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What is a Cable Bus and What are its Advantages?

A cable bus is an electrical system made up of fully insulated conductors that have been mounted in a ventilated metal housing designed with cable support blocks. The cable support blocks installed in the metal housing help to maintain cable spacing and prevent short-circuiting.

This system also includes all necessary equipment connections, wall entrance seals, cables, flanges, elbows, fire stops, assembly hardware, offsets, and termination lugs and kits.

How Does it Work?

Why choose superior Cable Bus?
Typical applications of a cable bus system range from 1000 to 5000 Amps/600V, 5kV, and 15 kV.

It is used for a wide variation of busway lengths from relatively short feeders that are about 10 to 30 feet to electrical feeders that are several thousand feet in length. High-quality continuous conductors are designed in an engineered phasing arrangement and spacing to achieve superior performance.

This allows for a minimized impedance and voltage drop, an optimal balance of loads between the conductors, and maximum load-carrying capacity because of free air rated conductors. A good cable bus system utilizes special cable support blocks that provide quality cable bracing to withstand large momentary short circuit. These cables are mounted parallel to each other throughout the entire bus housing without interweaving.

Precautions to Take When Installing a Cable Bus System

Since potential accidents can cause significant damage, it is important to provide additional protection measures as voltage level increases. It is crucial to observe electrical safety in any installation as it helps to reduce your operation and maintenance costs. The best advice is to work with professional electrical design engineers to ensure your cable bus system installation meets the national electrical codes as well as local standards.

Advantages of a Cable Bus System

  • It is Easy to Install

Cable bus systems are easy to install compared to other electrical systems, as it does not require special tools or heavy lifting. Housing sections can be easily fitted to their designated spaces reducing the amount of time and labor spent on installation. Every project is designed and engineered to fit the particular application with all cable bus sections to fit your project needs. Short circuit braces allow easy installation of long vertical sections since interleaving or crossing of conductors is not required.

  • Superior Reliability

Cable bus systems that feature high-quality cables are reliable and eliminate faulty splices because they are continuous from one terminal to another. They utilize fully insulated conductors that are manufactured and designed to withstand the outdoor environmental factors such as moisture or sunlight. The metal casing is ventilated for both indoor and outdoor applications and does not require filter breathers, or heater strips to keep moisture out of their systems.

  • Affordable Pricing

Cable bus systems cost significantly less than conduit or non-segregated bus duct and wire systems in most electrical applications that exceed 1000 Amperes. The cost savings of a cable bus is even greater over other systems as the cost of copper or ampacity increases. There are no power losses from intermediate connections or splices in a cable bus since it is continuous. Since its conductors are properly space, phased, and secured, it has a lower voltage drop and a lower impedance that provide long-term energy savings.

  • Flexible and Versatile

A good cable bus system is designed to accommodate unexpected differences between the actual construction and engineered drawings with little or no delay. Additional cables and housing are provided to accommodate equipment that may be misplaced in the field. One of the greatest advantages that a cable bus has over other systems is that it can be easily cut or adjusted in the field if the equipment placement requires a shorter bus length.

  • Easy Maintenance

A cable bus system is easy to maintain unlike non-segregated phase bus duct systems that do not have space heaters, splices, and connections to re-torque. They are supplied in corrosion-resistant aluminum housing and may utilize stainless steel hardware to extend the service life of the system. A good cable bus system can last for a very long time without any problems because of its quality construction materials and ability to withstand large momentary short circuit.

Cable bus systems are designed to operate in the harshest environment. It does not require heater strips or thermostats since the enclosure is well ventilated, thus results in lesser failures. The use of a reliable wire management system allows for a simpler and safer installation. A cable bus system can be very useful in delivering electric current to power outlets, lighting fixtures, and HVAC equipment in your home or office.

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