Can BA cables be routed through security cable trays

BA (Building Automation or fire alarm) cables can be routed through security cable trays if they comply with NEC Article 760.139, which permits power-limited fire alarm circuits to share trays with communications circuits under proper conditions.

NEC Compliance and Code Considerations

According to the National Electrical Code (NEC) Article 760.139, two or more power-limited fire alarm (PLFA) circuits and communications circuits are allowed to be installed within the same cable tray, raceway, or enclosure. This includes BA cables used for fire alarm or building automation systems, provided they are tray-rated and meet the required separation and installation standards .

• Separation Requirements: While sharing a tray is permitted, maintaining physical separation (e.g., 6 inches where possible) between different types of circuits is recommended to reduce interference and facilitate maintenance .
• Cable Type: Only approved tray-rated cables should be used. These cables are designed to withstand heat, moisture, and mechanical stress typical in cable tray environments .
• Segregation from Power Cables: High-voltage power cables should still be routed separately from BA or fire alarm cables to prevent electromagnetic interference and ensure safety .

Practical Installation Tips

• Tray Selection: Use trays suitable for low-voltage and power-limited cables, such as ventilated or solid-bottom trays, depending on environmental conditions and heat generation .
• Cable Management: Organize cables by type and function to simplify maintenance and troubleshooting. Proper management reduces the risk of damage and ensures compliance with fill capacity limits .
• Firestop and Penetrations: Ensure that any tray penetrations through walls or floors comply with firestop requirements to maintain building safety .

Summary

BA cables can be routed through security cable trays alongside other low-voltage or communications circuits if:

1. They are tray-rated and approved for the application.
2. NEC Article 760.139 guidelines are followed.
3. Proper separation from high-voltage power cables is maintained.
4. Cable management, tray fill, and firestop requirements are observed. Following these practices ensures code compliance, operational reliability, and safety in mixed-cable installations.