nVent MB141004PC - MultiBox Opaque Screw Cover Type 4X, 14.21x10.00x4.37, Lt Gray, Polycarbonate, PC
nVent

MB141004PC

UPC: 635394600958

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Installation Instructions

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Overview

The nVent MultiBox Opaque Screw Cover (SKU: MB141004PC) is a high-performance electrical junction box designed for extreme environmental protection in industrial and commercial applications. Engineered with Type 4X NEMA-rated polycarbonate construction, this enclosure delivers unmatched resistance to corrosion, moisture, dust, and chemical exposure, making it ideal for harsh operating conditions where reliability is critical. The lightweight yet durable design combines impact resistance with UV stability, ensuring long-term performance in outdoor and indoor installations alike. Manufactured by nVent, a global leader in electrical and thermal management solutions, the MultiBox series is trusted by engineers and contractors across industries including oil & gas, chemical processing, water treatment, food & beverage, and renewable energy. The opaque screw cover design provides an added layer of protection against UV degradation and visual inspection requirements, while the light gray finish offers low heat absorption in high-temperature environments. Key applications include: • Electrical junction and termination points in corrosive atmospheres • Instrumentation and control panel enclosures for process industries • Hazardous location protection where NEMA Type 4X compliance is required • Outdoor electrical installations requiring IP66/IP67 ingress protection • Marine and coastal environments with high salt spray exposure The MultiBox enclosure’s 14.21 x 10.00 x 4.37 inch dimensions provide ample internal space for wire terminations, terminal blocks, or small control components, while the screw cover design ensures secure sealing without the need for specialized tools. Installation is simplified through multiple knockouts (typically 3/4" or 1/2" trade sizes) on the sides and bottom, allowing for flexible cable entry configurations. The polycarbonate material offers superior dielectric strength and flame resistance, meeting UL 94 V-0 and CSA certification standards for safety and performance. Professionals select nVent MultiBox enclosures for their proven track record in demanding environments, where standard metal or plastic enclosures fail due to corrosion or mechanical stress. The Type 4X rating ensures protection against hose-directed water and corrosion from external sources, making these enclosures a preferred choice for facilities requiring minimal maintenance and maximum uptime. With a Canadian origin and global distribution network, nVent provides comprehensive technical support, including CAD drawings, installation guides, and compliance documentation to streamline project planning and execution. For engineers specifying enclosures for corrosive or high-exposure applications, the nVent MultiBox Opaque Screw Cover (MB141004PC) delivers a cost-effective, long-lasting solution that reduces downtime and maintenance costs while ensuring compliance with international safety standards.
  • Type 4X NEMA-rated for superior protection against corrosion, moisture, and dust
  • Polycarbonate construction offers high impact resistance and UV stability
  • 14.21 x 10.00 x 4.37 inch dimensions with ample internal space for components
  • Opaque screw cover design prevents UV degradation and visual inspection requirements
  • Manufactured by nVent, a trusted leader in electrical enclosure solutions
  • All enclosures can be easily modified to customer specifications

Specifications

Application
Corrosive Environments; Controls and Drives
Color
Light Gray
Finish
Smooth Matte
Ip Rating
IP66/IP67
Material
Polycarbonate
Nema Rating
Type 4X
Series
MultiBox
Size
14.21x10.00x4.37 in
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.
Escutcheon black type B for Sircover 125-630A

44095015

Escutcheon black type B for Sircover 125-630A
Escutcheon black type B for Sircover 125-630A IP65

44095016

Escutcheon black type B for Sircover 125-630A IP65
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
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
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
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
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

How to Install the MB070465PCCT Enclosure

This guide provides step-by-step instructions for installing and configuring the MB070465PCCT enclosure for electrical junctions in corrosive environments.

Estimated time: 45m

Tools needed:

Screwdriver, Wire strippers, Multimeter

Supplies needed:

Mounting screws, Terminal connectors

  1. Mount the enclosure

    Secure the MB070465PCCT enclosure to a suitable surface using the provided mounting screws. Ensure it is level and firmly attached.

  2. Connect the wiring

    Strip the ends of the wires and connect them to the terminal connectors inside the enclosure. Ensure all connections are tight and secure to prevent any electrical faults.

  3. Verify the installation

    Use a multimeter to check the continuity of the connections and ensure there are no short circuits. Confirm that the enclosure is properly sealed and ready for use.

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.