Finding a reliable 50 amp, 3-phase twist lock receptacle is essential for heavy-duty industrial settings, job sites, and backup power systems. The following selections highlight rugged construction, UL approvals, and secure locking mechanisms designed to resist harsh environments. This guide compares top options from respected brands, helping you choose the right compatibility, voltage, and wiring for your needs.
| Product | Brand | Voltage / Phase | Type | Key Feature |
|---|---|---|---|---|
| Hubbell CS8369 Locking Receptacle | Hubbell | 250V, 3 Phase | 3 Pole 4 Wire | Heavy-Duty Industrial, UL 498 |
| Marinco CS6369 50A Twist Lock Receptacle | Marinco | 125/250V, 3 Phase | 3 Pole 4 Wire | Glass-filled nylon body, standard FD box mounting |
| Hubbell CS6369L Locking Receptacle | Hubbell | 125/250V, 3 Phase | 3 Pole 4 Wire | Industrial grade, metallic color |
| Marinco CS8169 50A 3 Phase Receptacle | Marinco | 480V, 3 Phase | 3P4W | Nylon construction, Perma-lock terminals |
| Hubbell CS8365L Locking Receptacle | Hubbell | 250V, 3 Phase | 3 Pole 4 Wire | Heavy Duty Industrial, UL 498 |
Hubbell CS8369 Locking Receptacle
The Hubbell CS8369 is a 50 amp, 250V locking receptacle designed for industrial environments. It supports 3 poles with 4 wires and carries UL 498 approval. Its black finish emphasizes durability and resistance to wear, making it suitable for demanding applications where secure, weather-resistant connections are essential.
Marinco CS6369 50A Twist Lock Receptacle
The Marinco CS6369 features a glass-filled nylon body for impact, heat, and chemical resistance. It mounts easily in a standard FD box, enhancing installation flexibility. A heavy-duty brass mounting strap and ground system provide a robust grounding path and corrosion resistance, making it ideal for professional electrical work in challenging environments.
Hubbell CS6369L Locking Receptacle
This Hubbell CS6369L is designed for industrial-grade applications with 125/250V capability. It features a 3-pole, 4-wire configuration and metallic color for added ruggedness. UL 498 compliance ensures dependable performance in harsh environments where secure connection is critical.
Marinco CS8169 50A 3 Phase Receptacle
The Marinco CS8169 is rated for 50A at 480V, 3P4W. Its nylon construction provides broad chemical resistance, while Perma-lock terminals deliver secure connections. Ten solid brass components contribute to excellent conductivity and long-term reliability in industrial use cases.
Hubbell CS8365L Locking Receptacle
The Hubbell CS8365L offers a 50 amp, 3-phase solution with 3 poles and 4 wires. Built for heavy-duty industrial applications, it adheres to UL 498 and features a durable black finish, ensuring resilient performance in tough settings where secure power connections are essential.
Hubbell CS6365C Locking Plug
The Hubbell CS6365C provides 3P4W connectivity with 125/250V ratings and a rugged black/white finish. It is designed for extra heavy-duty industrial use and UL 498 compliance, offering reliable service in demanding electrical environments.
Hubbell HBL7765C Locking Plug
The HBL7765C is a 3P4W locking plug rated for 50A at 250VDC/600VAC. It features extra heavy-duty industrial construction with UL 498 compliance. Its black/white color scheme supports visibility and reliability in industrial installations.
Buying Guide: Key Purchase Considerations
- Voltage and configuration: Ensure the receptacle matches your system voltage (125/250V or 250V) and phase requirements (3P4W for 3-phase). Confirm compatibility with the equipment plugs you use.
- Environmental durability: Look for UL 498 listings, resin or nylon housings, and corrosion-resistant finishes to withstand harsh sites and outdoor use.
- Grounding and safety: A robust ground path and secure mounting strap are essential for reducing electrical resistance and improving safety in heavy-duty applications.
- Mounting style: Choose units designed for standard FD boxes or other common enclosures to simplify installation and maintenance.
- Material and construction: Glass-filled nylon and brass components can offer better impact resistance and conductivity, important for long-term reliability.
- Product family compatibility: If you already use Hubbell or Marinco products, staying within a brand family can simplify replacements and spare parts.
- Locking mechanism: A secure twist-lock design reduces the risk of accidental disconnections in high-vibration environments such as mobile generators or industrial equipment.
- Availability of accessories: Check for compatible plugs, cords, and mounting hardware to complete a full system install.
In choosing between these models, consider the exact voltage, phase, enclosure type, and the environmental conditions where the receptacle will operate. The listed options provide a range of materials, mounting styles, and ratings that accommodate most heavy-duty industrial needs without compromising safety or performance.