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nVent MB252503PCK - MultiBox Opaque Screw Cover with Knockouts Type 4X, 2.55x2.55x3.18, Lt Gray, Polycarbonate, PCK

nVent MB252503PCK MultiBox Opaque Screw Cover with Knockouts Type 4X, 2.55x2.55x3.18, Lt Gray…

UPC: 635394601177

Documents & Media
Installation Instructions

Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The nVent MultiBox Opaque Screw Cover with Knockouts (SKU: MB252503PCK) is a high-performance enclosure accessory designed to protect electrical junctions and instrumentation in demanding industrial environments. Manufactured by nVent, a global leader in electrical and thermal management solutions, this Type 4X rated cover ensures superior resistance to corrosion, moisture, dust, and other contaminants, making it ideal for highly corrosive or hazardous applications. Constructed from durable polycarbonate in a light gray finish, the MB252503PCK provides a robust barrier against environmental threats while maintaining visibility for inspection and maintenance. This MultiBox enclosure cover is engineered for seamless integration with nVent's MultiBox series of junction boxes and instrumentation enclosures, offering a secure, tamper-resistant closure for critical electrical connections. The integrated knockouts allow for flexible cable entry points, accommodating various conduit sizes and wiring configurations without compromising protection. With dimensions of 2.55 x 2.55 x 3.18 inches, this cover is compact yet spacious enough to house multiple connections, making it suitable for both small-scale control panels and larger industrial installations. Industries that rely on the nVent MultiBox Opaque Screw Cover include oil and gas, chemical processing, water and wastewater treatment, manufacturing, and renewable energy. In these sectors, equipment must withstand extreme conditions, including exposure to chemicals, high humidity, and temperature fluctuations. The Type 4X rating confirms compliance with stringent NEMA and IP standards, ensuring reliable performance in both indoor and outdoor settings. Professionals in these fields trust nVent for its commitment to innovation, durability, and safety, as evidenced by decades of expertise in electrical protection solutions. Installation is straightforward, thanks to the screw-mounted design, which provides a secure seal without the need for specialized tools. The polycarbonate material offers excellent impact resistance, reducing the risk of damage during handling or in high-vibration environments. Additionally, the light gray color enhances visibility in low-light conditions, making it easier to inspect connections and perform routine maintenance. For engineers and technicians seeking a dependable, long-lasting solution for junction box protection, the nVent MultiBox Opaque Screw Cover with Knockouts is a top-tier choice. nVent’s reputation for quality is built on rigorous testing and adherence to global standards, ensuring that products like the MB252503PCK deliver consistent performance in the most challenging conditions. Whether used in a coastal refinery, a pharmaceutical plant, or a remote solar farm, this enclosure cover provides peace of mind by safeguarding critical electrical components from the elements. Choose nVent for uncompromising protection and reliability in your next project.
  • Type 4X rated for superior protection against corrosion, moisture, and dust
  • Durable polycarbonate construction with light gray finish for visibility
  • Integrated knockouts for flexible cable entry and conduit routing
  • Compact 2.55 x 2.55 x 3.18 inch dimensions for versatile applications
  • Screw-mounted design for secure, tamper-resistant enclosure closure
  • Continuous gaskets made of polyurethane foam guarantee optimal integrity
  • All enclosures can be easily modified to customer specifications

Specifications

Application
Controls and Drives; Corrosive Environments
Color
Light Gray
Finish
Smooth Matte
Material
Polycarbonate
Type
Fiberglass and Thermoplastic Wall Mounted Industrial Enclosures
Panel 6.9 x 4.9 - Fits Encl. 8 x 6 - Alum

14A0705

Panel 6.9 x 4.9 - Fits Encl. 8 x 6 - Alum
Sealable and transparent protective covers BX4 and non-removable BX4-CA to protect the devices against accidental contact.

BX4

Sealable and transparent protective covers BX4 and non-removable BX4-CA to protect the devices against accidental contact.
Cord Grip with NPT Threads, Locknut Included, NPT Thread Size 3/8 Inch, Cable Range 0.181 Inch/4.6mm to 0.312 Inch/7.9mm, Hole Clearance 0.670 Inch/17.0mm, Thread Length 0.53 Inch/13.5mm, IP68 Rating, Nylon, Black

LH38

Cord Grip with NPT Threads, Locknut Included, NPT Thread Size 3/8 Inch, Cable Range 0.181 Inch/4.6mm to 0.312 Inch/7.9mm, Hole Clearance 0.670 Inch/17.0mm, Thread Length 0.53 Inch/13.5mm, IP68 Rating, Nylon, Black
EP-RJG-M20-BL-A

1SNG618003R0000

EP-RJG-M20-BL-A
1/2 Inch, Straight, One-Piece Liquidtight Non-Metallic Fitting, CSA, UL E32447, Temperatures up to 60 Degrees C, PVC, Grey

LN43DA

1/2 Inch, Straight, One-Piece Liquidtight Non-Metallic Fitting, CSA, UL E32447, Temperatures up to 60 Degrees C, PVC, Grey
1/2 Inch, 90 Degree, Two-Piece Liquidtight Non-Metallic Fitting, UL E32447, Temperatures up to 107 Degrees C, Nitril Rubber O-Ring, PVC, Grey

LT20D-NEW

1/2 Inch, 90 Degree, Two-Piece Liquidtight Non-Metallic Fitting, UL E32447, Temperatures up to 107 Degrees C, Nitril Rubber O-Ring, PVC, Grey
External operation handle 0-1 type S01 Red Nema 4,4x

140E2911

External operation handle 0-1 type S01 Red Nema 4,4x
Locking using CASTELL K key operated lock (not supplied) Fuserbloc Sirco

36297702

Locking using CASTELL K key operated lock (not supplied) Fuserbloc Sirco
12,80" x 12,80" filter fan - 115Vac - 285.3 cfm - RAL 7035 - Type 12

FF20A115UE1

12,80" x 12,80" filter fan - 115Vac - 285.3 cfm - RAL 7035 - Type 12
5,90" x 5,90" filter fan - 24Vdc - 20.6 cfm - RAL 9005 - Type 3R - IP55

FF12D24NN53

5,90" x 5,90" filter fan - 24Vdc - 20.6 cfm - RAL 9005 - Type 3R - IP55

How to Install the MB252503PCK Multibox Enclosure

Installation guide for mounting and wiring the MB252503PCK Multibox series enclosure.

Estimated time: 30m

Tools needed:

Screwdriver, Drill (if mounting holes are needed), Wire strippers, Pliers

Supplies needed:

Mounting screws, Wire connectors, Gasket (if not pre-installed), Cable glands (if needed)

  1. Select Mounting Location

    Choose a suitable location for the MB252503PCK enclosure. Ensure the environment is appropriate for the enclosure's NEMA/IP rating and temperature range. Refer to the datasheet for specific environmental considerations.

  2. Prepare the Enclosure

    If using an enclosure with knockouts (e.g., PCK, PSK, PCCTK, PSCTK series), select the appropriate knockout locations for cable entry. Remove knockouts using pliers or a suitable tool. If no knockouts are present, plan for drilling mounting holes. For enclosures without knockouts, drill mounting holes as needed, ensuring they do not compromise the enclosure's integrity or gasket seal.

  3. Mount the Enclosure

    Securely mount the MB252503PCK enclosure to the desired surface using appropriate mounting screws. Ensure the enclosure is level and firmly attached. If using a back plate, mount it first according to its specific instructions.

  4. Install Cable Glands (if applicable)

    If using cable glands, install them into the prepared knockout holes or drilled openings. Ensure a tight seal to maintain the enclosure's environmental rating.

  5. Route Wiring

    Feed the necessary electrical wires through the installed cable glands or openings into the enclosure. Ensure proper strain relief is applied to the cables.

  6. Make Electrical Connections

    Connect the internal wiring according to your system's requirements. Use appropriate wire connectors and ensure all connections are secure and insulated. Refer to any internal diagrams or external datasheets for specific wiring configurations.

  7. Close and Secure the Enclosure

    Carefully close the enclosure cover, ensuring the gasket is properly seated to maintain a watertight and dust-tight seal. Secure the cover using the provided non-metallic corner screws. Tighten screws evenly.

  8. Final Inspection

    Visually inspect the installed enclosure to ensure all seals are intact and all connections are secure. Verify that the enclosure is properly mounted and all openings are sealed.

Frequently Asked Questions about nVent

What industries and applications are nVent products used for?

nVent products are engineered for critical infrastructure and industrial applications across multiple demanding sectors. Key markets include Construction, Data Centers, Defense, Healthcare, Mining, Oil & Gas Refineries, Power Plants, Rail/Transit, Renewable Energy, Security, Ship Building, Steel Mills, Telecom, and Utilities. Their solutions are designed to withstand extreme environmental conditions, with temperature ranges from -55°C to 105°C and specialized features like UV resistance, oil resistance, and flame resistance.

What environmental ratings do nVent products have?

nVent enclosures feature comprehensive environmental ratings, including UL 508A, CSA, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13 certifications. They are rated IEC 60529 IP66, providing robust protection against dust, water, and corrosion in both indoor and outdoor environments. These products operate effectively in temperatures ranging from -40°F to 266°F, with enhanced UV inhibitors for outdoor weathering and oil-resistant gaskets for superior sealing.

What accessories are available for nVent products?

nVent offers a comprehensive range of accessories across multiple product lines, including EMC accessories like bonding cable clamps and strain reliefs, inline accessories such as lock inserts and mounting brackets, CONCEPT accessories including panel conversion kits and rack-mount angles, and seismic accessories for specialized mounting requirements. Key accessory categories include grounding kits, DIN rail mounting solutions, panel supports, handles, and various mounting hardware compatible with different enclosure types.

What certifications and standards do nVent products comply with?

nVent products meet critical international certifications including UL (United States), CSA (Canada), CE (European Community), and EAC (Russia). Our products are designed to comply with rigorous industrial standards such as NEMA enclosure ratings, IEC 60529 IP ratings, and international safety standards across multiple industrial markets including oil & gas, power, manufacturing, and infrastructure.

What is nVent's warranty policy?

nVent offers a standard 18-month warranty from invoicing date for most automation products, covering defects in workmanship and materials. The warranty requires proper transportation, handling, storage, and installation within specified environmental conditions. Warranty coverage includes repair or replacement at nVent's discretion, with certain conditions such as authorized service repairs and operation within designed capacity limits.

What technical support does nVent offer?

nVent offers comprehensive technical support through multiple global contact centers across North America, South America, Europe, Middle East, India, and Asia. Customers can reach technical experts by phone at regional numbers, with the North American headquarters in Minneapolis, MN providing primary support at +1.763.421.2240. Additionally, nVent provides online support resources through their website, including CAD drawing downloads and an 'Ask The Expert' feature to assist with product technical inquiries.