Galvanized Junction Box (Waterproof and Resistant) | Wholesale Sale at a Cheap Price
The galvanized junction box is a very safe and robust enclosure for creating extensive electrical branches in various structures. This type of electrical junction box, due to having a galvanized coating, has very high resistance to rust and corrosion. Electrical conduits enter the main enclosure through the cavities present in the junction box body, and the electrical cables, by being placed inside the terminals, complete the branching operation in different directions.
Given the type of metal alloy used in the manufacture of the galvanized junction box, in addition to the chemical resistance related to the rustproof nature of the junction box, they also have acceptable resistance to physical stresses such as impact and the application of force and pressure. The presence of metal covers on the galvanized junction box provides conditions for the internal terminals to be placed under complete, all-around protection. Therefore, no type of external stress threatens the connections inside the galvanized junction boxes. In this article, we intend to discuss the physical specifications of these boxes as well as some of their features.
What Is a Galvanized Junction Box?
A galvanized junction box is a resistant metal enclosure used for the protection and management of the connection of electrical wires and cables in building services systems. These boxes are manufactured from steel sheet with a galvanized coating, which makes them resistant to moisture, rust, corrosion, and impact. The galvanized coating is usually created through hot-dip or cold galvanizing and enables the box to withstand harsh environmental conditions well, such as open spaces, industrial environments, workshops, and humid locations.
These boxes are used for dividing electrical branches, creating reliable connections between cables, and protecting them against external factors. The resistant design and diverse dimensions of these boxes have made them widely used in construction, building services, and industrial projects. In addition to strength, the galvanized junction box also increases electrical wiring safety and plays an important role in preventing potential hazards such as short circuits or electrical leakage.
Types of Galvanized Junction Boxes
The galvanization process in junction boxes is carried out in cold and hot-dip forms and with various zinc thicknesses. Depending on the environment in which these boxes are to be installed, suitable types must be used. In conditions where none of these boxes are approved by the project engineer, it is also possible to purchase a custom junction box in accordance with the buyer’s expected specifications.
Hot-Dip Galvanized Junction Box
The hot-dip galvanized junction box is designed for harsh and long-term conditions and is usually installed in environments with high humidity, dust, or chemicals. The galvanizing process of these products is such that the metal parts are placed inside a molten zinc bath so that a layer of molten zinc metal is deposited on them. If your project is an open space such as a garden, rooftop, open parking lot, or factory yard, this model is the best choice.
Cold Galvanized Junction Box
The cold galvanized junction box is more suitable for indoor and dry environments and is usually installed in residential buildings, offices, shops, and upper floors of buildings where the walls are dry. The galvanizing process of these boxes is carried out by spraying, and the thickness of the zinc metal on them is less than the hot-dip type. The appearance of these boxes is shinier and smoother than the hot-dip models, and this very matter makes them the best choice for surface-mounted projects.
Maintenance Guide and Increasing the Service Life of the Galvanized Junction Box
Observing standard periodic maintenance instructions, in addition to ensuring functional safety, significantly increases the useful service life of this equipment. The following items should be included in the periodic maintenance checklist:
Periodic inspection and electrical cleaning: Technical inspection of these parts is mandatory every 6 months. For this purpose, the junction box cover must definitely be opened, and the dust and contamination inside it must be removed with industrial vacuum devices.
Evaluation of sealants and sealing gaskets: Annual inspection of the rubber gaskets and sealing systems around the cover of the galvanized junction box is essential. If cracking, brittleness, or loss of elasticity is observed, immediate replacement must be carried out.
Torque control of mechanical connections: Environmental vibrations and thermal expansion may cause bolts and nuts to loosen. Using special devices or visual inspection, identify loosened bolts and nuts and repair them.
Repairing the galvanized coating: In the event of mechanical damage to the galvanized coating that causes the loss of the zinc layer, it must be repaired immediately.
Difference Between Galvanized Junction Boxes and Plastic and Aluminum Boxes
Junction boxes are divided into various types based on body material, the most important of which are the galvanized, plastic, and aluminum types. Among these, the galvanized junction box, due to its high resistance to moisture, corrosion, and impact, is considered a suitable choice for industrial and semi-industrial environments. In contrast, plastic boxes are often used in indoor environments with low humidity and are weaker than the galvanized type in terms of mechanical strength.
Aluminum boxes are also lighter and have acceptable corrosion resistance, but they are more expensive and may deform under severe impacts. Therefore, depending on the type of project and environmental conditions, the correct selection of the type of junction box is very important. The galvanized junction box is usually considered an economical and resistant choice for harsh environmental conditions.
Key Points for the Proper Installation of Galvanized Junction Boxes for Greater Safety
The correct installation of the galvanized junction box plays an important role in the proper functioning of the electrical wiring system. The first point is selecting a suitable location for installation; it must be ensured that the box is installed in a place away from direct moisture and extreme heat, unless the box has the appropriate IP standard for these conditions. The next point is using resistant metal clamps and bases during installation, which prevents vibration and potential damage over time.
Internal wiring must also be carried out in compliance with safety standards, so that the wires are placed inside the box without pressure and twisting, and the entry and exit of cables are secured with the help of suitable glands. Also, using a resistant cover with an appropriate lock is recommended to prevent the entry of dust and external factors. Observing these points can increase the useful life of the equipment and prevent potential hazards such as short circuits.
Technical Specifications and Features of the Galvanized Junction Box
Galvanized junction boxes are manufactured from completely resistant steel sheets, which, despite their small thickness, have a very high structural density.
Circular cavities are provided in the body of the galvanized junction boxes for the entry of electrical steel conduits. These cavities are in a punched form, which are also referred to as knock-out holes.
They have very diverse sizings, designable both in square and rectangular shapes. The minimum size of these boxes is 10×10 centimeters, and their maximum dimension is 30×30. Of course, the mentioned sizes are according to defined standards, but they can also be customized based on the customer’s needs. In the next section, a detailed explanation of the sizing details of these parts will be provided.
They can be used in surface-mounted and flush-mounted forms, and their usage position depends on the limitations present in the structure. If your project is implemented in a flush-mounted manner, using a floor junction box is an ideal choice so that the wall surface is maintained and the installation of connections is easily carried out.
The thickness of the galvanized junction box sheet is in dimensions of 0.7 millimeters and 0.9 millimeters. Usually, greater thicknesses are selected for boxes with the largest size.
These boxes support a wide range of steel conduit types based on their size. Therefore, at the time of purchasing them, be sure to pay attention to the punch size of the box body so that it is compatible with the electrical steel conduit.
Dimensions of the Galvanized Junction Box
In the previous section, the minimum and maximum sizes of the galvanized junction box were discussed. However, let us provide complete information on all the sizes currently available in the market for these boxes. The sizes considered for galvanized junction boxes are as follows:
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۱۰×۱۵
۱۵×۱۵
۱۵×۲۰
۲۰×۲۰
۲۰×۳۰
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All the mentioned dimensions are in centimeters. However, for a complete introduction of the galvanized junction box size, the variables of length, width, as well as depth or height are usually provided. The depth and height of the junction boxes are usually in sizes of 5 centimeters and 6 centimeters. Greater depths relate to junction boxes of 20×30 centimeters and above. Among these sizes, the 20×20 galvanized junction box is one of the most widely used models, creating a good balance between internal space and external dimensions. To choose the correct size of the junction boxes, the number of branches as well as the scope of your electrical cabling project must definitely be precisely evaluated. Of course, these precise evaluations also apply to the selection of various types of aluminum junction boxes.
Types of Conduit Sizes for Use in the Galvanized Junction Box
As mentioned, there are cavities in the electrical junction box body for the entry of electrical steel conduits. These cavities, in terms of diameter, are determined based on the conduit size. Generally, an increase in conduit size naturally entails an increase in its diameter. Conduits with larger diameters must definitely have junction boxes suitable for this size used with them. In general, the types of steel conduit sizes used for various dimensions of the galvanized junction box include PG13.5, PG16, and PG22.
The Possibility of Correct Management of Cable Connections Inside the Junction Box
Using the galvanized junction box, you can have precise planning for managing cable connections inside the junction box. Making changes will be easily feasible, and you only need to establish or disconnect the current inside the junction box according to the type of your cabling system. Due to the presence of completely insulated terminals, the safety of the connections will be very high. Furthermore, due to the complete coverage of the connection point by the galvanized junction box, there is no possibility of unintentional contact with the cable connections inside the box.
Suitable Environments for Using This Type of Junction Box
Generally, there are three types of junction boxes, which include the aluminum junction box, the plastic junction box, and the galvanized junction box. Aluminum types, due to their beautiful appearance, are usually used abundantly in public environments and commercial places. Plastic types are also used for precisely this reason. However, the galvanized junction box, in terms of application type, is more commonly used in industrial sheds and halls. One of the reasons for this may be their appearance, which is more suited for use in workshops and industrial production environments. Be sure to determine the usage position of these junction boxes at the time of purchase so that you can purchase exactly the correct type.
Purchasing Various Types of Junction Boxes from Rafi Industrial Group
The galvanized junction box is one of the very popular products offered to customers at Rafi Industrial Group. In addition to these products, you can also purchase their aluminum types such as the 10×10 aluminum junction box, the 15×15 aluminum junction box, and the 20×20 aluminum junction box. Of course, round aluminum junction box types are also available. This very high variety in products provides conditions for you to purchase these parts according to the project’s needs. To receive precise information about the price and other details, please contact our experts.
