FIGURE 1: Telecommunications Bonding System – Riser Diagram (Source: kW Mission Critical Engineering)
THE SCOPE OF ICT BONDING: MORE THAN JUST WIRE WORK ICT bonding encompasses a wide range of components within the ICT realm, including: 1. ICT spaces: rooms or portions of rooms containing ICT equipment and infrastructure. 2. Conveyance systems: cable trays, conduits, and non-continuous pathways 3. Cabling and hardware: both optical fiber and copper cables, and associated connecting hardware. 4. Bonding infrastructure: busbars, bonding conductors, and bonding connections such as lugs and clamps. 5. Electrical power interface: the standard addresses how the ICT bonding infrastructure interfaces with electrical power grounding systems. Comprehension of the various elements of this scope helps better understand the bonding requirements in modern telecommunications systems. THE ANATOMY OF ICT BONDING SYSTEMS An ICT bonding and grounding system aims to create a single, low-impedance electrical potential pathway to ground (earth) all ICT infrastructure elements. This includes cabling pathways, ICT spaces, structured
cabling, and ICT equipment (Figure 1). The key components of this system are:
• Primary Bonding Busbar (PBB) The PBB serves as the central point of connection between the ICT bonding infrastructure and the building's electrical grounding system. It is typically located in the telecommunications entrance facility space nearest the primary electrical service power panel or in a telecommunication cabling distributor near the building’s main earthing terminal (building service equipment/power ground) and acts as the origin point for the telecommunications bonding backbone (TBB). ISO/IEC 30129 requires one PBB associated with each main earthing terminal in a building. • Telecommunications Bonding Backbone (TBB) The TBB is a conductor that runs throughout the building, connecting all secondary bonding busbars (SBBs) to the PBB. It follows telecommunications backbone pathways, ensuring a continuous bonding path throughout the facility.
I
January/February/March 2025
37
Made with FlippingBook - Online catalogs