Wide span cable tray

Are you looking for a stable cable support system? Do you have larger spans to bridge and want to ensure that the weight of the cables is carried safely? Your eibabo® shop offers you a huge range of cable support systems from well-known manufacturers at the best prices. With numerous modules you can meet almost all architectural requirements and lay cables and lines quickly, clearly and inexpensively. In this catalog you will find the product group 'Cable trays and wide-span cable trays'.

What are cable support systems?

With cable carrier systems, you can lay cables and lines vertically and horizontally through rooms, basements, production halls and across floors. In contrast to electrical installation conduits, the systems accommodate massive cable bundles and are therefore suitable for complex commercial systems and industrial applications. You can use this, for example, to lay the power supply for your building. Or you can use it to create measuring systems, control systems or other wired data transmissions for your system. The modular design ensures maximum flexibility combined with stability, security and cost efficiency.

Source: eibabo®, OBO Bettermann RKSM620 cable tray Image: OBO Bettermann RKSM620 cable tray

What are wide span cable trays?

Wide-span cable trays are part of cable carrier systems. These form long, rigid and rectilinear structures for laying electrical cables, conduits and cable ducts. Cable trays are typically made of galvanized steel, stainless steel or aluminium. There are also non-metallic cable trays. These are made of glass fiber reinforced plastic. The different cable tray types include:

Metal cable trays (perforated, slotted and in ladder form)
Small metal ducts (perforated, unperforated)
Cable trays made of non-metallic material (perforated, slotted and in ladder form)
Small ducts made of non-metallic material (perforated, unperforated)
Metal and non-metallic cable trays (unperforated)
Metal wire mesh cable trays

Why are some cable trays perforated and others not?

There are perforated and unperforated cable trays. Some cable trays consist 'only' of a wire mesh. The difference lies in the different possible uses. In most cases, open cable trays are used. These are in the form of ladders with rungs or a base, and side parts are provided with round or oblong holes. The holes have different functions:

ventilation

Current-carrying cables and lines can generate heat. The removal of excess heat is a safety feature, especially when these are laid in a bundle.

attachment

Cable ties and other fastening systems can be pulled through the holes. This allows the cables and lines to be sorted and fixed. In addition, fastening systems such as ropes, hanging brackets or support arms are connected to the channels through the holes.

weight reduction

Metal cable trays are solid. Cables and wires can also be very heavy. Larger installations often reach a high weight as a result. Perforated material is lighter and simplifies assembly.

junction

If individual cables and wires need to be routed out of the gutter, this can be done, for example, down through one of the larger holes.

water permeability

Sprinkler systems are installed in many areas for safety reasons. In an emergency, the water can drain through the holes in the cable trays.

TIP:

With wide-span cable trays, you can bridge a span of up to 3 meters.

In contrast, the unperforated cable trays are installed at other locations. Closed systems are used for:

Rooms with increased pollution

In a dusty environment, the laid cables and lines remain clean and can be replaced, checked or repaired more easily in an emergency. Additional gutter covers are used in these environments.

Electromagnetic shielding

Closed cable trays have a shielding effect. The influence of the cables on the environment (or vice versa) is significantly reduced through the use of unperforated cable trays.

What does suitability for functional integrity mean?

In the product descriptions of the cable support systems, some information on functional integrity is stored. This information is used to help you assess the suitability of each system for specific locations. Fire safety is an important issue in private, commercial, industrial and municipal buildings. There are special requirements for safety-relevant areas, also for the supporting devices of the electrical installation. Functional integrity describes how long the system must remain functional in the event of a fire.

Functional integrity of 30 minutes (E30) is required for electrical systems used to evacuate people and animals from a burning building. These are

fire alarm systems
Systems for alerting and issuing instructions
Security lighting and backup power lighting
passenger elevators
Smoke and heat extraction systems

Functional integrity of 60 or 90 minutes (E60 and E90) is necessary for the fire brigade to fight fires effectively and for complex evacuations. For example, it applies to

Water pressure booster systems for the supply of extinguishing water
Automatic extinguishing systems
Fire brigade lifts and bed lifts (in hospitals)
Ventilation systems and smoke protection pressure systems of safety stairwells
Elevator shafts and machine rooms

In these applications, use tested cable support systems that guarantee functional integrity of up to 90 minutes, depending on the requirements.

With what weight can cable trays be loaded?

When choosing the right cable tray or the optimal cable support system, its resilience is crucial. The carrying capacity must correspond to the expected cable weight.

TIP:

Calculate a reserve of 10% for possible subsequent installations when considering the load-bearing capacity.

Approximately 15 kg per meter and per 10 cm channel width apply as a guideline for the load capacity. With a channel width of 30 cm, for example, this results in a load-bearing capacity of around 45 kg per meter. With a channel width of 60 cm, the value increases to 90 kg per meter. Alternatively, look at the manufacturer's product specification or use the formula of DIN VDE 0639 T1 to calculate the maximum permissible cable load.

What accessories are available for wide-span cable trays?

At eibabo® you will find all the components you need to route cables and lines individually through your building. Examples of suitable accessories and add-on modules for wide-span cable trays are:

Gutter connectors, gutter bends, angle brackets and end pieces
Tees, crosses, branch pieces and reducers
Cable rakes, base plates, hanging brackets, covers
Support arms, cable ladders and fastening material

We carry complete systems from all leading manufacturers, including OBO Bettermann, Niedax, Unex, Pflitsch, Tehalit, Legrand Cablofil and many more. All items are characterized by special durability, longevity and quick assembly. These systems meet the highest standards of quality and professional processing in industry, commerce and marine.