ELV system wiring & cable management

NGÀY ĐĂNG 18/09/2025

Admin

About 80% of problems in the ELV system often originate from incorrect wiring and cable management? A few small errors such as excessive bending, wiring mixed with strong power cables or lack of labels are enough to make the whole system unstable, prone to damage and costly to repair. So what are the technical standards for wiring so that the ELV system always operates safely, stably and sustainably?

The role and importance of wiring techniques in the ELV system

Wiring techniques in the ELV system play an important fundamental role in ensuring the system operates stably, safely and is easy to maintain. Below are the main points about the role and importance:

• Ensure performance & stability: Proper wiring helps stabilize the transmission signal, limit loss and reduce noise.
• Increase safety: Scientific layout reduces the risk of fire, electrical incidents, protects equipment and people.
• Aesthetic & Management Optimization: Neat cable system, easy to check - maintain - upgrade when needed.
• Long-term cost savings: Reduce technical errors, avoid having to replace/repair many times.
• Standards Compliance: Ensure ELV systems operate according to international standards, enhancing credibility and reliability.

ELV system wiring standards, principles and techniques

Comply with international & domestic standards

• TIA/EIA-568, TIA/EIA-569: Standards for network cables, cable layout and management.
• ISO/IEC 11801: International standard for telecommunications cable infrastructure.
• NEC (National Electrical Code): Standards for electrical safety, installation and explosion protection.
• TCVN & QCVN: National technical standards and regulations applicable to Vietnam.

Basic wiring principles

• Clear separation: ELV cables (weak) must be separated from power cables (strong) to avoid magnetic interference.
• Route in the shortest & straightest route: Reduce signal loss, easy to manage.
• Use pipes, trays, cable ladders: Protect cables, increase durability and neatness.
• Cable label marking & management: Clearly note each route for easy maintenance.
• Ensure cable bending radius: Avoid bending and breaking the core and reduce performance.
• Grounding control & anti-interference: Ensure safety and transmission quality.

ELV system wiring techniques

• Structured cabling: synchronized organization for multiple ELV systems.
• Twisted pair cable, fiber optic cable, coaxial cable: choose according to system needs.
• Patch panel & rack: collect cables to central cabinet for easy management.
• Cable route planning: shortest route, limit crossover.

Cable management in ELV system

Role of cable management

• Maintain transmission performance: avoid signal disturbance, interference, loss.
• Easy maintenance & upgrade: the cable system is scientifically arranged, easy to check and replace.
• Increase safety: reduce the risk of short circuit, damage due to overlapping cables.
• Aesthetic & professional: neat cables, enhance the image of the project.

Cable management principles

• Cable route planning: design the wiring diagram in advance to avoid cross-over.
• Use cable trays, cable ladders, conduits: protect and clearly route cables.
• Classify cables by function: LAN, CCTV, PA, Access Control... are arranged separately.
• Label and manage cable codes: easy to identify during maintenance.
• Ensure standard bending radius: avoid breakage, reduce signal transmission efficiency.

Common mistakes when wiring ELV

Not separating light power cables and power cables: Wiring together or too close to 220V, 380V power cables will cause electromagnetic interference and signal loss.

Unplanned wiring, overlapping due to lack of design diagram, messy cables cause difficulties in maintenance, easy to cause errors and loss of aesthetics.

Not complying with the bending radius of the cable: Excessive bending and bending of the cable leads to reduced transmission efficiency and easy core breakage.

Not tagging, not grouping cables (LAN, CCTV, PA, Access Control...) leads to confusion when checking and repairing.

Not using protective accessories (cable trays, conduits, cable ladders) makes the cable susceptible to collision, insect bites, mechanical impact leading to rapid damage.

Using poor quality or substandard cables leads to weak signals and short lifespan.

Wiring too long, not calculating the optimal distance, exceeding the transmission limit leads to strong signal loss.