Smc distribution box

Types of SMC distribution boxes

• Distribution Box Type S1

  The distribution box type S1 is widely employed in low-voltage electrical systems and is constructed from neat SMC glass fibre reinforced plastic. It is designed for simple, surface-mounted installation. It has a transparent cover that provides easy viewing of the contained components and an IP65 rating for dust and water protection. This distribution box is versatile for indoor and outdoor use and enables a quick domestic circuit distribution or control applications. It is important to note that the type S1 SMC distribution box has a temperature working range of -40 to +120 degrees Celsius and is noted for its excellent corrosion resistance.

• Distribution Box Type S2

  Distribution Box Type S2 is a surface-mounted, compact solution designed for low-voltage electrical systems. It comes with IP66 protection and transparent covers for simplified monitoring. SMD glass fibre reinforced plastic is the primary material for the box, ensuring durability and lightweight properties. The S2 is commonly used in commercial buildings for circuit management. Its water and dust-resistant design is suitable for outdoor and hazardous environment uses.

• Distribution Box Type S3

  Type S3 distribution box is designed for tropical and extreme conditions. This is due to its high impact resistance and rated IP67 properties for water and dust protection. The curved shape of the S3 increases the wind load if installed in open locations. It is also certified in accordance with international standards and has a long service life. This distribution box is therefore suitable for extreme outdoor conditions due to its ability to withstand severe rain and humidity.

• Distribution Box Type S4

  The Distribution Box Type S4 is a compact, surface-mounted solution for managing low-voltage electrical systems. Its robust design consists of SMC glass fibre reinforced plastic with properties of IP66 for water and dust resistance. The S4 is used in industrial settings where mechanical durability is essential. The smooth and rounded surface of the S4 reduces the wind effects and lowers the chance of debris accumulation, therefore aiding maintenance.

Industry applications of SMC distribution boxes

• Electrical Engineering

  SMC distribution boxes are widely used to protect electrical wiring and components within many environments. Their IP65 rating protects against dust and water, making them suitable for outdoor and industrial electrical installations.

• Manufacturing and Industry

  Within manufacturing plants, SMC distribution boards house and protect the machinery's electrical control systems. Since Manufacturing Plants have extreme temperatures, high humidity and dust, the SMC distribution boxes were created to provide a reliable electrical enclose under these harsh conditions.

• Telecommunications

  In telecommunications, the SMC distribution boxes protect fiber optic and copper cabling systems. Their strength, lightweight and corrosionproof nature allow for simple installation in open and underground systems.

• Agricultural

  In agriculture, SMC Distribution boxes are used to protect irrigation and pumping system wiring. Their IP65 certification protects against water and dust, ensuring dependability in outdoor agricultural settings.

• Transportation Systems

  In transportation systems such as railways and airports, SMC distribution boxes protect signalling, lighting and monitoring system wiring. Since they need to withstand extreme temperatures, strong winds, humidity and water, they house critical communication and control systems.

• Renewable Energy

  In renewable energy applications, such as solar panels and wind turbine systems, SMC distribution boxes are employed to protect the electrical wiring and system components. Their resistance to corrosion makes them suitable for outdoor applications that frequently experience weather exposure.

• Maritime and Offshore

  SMC distribution boxes are used in marine and offshore oil and gas platforms to protect electrical wiring in wet and salty environments. Their resistance to corrosion and high-impact strength ensures dependability in situations prone to severe weather.

Product specifications & features of SMC distribution boxes

Technical specifications

• IP Rating: Up to IP68 (for dust and water protection)
• Material: SMC (Sheet Moulding Compound) for reinforced plastic
• Operating temperature: -40 to +120°C
• UV resistance: Yes
• Colour: Grey, white or custom colours
• Mounting type: DIN rail or fixed mounting
• Window type: Transparent or opaque window

Key features

• Robust Construction: Due to the SMC's superior strength and rigidity, the distribution boxes can resist extreme weather, chemicals and mechanical stress.
• Lightweight: Being lightweight ensure easy installation without a big burden in handling.
• Corrosion resistance: Compared to metallic enclosures, SMC distribution boxes have excellent resistance to corrosion from moisture, acids and salts.
• Temperature resistance: SMC distribution boxes can be used under extreme temperatures due to their excellent thermal insulation properties.
• Electrical insulation: The electrical insulation property of SMC Distribution Boxes protects against electrical shock and reduces energy loss.
• IP Rating: The varied IP ratings of SMC distribution boxes range from IP54 to IP68 for dust and water protection.
• Maintenance Free: SMC distribution boxes are maintenance-free for a long period due to their long-lasting and robust nature.

How to install

Installation of SMC distribution boxes should be done carefully to ensure the protected electrical system works safely and effectively. First, choose a location that was an ideal place for installation in terms of accessibility and environmental conditions. The following section outlines the installation procedure for SMC distribution boxes.

• Prepare the mounting surface: The mounting surface should be cleaned to make a level base for mounting the distribution box. For the concrete or cinder block surfaces, use a chisel to ensure there are no protrusions that will affect the distribution box. For wooden surfaces, the box should be mounted on wooden frames or directly on the wood.
• Mounting the box: Most SMC distribution boxes have four holes at the four corners for mounting. Position the box in the desired location and secure it with screws or bolts. Use a level to ensure the box is straight.
• Wiring: After securely mounting the distribution box, the next step is to bring the electrical wiring through the knockouts. The wires should be stripped and connected to the circuit breakers, switches, or terminals according to the wiring diagram and the National Electrical Codes (NEC).
• Sealing: If the distribution box has a sealing gasket, place the gasket around the edge of the box opening to protect the wires and components from dust and moisture.

Maintenance and repair

SMC distribution boxes have a long lifespan and are virtually maintenance-free; however, to keep the SMC Distribution boxes working optimally, one has to understand the kind of conditions the boxes are in. Below is a brief guide on maintenance and repair for SMC distribution boxes.

• Visual inspection: The first step in maintenance is to periodically check the external condition of the SMC distribution boxes. Check for any visible cracks, faded SMC distribution boxes, or signs of damage. Check the seals to ensure they are in good condition for water and dust protection.
• Cleaning: Regular cleaning helps maintain the integrity of the distribution boxes. Use a damp cloth to wipe off dust, dirt or grime. In cases where corrosive substances are present, a suitable detergent with low concentration should be used to wash off the substances. However, avoid using abrasive materials that may scratch or weaken the SMC material.
• Fasteners: Inspect the fasteners, bolts, and screws and tighten any that are loose. Check for any signs of corrosion.
• Interior inspection: After removing the cover, check the state of the electrical components such as wires, circuit breakers and fuses. Ensure there are no loose connections and all components are in good working condition.
• Repair: For repairs, minor cracks or chips in the SMC material may be fixed using a compatible adhesive. However, in some extreme cases, the structural strength of SMC distribution boxes might be affected; the only solution is to replace the boxes. Also, faulty electrical components should be replaced with new ones.

Quality and safety checks of SMC distribution boxes

Quality checks

• Material Quality: SMC distribution boxes are usually made from Sheet Moulding Compound, which consists of glass-reinforced polyester (GRP). To check the quality of the material, one will look at how the manufacturer sources the raw materials. They should have enough fibre glass to add to the compound to enhance strength and toughness. Checking the grade of polyester is also important, as high-quality grades enhance resistance.

• Impact Resistance Tests: Under this test, the aim is to establish if the distribution box can withstand sudden and extreme blows. This check is usually performed using a dropping ball apparatus. The tougher the SMC moulding box is, the high-velocity it can withstand without cracking.

• Thermal Testing: Since SMC distribution boxes are intended to work under extreme temperatures, it's critical to verify the thermal properties of the box. Test its heat resistance by putting it in a temperature chamber and raising the temperature to +120 degrees celcius. Examine the distribution box to see if it has any deformed or weakened shape at this point.

• Corrosion Resistance Tests: This is particularly important when the SMC distribution boxes are frequently exposed to salty conditions such as marine areas. For this test, expose the box to harsh chemicals and moisture for some time. Check for early signs of weakness or deterioration. If there are none, then pass.

Safety checks

• IP Rating Verification: With the advent of the SMC distribution box, it is critical to verify its IP rating. SMC distribution boxes are certified to IP65 and IP68. This test is conducted by using a pressurised water bottle to examine if any water penetrates the box. No penetration means a pass.

• Electrical Insulation Checks: The main aim of these checks is to verify that the box can effectively insulate electrically from any current flow. Use a megger to test the insulation resistance between the box and any conductor. To pass, the resistance must measure at least 1 megohm per meter of box surface or more than 100 megohms.

• Load Testing: In assessing its electrical system safety and dependability, the SMC distribution box is subjected to electrical load within the limits of the designed capacity. During this time, monitor the temperature and watch out for any abnormalities such as overheating of wires or tripping of circuit breakers.

• Grounding and Bonding Checks: Grounding and bonding are critical components of electrical safety. Inspect the grounding terminal in the SMC distribution box to ensure the bonded conductors are rightly tied to the ground. Using a multimeter, check for conductivity between the ground terminal and the distribution box.

Q&A

Q1: What are SMC distribution boxes used for?

A1: SMC distribution boxes are utility and electrical equipment safety enclosures for protection against dust, water and electrical hazards. Their lightweight, corrosionproof and robust features make them suitable in industrial, telecommunication, transportation and renewable energy applications.

Q2: What is the IP rating of SMC distribution boxes?

A2: The IP rating of SMC distribution boxes usually varies from IP65 for dust and water protection to IP68 for prolonged submersion in water, depending on the specific box and usage conditions.

Q3: Do SMC distribution boxes require grounding?

A3: Yes, they must be grounded for safety. Grounding helps prevent electrical shock and protects the electrical components from power surges. It gives a conductive path for the excess electrical energy to the ground.

Q4: How long do SMC distribution boxes last?

A4: An SMC distribution box typically lasts 30 to 40 years. However, its lifespan will also significantly depend on the environmental conditions it has been exposed to.

Q5: Can SMC distribution boxes be used outdoors?

A5: Yes, SMC distribution boxes can be used outdoors. They are constructed using glass-reinforced polymers that provide excellent protection against UV rays, water and dust to outdoor environments.