The cable ladder is another piece of cable support equipment that, due to its ladder-like structure, can route a high volume of electrical cables within a structure. For these components to best perform their role as an electrical cable support system or network, they need a series of secondary fittings known as cable ladder fittings. In addition to using structural fittings, the cable ladder also utilizes various types of cable ladder fittings that are usually installed between two sections of cable ladder.
Of course, structural connectors were discussed in detail in the cable tray fittings article, which you can study. These mentioned structural fittings are also used for cable ladders. However, in this article, we intend to examine the technical specifications of internal cable ladder fittings. This information includes their technical specifications and sizes. However, to some extent, minor changes can also be made on a custom basis in the production process of these parts so that they are designed according to the project’s needs.
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Electrical cable ladder fittings can be produced and used in lengths of 3 or 6 meters. The length of the ladders determines the number of bolts required for the connections. Obviously, as the length of the ladder increases, the number of bolts used will also increase. According to the explanations given so far in the article, various fittings are used for cable ladders, each with its own specific application. The most important matter when ordering and purchasing these fittings is quality and level of resistance.
To prevent these fittings and other electrical conduit fittings from rusting, a hot-dip galvanized coating is usually used. Therefore, these fittings demonstrate high resistance to weather conditions and moisture. The inside of galvanized ladder fittings will also be smooth and polished due to this galvanization and strengthening method. Fittings produced with a hot-dip galvanized coating have a silver color and will also maintain their aesthetic appeal. Therefore, in conditions where these fittings need to be installed exposed, they can be used with peace of mind.
The cable ladder connector is one of the most important components used in ladder installation, responsible for connecting, determining, and changing the direction of various sections. As you know, cable ladders are manufactured in limited sizes and dimensions; for this reason, on paths where several ladder sections are needed, the cable ladder connector is used to join two different sections and extend the cabling path. In addition, connectors are also used to connect the ladder to the cable tray and to keep the ladder fixed in place. The material of the connector varies according to cold and hot-dip galvanized cable ladders and is selected in accordance with the ladder; however, in general, the connector has high resistance to pressure, chemical changes, cable weight, etc., so that it does not cause financial or physical damage in the event of failure.
Connectors are produced in various types, including fixed and movable (adjustable), and feature hinges and bolts for joining two ladder sections. Since movable connectors have high resistance and efficiency, they are used in heavy industries, and their connection to industrial systems is carried out using CNC machinery. However, some employers use welding instead of connectors to join two cable ladders, which is not standard or proper practice due to the lower resistance and durability of the weld.
In addition to some cable ladder fittings, connectors also come in various types, which we will introduce below:
Side connector: This connector is used like two angle-shaped pieces, and its height varies depending on the height of the tray and ladder edges. At the beginning and end of this connector, two holes are created on the side so that the connection can be made from that point. Depending on the material of the cable tray, the tray side connector is produced in cold or hot-dip galvanized types.
Flat or straight connector (U-shaped): As you know, due to the limited sizes of cable ladders and trays, it is not possible to cover a long path with a single section. For this reason, flat or straight connectors are used to connect the openings of trays and ladders, continuing the cabling along a long and safe path. The width of this connector is determined according to the width of the tray and ladder and is produced in standard sizes.
Movable vertical connector for cable tray and ladder: This connector is used to join the ladder and tray in upward and downward directions at a desired angle. The dimensions of this connector are determined according to the height and thickness of the tray and are produced on a custom basis.
Movable horizontal connector for cable tray and ladder: This connector is used to adjust the ladder and tray in the horizontal direction at desired angles. The dimensions of this connector are also determined according to the size and thickness of the tray and ladder and will be produced for customers on a custom basis.
A cable ladder end cap is a part used at the end of the cable run to protect and prevent damage to the cables. This part, like other fittings, is produced from galvanized sheet to have high resistance to physical and chemical damage. It is important to know that all cable ladder fittings have a protective end cap.
The variety of electrical ladder fittings is very wide, and this means that you can use these fittings according to your needs and the type of electrical ladder selected. If you need to choose and purchase ladder fittings for electrical cables, you must definitely pay attention to the following important points.
One of the most important points for choosing these fittings is paying attention to the thickness of the sheet used. The sheets used can be 0.8 to 2 millimeters thick. Obviously, as the thickness of these sheets increases, their strength will also increase.
The material of cable ladder fittings can be hot-dip galvanized or coated steel to show high resistance to moisture and rust.
The fittings used for electrical cable ladders can be made in various colors, as it is possible to apply an electrostatic color coating to these electrical cable ladders. Also, if needed, the color can be applied as plain or textured.
One of the most important matters to examine when purchasing cable ladder fittings is the type of fittings required. The fittings can be used vertically or horizontally, each with different applications.
The height and width of the ladder can be considered for cable ladder fittings. In general, how wide the ladder is and how its height is considered will have a significant impact on the selection of these fittings. Therefore, the required fittings must be ordered based on the dimensions of the cable ladder.
As their name suggests, these cable ladder fittings play the role of an elbow, but their direction is vertical, meaning the electrical cables change direction vertically. The two types, internal and external, of these elbows indicate that in the internal vertical elbow type, the electrical cables are directed from the straight direction upwards. However, in the external vertical elbow type, the cables are directed straight from the upward direction with a 90-degree change of direction.
Vertical elbows are often also called internal and external risers, and this term is due to their vertical structure. In terms of technical specifications and size, they have three variables: width, height, and thickness. The width of these elbows ranges from 100 millimeters to a maximum of 800 millimeters. Their height is usually 40 millimeters, but they have the capacity and capability to reach up to 200 millimeters.
Their thickness increases with the increase in size, so you can request thicknesses of 1 millimeter, 2 millimeters, and even up to 4 millimeters on order. However, a thickness of 2 millimeters is a standard and defined value, and most parts are up to this thickness at maximum. However, the cold galvanized type of these elbows has different thicknesses, including 1 millimeter, 1.25, 1.5, 2, and 2.5 millimeters.
Adjustable elbows are a more advanced type of cable ladder fittings, meaning these parts have the ability to be moved and adjusted on two separate axes. This type of elbow has numerous advantages for electrical cables, as the electrical cables change direction or bend according to their own structure.
Therefore, this feature can significantly increase the safety of the electrical cables. A very important point to mention about this type of ladder fitting is that during a change of direction, a gradual deviation is created in the cables, meaning you will not witness a sharp bending of the cables. In terms of size, they are exactly similar to the previous type.
Horizontal elbows are one of the most common cable ladder connectors. These parts create a 90-degree change of direction in the horizontal path of the cables. Given the structure of these elbows, you will again observe a gradual change of direction. To put it more simply, if the cables were to change direction suddenly, this deviation would certainly cause damage to the body of the cables.
However, if this deviation takes place over two to three stages, the cables will change direction with the highest level of safety. The technical specifications and size of these elbows are also like the values mentioned at the beginning of the article. In terms of manufacturing material, all cable ladder fittings are designed and manufactured from high-grade steel material with two types of coatings: hot-dip galvanized coating and cold galvanized coating.
Tee and cross parts exist both in cable tray networks and in various types of cable ladders, and you can even see them in galvanized trunking ground networks. In fact, their structure and design type differ. The size of these parts is again similar to other ladder fittings, and their structural material is also of the same type. Tee parts receive the electrical cable at one point and route it to two separate paths.
You can also install these tees near the wall. Cable ladder fittings of the cross type are another type of these parts. Crosses have the capability to be used at the center of a structure, so you cannot install them near a wall surface, because in that case, you will only be able to use three of its paths.
Cable ladder reducers are fittings that are divided into three general types. These cable ladder fittings include left reducer, right reducer, and straight reducer. These fittings are used when you want to connect two cable ladders that have different cross-sections, one larger and one smaller.
On the other hand, the use of reducers is due to the reduction of cable volume along a path. In fact, if the size of the cable ladder is reduced, you will be forced to reduce the amount of cable loaded onto the ladder. These reducers provide precisely this feature for your cabling path.
Dear customers can contact us to receive precise pricing information on various types of cable ladder fittings. The experts and specialists of Rafi Industrial Group in the sales department, by fully introducing the parts and providing comprehensive technical details, can guide you towards a successful purchase. Obviously, these guidelines will be provided solely with the aim of achieving your satisfaction and building a safe project.
Cable ladder fittings are various components used to connect cable ladder sections together. These fittings include bolts, nuts, clamps, and other metal parts used to create an integrated and sturdy system for supporting and routing cables.
Cable ladder fittings are usually divided into two categories:
Vertical fittings: For connecting different sections of the cable ladder vertically.
Horizontal fittings: For connecting ladders together horizontally.
Appropriate fittings play a vital role in the safety and strength of the cable ladder system. High-quality fittings prevent the ladders from loosening or failing over time and keep the cables safely in place.
Type and thickness of the cable ladder: The fittings must match the material and size of the ladders.
Load capacity: The fittings must be capable of bearing the weight of the cables and other equipment.
Working environment: If the cable ladder is used in humid or corrosive environments, the fittings must be made of anti-rust or corrosion-resistant material.
Yes, cable ladder fittings should be periodically inspected and repaired. Bolts and nuts may become loose and need tightening. Also, the fittings should be checked for corrosion or damage caused by environmental conditions.
To prevent cable ladder fitting failure, using high-quality fittings, correct installation, and observing periodic maintenance and repair principles are essential. Also, overloading on the ladders must be avoided.
Yes, some cable ladder fittings are adjustable to allow for changing the direction or installation dimensions of the ladders. These fittings are especially useful in environments with space limitations or the need for specific adjustments.
Cable ladder fittings are usually made of stainless steel, aluminum, or galvanized steel. These materials are suitable for use in various industries due to their high corrosion resistance and great strength.
Although installing cable ladder fittings requires skill and appropriate tools, in many cases, these fittings can be installed with precise instructions. However, in industrial environments, it is better for the installation to be carried out by specialists.
