Eaton 3331PWBK Watertight Locking Plug - cULus Listed
Part Number: 3331PWBK
Quick Summary
Eaton 3331PWBK watertight locking plug provides a rugged, back-wired connection for industrial enclosures and equipment. This solution addresses the common field challenge of moisture ingress and accidental unplugging in washdown environments. It carries a cULus listing and combines IP67/NEMA 4X-rated protection for reliable operation in harsh conditions. With a 30 A, 125/250 V rating and support for #18-10 AWG conductors, it enables safe, code-compliant installations across manufacturing, packaging, and processing facilities. The durable nylon body, nickel-plated brass contacts, and Santoprene elastomeric seal deliver long-term durability while simplifying maintenance and field replacement.
Product Information
Extended Description
3331PWBK Eaton: Eaton Arrow Hart watertight locking plug, #18-10 AWG, 30A, Industrial, 125/250V, Back wiring, Black, Brass, Watertight, Non-NEMA, Three-pole, Three-wire, non-grounding, Santoprene thermoplastic elastomeric, 0.43 to 1.15 in
Product Name
Eaton Arrow Hart watertight locking plug
Catalog Number
3331PWBK
UPC
032664708466
Product Length/Depth
6.8 in
Product Height
3.88 in
Product Width
4.39 in
Product Weight
0.845 lb
Certifications
cULus Listed
Amperage Rating
30A
NEMA configuration
Non-NEMA
Number Of Poles
Three-pole
Number of wires
Non-grounding 3
Voltage rating
125/250 V
Environmental resistance
NEMA 4 NEMA 6P NEMA 6 IP67 NEMA 4X
Allowable wire size
#18-10 AWG
Wiring method
Back
Color
Black
Contact material
Nickel plated brass
Application
Industrial
Cord diameter
0.43-1.15 in
Design type
Watertight locking plug
Device grade
Extra heavy-duty industrial specification grade
Face/body material
Nylon
Material
Santoprene thermoplastic elastomeric
Special features
Watertight
Type
Locking plug
Feature: Watertight locking design provides a secure connection that resists accidental disconnection. Business Impact: Reduces downtime and rework in wet or dusty environments, improving overall equipment availability. Application: Ideal for washdown areas in industrial plants where reliable power connections are essential. Feature: Back wiring compatibility and broad wire range (#18-10 AWG). Business Impact: Speeds installation and reduces labor costs during panel wiring or field alterations. Application: Electrical assemblies in control panels and enclosures with tight installation schedules. Feature: 30 A, 125/250 V rating with three-pole, non-grounding configuration. Business Impact: Supports high-load equipment while maintaining compliant, non-grounded wiring where required. Application: Industrial motors, pumps, and sequencing devices in manufacturing lines. Feature: Durable materials — Nylon body, nickel-plated brass contacts, Santoprene seal. Business Impact: Delivers corrosion resistance and long service life in harsh environments, cutting maintenance expenses. Application: Outdoor or damp environments, chemical exposure zones, and food/beverage processing areas. Feature: Environmental protection with NEMA 4, 6, 6P, IP67, and NEMA 4X ratings. Business Impact: Ensures enclosure integrity and compliance with multiple safety standards, reducing warranty risk. Application: Wet, dusty, and washdown capable installations across industrial facilities. Feature: General suitability for industrial applications with extra-heavy-duty specification grade. Business Impact: Provides consistent performance under demanding duty cycles, lowering replacement and downtime costs. Application: Heavy industrial machinery, conveyor systems, and power distribution boards.
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FAQs
The 3331PWBK supports back wiring with conductor sizes #18 through #10 AWG. This enables straightforward field termination and reduces the need for stranded-to-solid adapters, streamlining installation in control panels and industrial enclosures.
Yes. The plug carries IP67, NEMA 4, and NEMA 4X protections, along with NEMA 6/6P ratings in its environmental spec, making it well-suited for washdown, dust, and moisture-prone areas without compromising performance.
This is a three-pole, three-wire, non-grounding locking plug rated at 30A and 125/250V. The configuration supports non-grounding configurations where required by the equipment, with nickel-plated brass contacts for reliable conductivity.
The plug is cULus Listed, providing recognized safety compliance for North American installations. Combined with its IP67 and NEMA 4X ratings, these certifications reassure installers and procurement teams about product reliability in challenging industrial environments.
Its durable Nylon body, Santoprene seal, and corrosion-resistant contacts reduce wear and seal failures, lowering maintenance frequency and replacement costs. The back-wiring design also shortens installation time, yielding tangible labor savings over typical field installations.