Electricity meter routed via cable tray

Electricity meters can be safely routed via cable trays if proper standards, spacing, and grounding practices are followed.

Cable Tray Selection and Standards

Cable trays are designed to support and organize electrical cables in commercial, industrial, and utility installations. For electricity meters, the tray must comply with recognized standards such as IEC 61537 or BS EN 61537, which ensure mechanical strength, electrical continuity, corrosion resistance, and fire safety. The tray material—steel, stainless steel, or aluminum—should be chosen based on environmental conditions, such as exposure to moisture, chemicals, or high temperatures.

Installation Considerations

Tray Type: For meter wiring, solid or ventilated trays are recommended to protect against mechanical damage and allow heat dissipation. Mesh trays can be used if visual inspection and airflow are priorities. Spacing and Support: Maintain proper support intervals to prevent sagging.

Typical rung spacing is 150–230 mm for small instrumentation and control cables. Support elements like wall brackets, suspended supports, or center suspensions should be used to secure the tray. Routing: Avoid sharp bends and maintain the minimum bend radius for cables exiting the tray to prevent insulation damage.

Horizontal and vertical bends, T-pieces, and crossovers should be installed using compatible fittings. Fill Ratio: Do not exceed the recommended fill capacity to prevent overheating. Proper ventilation is essential for heat dissipation.

Electrical Safety

Grounding: Cable trays often serve as a grounding path. Ensure electrical continuity along the tray and proper bonding to the main grounding system. Separation: Keep meter wiring separate from high-voltage or power cables to reduce electromagnetic interference and maintain signal integrity.

Protection: Use covers or barriers if the tray is in areas prone to physical damage or dust accumulation.

Maintenance and Compliance

Regular inspection is recommended to check for corrosion, loose fittings, or cable damage. Compliance with IEC or BS standards ensures long-term safety, reduces the risk of electrical hazards, and maintains system reliability. By following these guidelines, electricity meters can be routed via cable trays safely, efficiently, and in compliance with international standards.