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Is Your Data Center Overlooking This Critical Cable Safety Standard?

In modern data center infrastructure, the safety and reliability of cable systems are fundamental to ensuring business continuity. The UL 1277 TC-ER standard provides a high level of safety and installation flexibility for power-limited circuits within data centers. This article offers a systematic overview of this important standard and its core value.

What is TC-ER?

TC-ER is a technical term defined as follows:
  • TC (Tray Cable):​ This denotes cables designed specifically for installation in cable trays or ladder racks.
  • ER (Exposed Run):​ This rating indicates that the certified cable can be installed directly on support systems without conduit protection, under specified conditions.
Therefore, UL 1277 TC-ER​ refers to Tray Cables that comply with the UL 1277 standard (for Power-Limited Fire Protective Signaling Circuits) and carry an Exposed Run rating. They are commonly used for low-power circuits in data centers, such as control, signaling, and communication systems.

Key Characteristics of TC-ER Cables

Cables meeting the UL 1277 TC-ER standard possess several critical characteristics:
  • High Flame Resistance:​ They pass rigorous vertical tray flame tests, effectively inhibiting the spread of flame.
  • Low Smoke Zero Halogen (LSZH):​ The cable materials produce low smoke and no corrosive halogen gases when exposed to fire, helping to protect sensitive equipment and ensure personnel safety.
  • Good Mechanical Durability:​ They are typically designed to be resistant to abrasion and crushing, suitable for the physical demands of data center environments.
  • Installation Efficiency:​ The “ER” rating simplifies installation by allowing direct placement.

Why UL 1277 TC-ER Cables are Essential for Data Centers

Selecting cables per this standard is based on practical considerations:
  • Enhanced Safety Level:​ Their inherent flame-retardant and LSZH properties directly meet the high fire safety requirements of data centers.
  • Optimized Deployment Efficiency:​ Eliminating conduit saves significant material and labor costs, shortening project timelines.
  • Improved Infrastructure Management:​ A cleaner cable layout facilitates better airflow management within cabinets, enhancing cooling efficiency.
  • Assured Long-Term Operation:​ Products conforming to stringent industrial standards offer greater quality and reliability assurance.

Considerations for Selecting Compliant Cables

To ensure performance and safety, consider the following:
  • Verify Certification Marking:​ Compliant cables must be clearly and continuously marked on the jacket with “UL 1277  TC-ER”.
  • Match Electrical Specifications:​ Select the appropriate cable type based on application requirements (e.g., voltage, current, shielding needs).
  • Choose a Reliable Supplier:​ Partner with reputable manufacturers like JZDCable, who possess the necessary expertise and ensure source compliance.

Conclusion

The UL 1277 TC-ER standard provides a safe, efficient, and cost-effective solution for critical cabling in data centers. It represents a rational choice for modern data center infrastructure.
JZD Cable offers reliable UL 1277 TC-ER cable products and technical support for your projects. Contact us today​ for detailed product information and technical consultation.

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