Eaton Crouse-Hinds NJB040903 NJB junction box - NEMA 3 4X 12
Part Number: NJB040903
Manufacturer
Eaton Crouse-Hinds
Part number
NJB040903
Quick Summary
NJB040903 junction box is a rugged nonmetallic enclosure designed for control panels and field installations in industrial facilities. It addresses common challenges like moisture ingress, chemical exposure, and wiring clutter by delivering a compact, durable housing that fits tight spaces. This unit carries a NEMA rating of 3 4X 12, is suitable for Ordinary/Non-Hazardous Locations, and adheres to NEC/CEC standards for reliable performance. The Krydon fiberglass-reinforced polyester construction, 3/4 in hub capacity, and a 3-1/4 x 9 x 2-3/4 in footprint translate to installation efficiency, reduced maintenance, and long-term cost savings for panel builders and maintenance teams.
Product Information
Extended Description
NJB040903 Eaton Crouse-Hinds: Eaton Crouse-Hinds series NJB junction box, 3-1/4 x 9 x 2-3/4" enclosure size, Basic enclosure, Krydon fiberglass-reinforced polyester, 3/4" long sides, 3/4" short sides
Product Name
Eaton Crouse-Hinds series NJB junction box
Catalog Number
NJB040903
UPC
782274088020
Product Length/Depth
3.25 in
Product Height
9 in
Product Width
2.75 in
Product Weight
1.75 lb
Area classification
Ordinary/Non-Hazardous Locations
Standards type
NEC/CEC
NEMA Rating
3 4X 12
Enclosure type
Basic Enclosure
Enclosure size
3-1/4 x 9 x 2-3/4"
Hub size - max
3/4 in long sides, 3/4 in short sides
Material
Krydon fiberglass-reinforced polyester
Crouse-Hinds series NJB and NC Nonmetallic Junction Boxes and Control Enclosures catalog page
IF 388 - NJB, NCS Krydon Enclosures
Eaton Specification Sheet - NJB040903
Feature: Krydon fiberglass-reinforced polyester enclosure material. Business Impact: Provides superior chemical resistance and impact durability, extending service life in challenging environments. Application: Ideal for control panels in nonhazardous industrial settings where exposure to moisture and chemicals is common. Feature: NEMA Rating 3 4X 12. Business Impact: Ensures weather, dust, and corrosion resistance, delivering compliant performance in both indoor and outdoor installations. Application: Suitable for ordinary locations and selective outdoor applications in dry-to-wet conditions. Feature: Hub size - max 3/4 in on long and short sides. Business Impact: Enables flexible and neat cable entries, reducing labor during terminal block wiring and field terminations. Application: Supports standardized wiring schemes in compact enclosures. Feature: Enclosure size 3-1/4 x 9 x 2-3/4 in with basic enclosure design. Business Impact: Compact footprint minimizes space in control cabinets while maintaining adequate internal space for components. Application: Fits compact control panels and utility enclosures with straightforward installation. Feature: NEC/CEC compliance and specified area classification. Business Impact: Simplifies regulatory approvals and reduces project risk, aiding procurement and commissioning. Application: Meets electrical code requirements for ordinary locations in industrial facilities.
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FAQs
Yes. NJB040903 features a compact 3-1/4 x 9 x 2-3/4 in footprint with standard nonmetallic construction and 3/4 in hubs on both long and short sides. Its basic enclosure design simplifies drop-in replacements and retrofits, while Krydon material allows clean cable routing and robust mounting in standard electrical frames, reducing commissioning time and field adjustments.
Key specs include a NEMA rating of 3 4X 12, area classification Ordinary/Non-Hazardous Locations, and NEC/CEC compliance. The enclosure is made from Krydon fiberglass-reinforced polyester and measures 3-1/4 x 9 x 2-3/4 inches with a 3/4 inch hub capacity, weighing about 1.75 lb. These factors together support durable performance in typical industrial environments.
The NEMA 3 and 4X ratings provide protection against weather and corrosion, making NJB040903 suitable for ordinary locations with occasional exposure to moisture or dust and some outdoor applications. Its Krydon material further enhances chemical resistance, making it a dependable choice for nonhazardous outdoor installations and protected indoor areas.
NJB040903 complies with NEC/CEC standards and carries NEMA ratings 3, 4X, and 12. It is classified for Ordinary/Non-Hazardous Locations, aligning with typical electrical installation codes for nonhazardous environments. These certifications support smoother procurement, installation, and ongoing regulatory compliance in industrial facilities.
The Krydon material and multi-faceted NEMA protection reduce corrosion-related failures and seal integrity concerns, lowering maintenance intervals and replacement costs. Its compact size streamlines wiring and terminal access, potentially reducing labor hours during initial installation and future upgrades, while meeting NEC/CEC requirements to minimize project risk.