunking serves as a protected, organized channel for cables between signaling equipment and signal boxes, including high-voltage feeders around 2200 volts. By enclosing cables in a single trunk, it protects them from physical damage and environmental hazards, keeps cables neatly grouped for easy maintenance, and helps ensure safe separation from other systems. The insulation of circuits is provided by the cable insulation itself, not by the trunking. Trunking does not guide trains and does not store energy.