Eaton 3331PW Watertight locking plug - NEMA 4X/IP67
Part Number: 3331PW
Quick Summary
The Eaton 3331PW watertight locking plug is designed for industrial power connections in harsh environments, delivering secure back-wired terminations for 30A circuits. Maintenance teams often contend with moisture ingress, corrosion, and downtime when connectors fail in washdown areas or outdoor installations. This model carries cULus Listed certification and is rated IP67 and NEMA 4X, with NEMA 6P and 6 variants for rugged protection in wet, dusty, and washdown environments. Designed for industrial plug-and-socket applications, it supports 125/250V and back-wire installation, offering a reliable, safety-conscious solution that reduces maintenance time and improves uptime across manufacturing, processing, and automation settings.
Product Information
Extended Description
3331PW Eaton: Eaton Arrow Hart watertight locking plug, #18-10 AWG, 30A, Industrial, 125/250V, Back wiring, Yellow, 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
3331PW
UPC
040893641980
Product Length/Depth
6.8 in
Product Height
3.88 in
Product Width
4.39 in
Product Weight
0.97 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 4X IP67 NEMA 6P NEMA 4 NEMA 6
Allowable wire size
#18-10 AWG
Wiring method
Back
Color
Yellow
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
Watertight protection with IP67 and NEMA 4X ratings minimizes moisture and dust ingress, translating to fewer field failures and lower maintenance costs in washdown and outdoor locations. The business impact is measurable: longer service life, lower replacement frequency, and greater system reliability in critical production lines. Application contexts include industrial panels, machinery, and portable equipment where rugged environmental exposure is expected. The yellow nylon body and nickel-plated brass contacts enhance durability and corrosion resistance, supporting consistent electrical contact over time and reducing contact resistance variability in demanding environments. The back wiring method accepts #18-10 AWG conductors, enabling faster terminations, simpler field servicing, and reduced labor costs during installation and retrofits. This three-pole, non-grounding design streamlines wiring in equipment that does not require a ground conductor, improving installation efficiency and safety. The device’s Santoprene elastomeric seal and watertight features address high-dust or washdown workflows, delivering reliable performance with minimal maintenance. A back-wired, extra-heavy-duty industrial specification grade assembly ensures compatibility with high-cycle applications, while the visible color coding aids quick identification on crowded panels, minimizing mis-wiring risk during setup or repairs.
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FAQs
The 3331PW supports back wiring for #18-10 AWG conductors, enabling clean, secure terminations inside panels or enclosures. Ensure power is disconnected before installation, strip adequate conductor insulation, and insert conductors into the back-wiring terminals per the product diagram. Tighten to the manufacturer’s torque specification, verify polarity for three-pole operation, and perform a continuity check after mating with the companion receptacle to confirm a solid, low-resistance connection. This method reduces field termination time and improves reliability for high-availability industrial systems.
The 3331PW is rated for 30A, 125/250V, with three poles and non-grounding three-wire configuration. It carries cULus listing and environmental protections including IP67 and NEMA 4X (with NEMA 6P and 6 variants). These specifications translate to robust resistance against moisture, dust, and washdown exposure, making it suitable for harsh industrial settings such as manufacturing floors, outdoors, and equipment subjected to frequent cleaning.
Yes. The combination of IP67 and NEMA 4X ratings, along with watertight construction and Santoprene seal material, makes the 3331PW well-suited for outdoor installations and washdown-heavy environments. Its yellow, high-visibility body aids in rapid identification in cluttered spaces, while the back-wiring capability and extra-heavy-duty construction support reliable performance on mobile equipment and in fixed outdoor applications.
The 3331PW is cULus Listed, confirming compliance with recognized safety standards for electrical devices. Its IP67 and NEMA 4X ratings indicate strong protection against water, dust, and washdowns, while NEMA 6P and 6 variants extend protection for more demanding environments. These certifications reduce compliance risk for end users in regulated industries and support safer, longer-lasting installations across industrial facilities.
Expect lower maintenance costs due to reduced moisture-related failures and longer seal life from the watertight design. The back-wiring capability speeds field terminations, cutting labor costs during installations and retrofits. The rugged construction, corrosion-resistant contacts, and high environmental ratings translate to improved uptime, fewer part replacements, and overall return on investment from extended service life and safer, faster service in demanding industrial environments.