Multi Cable Transit (MCT) systems are essential in various industrial sectors, providing a secure method for routing multiple cables and pipes through single openings in barriers such as walls, floors, and bulkheads. These systems are crucial in maintaining the integrity of the structures they penetrate, offering protection against fire, water, gas, and other environmental hazards. This guide provides a thorough understanding of MCT systems, including their components, installation process, and benefits, ensuring safety and functionality across diverse applications. By utilizing high-performance materials, MCT systems play a pivotal role in safeguarding people, the environment, and ensuring business continuity in harsh and hazardous applications.

Understanding Multi Cable Transit (MCT) Systems

MCT systems are engineered solutions designed to allow multiple cables and pipes to pass through a single opening while maintaining the barrier’s ability to resist fire and withstand environmental challenges. The components of an MCT system typically include frames, insert blocks, and sealing materials. These elements collaborate to form a tight seal that prevents the ingress of smoke, fire, water, and gases, thereby protecting both personnel and equipment. Specifically, the integration of cable and pipe transits, including pipe transits, is pivotal in safeguarding infrastructure against hazards and ensuring the safety of people, the environment, and business continuity across diverse settings such as offshore oil platforms, power plants, and ships.

Types of MCT Systems

MCT systems can be made from various materials, including steel, rubber, or a combination thereof, and are chosen based on the environmental demands of the installation site. These systems are classified mainly by their sealing capabilities:

  • Fireproof Transits: Designed to prevent the spread of fire between compartments.
  • Watertight Transits: Used to prevent water ingress, especially useful in marine and offshore applications.
  • Gas-tight Transits: Essential in chemical and power generation facilities to prevent harmful gases from spreading.

Furthermore, the importance of MCT systems extends to hazardous applications, where advanced polymer and non-corrosive materials offer protection in the most harsh and hazardous environments.

Key Benefits of Using MCT Systems

MCT systems offer several advantages:

  • Protection from Hazards: They safeguard against environmental dangers such as fire, water, and toxic gases. Additionally, MCT systems are designed to provide comprehensive protection against a wide range of environmental and operational risks, including blast, rodents, or other hazards, ensuring a complete risk assessment within the project design.
  • Durability: Suitable for use in harsh environments, they resist chemical, thermal, and mechanical stress.
  • Flexibility: The modular design of MCT systems allows for easy modifications and upgrades as system requirements change.

Installation Process of Multi Cable Transit Systems

The correct installation of MCT systems is crucial for their effectiveness. Here’s how these systems are generally installed:

Frame Installation: The frame is the backbone of the MCT system, providing structural support for the cables and ensuring a secure fit. It can be mounted directly onto surfaces, ensuring a robust installation even in challenging environments.

Sealing the Transit: After the frame installation, the next step is to seal the transit to prevent the passage of fire, water, or gas. This is where standard blocks come into play, as they are essential for creating a tight seal around the cables. Each block type, including insert blocks, blind blocks, handi blocks, add blocks, and U-blocks, is designed for specific cable types and sizes, ensuring a customized fit and optimal protection.

1. Preparation and Planning

  • Assessment of Needs: Identify the type and size of cables and pipes, considering the environmental conditions of the installation site.
  • Choosing the Appropriate MCT System: Select a system that matches the project's specific requirements regarding durability, flexibility, and protection level.

2. Installation Steps

  • Frame Installation: The frame is the support structure for the transit and is either bolted or welded into place. It must be properly aligned and secured to accommodate the transit’s load and environmental demands.
  • Inserting Cables and Pipes: Position the cables and pipes through the frame, standardizing and simplifying cable entries for easy installation. Use cable retention measures to ensure they stay in place. Insert blocks are then used to stabilize the cables and pipes temporarily.
  • Sealing the Transit: Apply sealing materials to fill any gaps, ensuring a tight seal to prevent the ingress of elements like dust, water, and gases. Incorporating pipe seals is crucial for sealing cables or pipes of varying diameters, enhancing safety and efficiency.
  • Testing and Adjustments: After installation, a comprehensive inspection and testing phase ensures the transit meets all safety and performance standards.

Maintaining MCT Systems

Regular maintenance is vital to extend the lifespan and effectiveness of MCT systems. Routine checks should include inspections for wear and tear, seal integrity, and overall system stability. Maintenance often involves adjusting or replacing worn-out components to preserve the system's integrity.

Applications and Considerations

MCT systems are widely used across industries where cable and pipe integrity is critical. These include:

  • Marine and Offshore: Systems are designed to withstand corrosive saltwater environments. MCT Brattberg is particularly noted for its heat resistance, watertightness, and pressure resistance, making it ideal for specialized applications like EMC cable transits and cable transits for EX zones.
  • Chemical Plants: Materials resistant to chemicals and extreme temperatures are favored.
  • Commercial and Residential Buildings: Focus on fire safety and minimizing noise pollution.


Multi Cable Transit systems play a pivotal role in ensuring the safety and functionality of facilities where cables and pipes penetrate barriers. Proper installation and regular maintenance of these systems are imperative in safeguarding equipment and personnel from potential hazards. With their robust design and modular nature, MCT systems offer a dependable solution tailored to meet the rigorous demands of various industrial applications, thereby reinforcing operational integrity and environmental safety.