nVent ASG18X12X4NK - Screw-Cover Enclosure Type 1 no Knockouts, 18x12x4, Galvanized, Steel
nVent

ASG18X12X4NK

UPC: 783510863807

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Overview

The **nVent Screw-Cover Enclosure Type 1 (SKU: ASG18X12X4NK)** is a premium galvanized steel junction or pull box designed for commercial and general industrial applications requiring robust, code-compliant electrical protection. Engineered with a screw-cover design, this enclosure provides secure access to wiring while maintaining Type 1 integrity against dust, dirt, and incidental contact. The **18x12x4-inch dimensions** offer ample internal space for routing, splicing, and terminating conductors, making it ideal for pull boxes, junction boxes, or splice enclosures in demanding environments. **Key Applications & Industry Use Cases** This enclosure is widely specified in commercial buildings, manufacturing facilities, data centers, healthcare campuses, and institutional settings where reliable electrical distribution and protection are critical. Common applications include: - **Junction boxes** for connecting branch circuits in conduit systems - **Pull boxes** to facilitate wire pulling in long conduit runs (e.g., between floors or across large facilities) - **Splice enclosures** for terminating and protecting cable splices in exposed or semi-exposed locations - **Control panel backboxes** for housing relays, timers, or other control components - **Outdoor or damp-location installations** where galvanized steel provides corrosion resistance **Construction & Durability** Constructed from **galvanized steel**, the ASG18X12X4NK resists rust, corrosion, and mechanical damage, ensuring long-term performance in harsh or high-traffic environments. The **screw-cover design** allows for tool-free access while preventing unauthorized tampering—a critical feature in public or high-security areas. Unlike Type 3R enclosures, this Type 1-rated box is not designed for outdoor weatherproofing but excels in indoor or protected outdoor applications where ingress protection (IP20) is sufficient. **Installation & Compatibility** The **no-knockout (NK) configuration** provides a clean, unobstructed interior, allowing installers to customize entry points using field-drilled holes or nVent’s compatible knockouts and gland plates. This flexibility simplifies integration with EMT, IMC, rigid metal conduit, or PVC conduit systems. For flush-mounted installations, nVent offers compatible **surface-mounted accessories** and **extension rings** to adapt the enclosure to specific wall depths or wiring requirements. **Why Specify nVent for Electrical Enclosures?** As a trusted leader in electrical infrastructure solutions, nVent delivers enclosures that meet or exceed **UL 50, UL 50E, and NEMA Type 1 standards**, ensuring compliance with NEC (National Electrical Code) and OSHA safety regulations. The **ASG18X12X4NK** is part of nVent’s comprehensive line of pull boxes and junction enclosures, which are engineered for durability, ease of installation, and long-term reliability. With a global reputation for innovation and quality, nVent’s products are specified by electrical contractors, engineers, and facility managers who demand performance without compromise. **Accessories & Customization** To enhance functionality, nVent offers a range of accessories for the ASG18X12X4NK, including: - **Mounting brackets** for secure wall attachment - **Weatherproof covers** for temporary outdoor use - **Dividers and barriers** to organize internal wiring - **Gasketed lids** for improved dust resistance - **Tamper-resistant screws** for added security **Selection Considerations** When choosing a pull box or junction enclosure, professionals prioritize **size, material, and ingress protection**. The **18x12x4-inch dimensions** provide a balance between compact footprint and internal capacity, while the **galvanized finish** ensures corrosion resistance in humid or chemically aggressive environments. For projects requiring additional protection, consider painted enclosures (Type 3R) or stainless steel variants for extreme conditions. Always verify local electrical codes (e.g., NEC Article 314) to ensure proper sizing and installation methods. **Long-Term Value & ROI** Investing in a high-quality enclosure like the nVent ASG18X12X4NK reduces maintenance costs, minimizes downtime from electrical failures, and ensures compliance with evolving safety standards. Its **modular design** allows for future expansions or reconfigurations, making it a cost-effective choice for both new construction and retrofit projects. Whether used in a commercial office building, industrial plant, or educational facility, this enclosure delivers the performance and reliability that electrical professionals demand.
  • Unique keyhole screw slots in the cover
  • Available with or without knockouts
  • Various sizes of easy-to-remove concentric knockouts on all four sides of standard boxes with knockouts
  • Optional flush-mounted door frame available
  • Optional flush covers
  • Flat, removable covers fastened with plated steel screws
  • Provision for grounding
  • Mounting holes on back of box
  • Enclosures are finished with paint over plated surfaces

Specifications

Application
Power Distribution
Body Thickness
16 ga
Color
Unpainted
Color Code
ANSI 61
Cover Screw Quantity
4
Depth
13 IN
Depth
4 in
Depth, Maximum
4
Depth, Minimum
4
Door Thickness
14 ga
Door Thickness
16 ga
Finish
Galvanized
Height
18 IN
Height
44 IN
IP Rating
IP30
IP Rating
IP20
Knockouts Included
No
Material
Mild Steel;Steel
Material
Galvanized Steel
Material
Steel
Modification Services
Yes
NEMA Rating
1
NEMA Rating
Type 1
Protection Rating
NEMA Type 1
Size
18x12x4 inches
Size
18.00x12.00x4.00 in
Style
Galvanized
Type
Pull and Junction Boxes
Type
Screw-Cover Pull Boxes Type 1/Type3
Type Number
Type 1
Weight
13 lb
Width
305 mm
Width
12 IN
Package Dimensions (L x W x H)
18 IN x 12 IN x 4.13 IN
Package Dimensions (L x W x H)
45.72 cm x 30.48 cm x 10.4902 cm
Package Weight (Imperial)
13.000 L
Package Weight (Metric)
5.897 kg
Screw-Cover Enclosure Type 1 with Knockouts, 18x12x4, Galvanized, Steel

ASG18X12X4

Screw-Cover Enclosure Type 1 with Knockouts, 18x12x4, Galvanized, Steel
NEMA 1 Enclosures are available with 3 fronts. The blank end walls are standard, and knockouts are available optionally.

AB55B

NEMA 1 Enclosures are available with 3 fronts. The blank end walls are standard, and knockouts are available optionally.

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.