IEC 60728-11:2016

Overview

IEC 60728-11:2016 establishes the safety requirements for cable networks designed for television signals, sound signals, and interactive services. Published by the International Electrotechnical Commission (IEC), this standard applies to fixed systems and equipment, while also covering mobile and temporarily installed systems such as those in caravans. The aim is to ensure system safety, protect personnel and subscribers, and safeguard subscriber equipment in all applicable environments.

Designed as part of the broader IEC 60728 series, IEC 60728-11:2016 specifically prioritizes safety aspects, including requirements for earthing and overvoltage protection, mechanical stability, and bonding in cable network installations. This fourth edition incorporates significant updates reflecting technological advances and is harmonized with recent versions of related standards like IEC 62305 for lightning protection.

Key Topics

• Scope of Application
  • Fixed, mobile, and temporary cable networks for TV, sound, and interactive services
• Safety Requirements
  • Mechanical protection measures
  • Requirements for accessible parts and laser radiation management
• Equipotential Bonding and Earthing
  • Comprehensive guidelines for earthing and bonding in both meshed and star-wired systems
  • Provisions for galvanic isolation and fully isolated system outlets, including FTTH deployments
• Protection Against Overvoltages
  • Introduction of new symbols for overvoltage protective devices (OPD) and coaxial overvoltage protective devices (COPD)
  • Procedures for atmospheric overvoltage protection and elimination of potential differences, referencing the IEC 62305 series
• Remote Power Feeding
  • Extension and clear delineation of requirements for subscriber feeder remote voltage feeding
• Mechanical Stability
  • Requirements for the mechanical robustness of cable network structures and mast installations

Applications

IEC 60728-11:2016 is a critical reference for:

• Cable Network Operators and Installers: Ensuring new and upgraded network infrastructures meet minimum safety standards, including bonding, earthing, and mechanical stability.
• Building Designers and Electrical Contractors: Integrating cable network systems safely within residential, commercial, and public buildings, with consideration for coordination with existing power, water, and gas distribution systems.
• Television and Internet Service Providers: Protecting subscriber premises equipment from faults, overvoltages, and lightning risks, thereby reducing downtime and damage.
• Manufacturers of Cable Equipment: Aligning products-such as amplifiers, optical nodes, and related enclosures-with internationally recognized safety benchmarks.

The standard’s requirements help reduce hazards associated with electrical faults, atmospheric overvoltages (including lightning), and installation errors. It is especially valuable for installations in multi-dwelling units (MDUs), mobile applications, and remote or FTTH-enabled networks.

Related Standards

IEC 60728-11:2016 is best applied in conjunction with other international standards, including:

• IEC 60065: Audio, video, and similar electronic apparatus - Safety requirements
• IEC 60364 series: Low-voltage electrical installation standards, covering earthing and protection against disturbances
• IEC 60529: Degrees of protection provided by enclosures (IP Code)
• IEC 60728-2: Electromagnetic compatibility for cable network equipment
• IEC 60825 series: Safety of laser products, covering fiber-optic components
• IEC 61140: Protection against electric shock
• IEC 62305 series: Protection against lightning
• EN 50117 series: Coaxial cable requirements

Practical Value

Implementing IEC 60728-11:2016:

• Enhances the safety and resilience of cable networks for TV and interactive services.
• Reduces property and equipment damage risk from electrical fault currents and lightning.
• Supports regulatory compliance and industry best practices.
• Improves subscriber trust in the dependability of TV and broadband services.

By referencing IEC 60728-11:2016 in project specifications, stakeholders ensure cable networks deliver reliable service while prioritizing user safety and long-term infrastructure integrity.