Hubbell HBL63CM69 50A 125/250V Marine Twist-Lock Receptacle Yellow
Hubbell HBL63CM69 50A 125/250V Marine Twist-Lock Receptacle Yellow — Product description
The Hubbell HBL63CM69 is the marine-grade 50-amp 125/250V Twist-Lock receptacle in the Hubbell Wiring Device-Kellems marine line. 3-pole 4-wire grounding configuration, screw terminal connections for solid or stranded conductors, galvanized hardware, yellow thermoplastic / composite body for visibility and corrosion resistance, and the iconic Hubbell Twist-Lock connector mechanism that mechanically locks the plug in place to prevent accidental disconnect under vibration or pull load. The right receptacle for marina pedestals, dock power outlets, and shore-power inlet replacement on boats with 50A 125/250V shore power service.</p>
The Hubbell HBL63CM69 (Hubbell part HBL63CM69) is the 50-amp 125/250V marine-grade Twist-Lock receptacle in Hubbell Wiring Device-Kellems' marine product line. It's the female socket half of the Hubbell 50A 125/250V shore power connection: 3-pole 4-wire grounding configuration, Twist-Lock locking ring that the plug rotates into for mechanical retention, marine-grade thermoplastic / composite body, galvanized hardware, screw terminal wiring connections. The right receptacle for marina shore-power pedestals, dock power outlets serving 50A 125/250V boats, and replacement of failed receptacles in any 50A 125/250V marine shore power install.
What 50A 125/250V means. The 50-amp 125/250V configuration is the larger of the two standard recreational marine shore-power voltages. Smaller boats (typically under 35 feet) use 30A 125V single-phase service. Larger boats (over 35 feet, especially anything with significant air conditioning, large inverter, multiple appliances, or 230V European-style equipment) use 50A 125/250V split-phase service. 50A 125/250V provides two separate 125V hot legs (giving you 250V across the legs for high-power equipment, or 125V from either leg to neutral for standard outlets). Total available power: 50A x 250V = 12,500 watts continuous, plenty for a fully-equipped 35-60 foot cruising boat.
Twist-Lock connector mechanism. The Twist-Lock design is Hubbell's locking connector that prevents accidental plug disconnect. Insert the plug, rotate clockwise about 30 degrees, and the connector pins lock mechanically into the receptacle's locking ring. The plug stays in place against pull load, vibration, and wind - all the conditions that pop a standard non-locking plug out of its receptacle. To disconnect, rotate counter-clockwise to release the lock and then pull the plug. The locking action is the difference between a connector that stays connected during a passing storm and one that pulls free, leaving the boat without shore power.
3-pole 4-wire grounding. The 3-pole 4-wire configuration means the receptacle has 3 current-carrying conductors (two 125V hot legs + 1 neutral) plus a separate 4th wire for safety ground. The grounding pin physically grounds the connected equipment's chassis through the boat's bonding system to prevent shock hazards. The 3+ground configuration is the marine standard for 50A 125/250V split-phase service.
Marine-grade thermoplastic body. The receptacle body is thermoplastic / composite material engineered for marine environments. Non-conductive (so no risk of secondary shock paths through the housing). Corrosion-resistant in the salt-air marine environment. UV-resistant against sun damage from years of outdoor exposure. Impact-resistant against the bumps and drops that typical outdoor marina equipment sees. The material is meaningfully different from the budget thermoplastic in non-marine receptacles.
Yellow color for visibility. The yellow housing is the marine industry standard for 50A 125/250V shore power receptacles. The bright color makes the receptacle easy to spot in low-light conditions, against complex marina pedestal hardware, and during emergency disconnect situations where someone needs to find and disconnect the plug fast. Most marina pedestals use yellow for the 50A receptacles and a different color (typically white or natural) for the 30A receptacles - color-coding helps boat operators quickly identify which receptacle matches their boat's shore power inlet.
Galvanized hardware. The mounting hardware (screws, retaining rings, etc.) is galvanized steel for corrosion resistance. Galvanizing isn't quite as corrosion-resistant as stainless steel, but it's significantly more cost-effective for the application and provides adequate service life when the receptacle is properly housed in a weather-protected enclosure (the typical marina pedestal install).
Screw terminal connections. The wire connections to the receptacle's internal contacts are screw terminals. Strip the wire, insert under the screw, tighten to spec torque. The screw terminals accept both solid and stranded conductors. Compared to push-in or quick-connect alternatives, screw terminals provide better long-term electrical contact (less risk of high-resistance connections that overheat and fail), they handle the larger gauge wires the 50A application uses, and they're field-serviceable if rewiring is needed later.
IP20 environmental rating. IP20 is the protection class for indoor dry locations or for outdoor locations where the receptacle is housed in a separate weatherproof enclosure (the typical marina pedestal install where the pedestal door provides the weather protection). IP20 protects against finger contact with live parts but does NOT protect against water ingress directly into the receptacle body. For installs without a weather-protective housing, this isn't the right receptacle - look at higher-IP-rated options instead. For typical marina pedestal installs with a hinged weatherproof door over the receptacle, IP20 is fine.
Non-NEMA configuration. The Hubbell 50A 125/250V Twist-Lock pin pattern is a Hubbell-specific configuration, not a NEMA standard. The pattern matches the standard Hubbell 50A 125/250V shore power plug used industry-wide on boats with 50A 125/250V shore power inlet. Compatible with all Hubbell 50A 125/250V plugs and the equivalent Marinco 50A 125/250V plugs (which use the same pin pattern even though they're a different brand).
What this is for. Marina pedestal installation as the receptacle that boats plug into. Dock power outlet installation in private boat houses or owner docks. Replacement of a failed Hubbell 50A 125/250V receptacle in an existing install. Conversion of a 30A pedestal to a 50A pedestal (combined with the appropriate breaker and wiring upgrade). Custom shore-power solutions for boats or commercial marine installations that need a 50A 125/250V receptacle.
Install. Wire the two 125V hot legs (Black and Red typical), neutral (White), and ground (Green) to the appropriately-marked screw terminals per the install instructions. Mount the receptacle in the existing pedestal or panel cutout (typical 50A receptacle cutout dimensions). Tighten all screw terminals to spec torque. Test continuity, ground integrity, and proper voltage between the legs before energizing the circuit. Total install / replacement time is typically 30-60 minutes for a like-for-like swap.
What this isn't. Not a plug (this is the receptacle that plugs go into). Not a 30A version (this is the larger 50A 125/250V version). Not weatherproof on its own (needs to be housed in a weather-protective enclosure for outdoor use). Not a 50A 250V single-phase configuration (this is the 50A 125/250V split-phase configuration that's standard for U.S. recreational marine).
Hubbell Wiring Device-Kellems is the manufacturer's brand name for the marine wiring devices line. Made in the United States. UL listed, CSA approved, CE certified for global compliance. Hubbell limited warranty applies. Same-day shipping before 3 PM ET on in-stock units.
Key Features
- Marine-grade 50-amp 125/250V Twist-Lock receptacle
- 3-pole 4-wire grounding configuration (two 125V hot legs + neutral + ground)
- Hubbell Twist-Lock locking ring mechanically retains plug under vibration and pull load
- Marine-grade thermoplastic / composite body (non-conductive, corrosion- and UV-resistant)
- Yellow color for visibility (industry-standard 50A receptacle color)
- Screw terminal wire connections (solid or stranded conductors)
- Galvanized mounting hardware
- IP20 rating (indoor dry or outdoor protected by external weatherproof enclosure)
- Compatible with all Hubbell and Marinco 50A 125/250V Twist-Lock plugs
- For marina pedestal install, dock power outlet, or replacement of failed receptacle
- Made in the United States
- UL listed, CSA approved, CE certified
- Manufacturer Part Number HBL63CM69
- Hubbell limited warranty applies
Why Buy from NVN Marine
- Authorized Hubbell Marine reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Hubbell HBL63CM69 Marine-Grade 50A 125/250V Twist-Lock Receptacle, 3-Pole 4-Wire Grounding, Yellow |
|---|---|
| Brand | Hubbell Marine |
| OEM Brand Name | Hubbell Wiring Device-Kellems |
| Manufacturer Part Number | HBL63CM69 |
| UPC | 783585808741 |
| Type | Twist-Lock receptacle (female socket) |
| Application | Marine wiring (shore power, dock power, marina pedestal) |
| Current Rating | 50 amps |
| Voltage Rating | 125/250 V split-phase |
| Total Power | 12,500 watts continuous |
| Configuration | 3-pole, 4-wire grounding (Non-NEMA, Hubbell-standard pin pattern) |
| Locking Mechanism | Hubbell Twist-Lock |
| Color | Yellow (industry standard for 50A 125/250V) |
| Body Material | Thermoplastic / composite (marine-grade) |
| Mounting Hardware | Galvanized steel |
| Wire Connections | Screw terminal (solid or stranded conductors) |
| Environmental Rating | IP20 (indoor dry or outdoor with separate weatherproof enclosure) |
| Compatible Plugs | Hubbell and Marinco 50A 125/250V Twist-Lock plugs (matching pin pattern) |
| Country of Origin | United States |
| Compliance | UL Listed, CSA Approved, CE Certified |
| Warranty | Hubbell limited (per current warranty document) |
Frequently asked questions
What's 50A 125/250V mean?
50 amps of current at 125/250 volts split-phase service. Two separate 125V hot legs (giving you 250V between the legs for high-power equipment, or 125V from either leg to neutral for standard outlets). Total continuous power: 50A x 250V = 12,500 watts. The standard shore power configuration for boats over 35 feet, especially boats with significant air conditioning, large inverter loads, or 230V European-style equipment.
What's the Twist-Lock mechanism for?
Twist-Lock prevents accidental plug disconnect. Insert the plug, rotate clockwise about 30 degrees, the connector pins lock mechanically into the receptacle's locking ring. The plug stays in place against pull load, vibration, and wind - all the conditions that pop a standard non-locking plug out. To disconnect, rotate counter-clockwise to release and then pull. The locking action is the difference between a connector that stays connected during a passing storm and one that pulls free, leaving the boat without shore power.
Will it fit my boat's shore power plug?
It accepts all Hubbell 50A 125/250V Twist-Lock plugs and the equivalent Marinco 50A 125/250V plugs (which use the same pin pattern even though they're a different brand). Essentially every recreational marine 50A 125/250V shore power plug uses this same pin pattern - it's the de facto industry standard. Check the plug on your boat's shore power cord against the receptacle pin pattern photo before assuming compatibility.
Is it weatherproof?
IP20 - meaning it protects against finger contact with live parts but does NOT protect against water ingress directly into the receptacle body. For typical marina pedestal installs where the pedestal door provides external weather protection, IP20 is fine. For installs without a weather-protective housing (e.g., bare-mounted on the side of a building exposed to rain), this isn't the right receptacle - look at higher-IP-rated weather-protected receptacles for those cases.
Why is it yellow?
Yellow is the industry-standard color for 50A 125/250V shore power receptacles. The bright color makes the receptacle easy to spot in low-light conditions and during emergency disconnect situations. Most marina pedestals use yellow for 50A receptacles and a different color (typically white or natural) for 30A receptacles - color-coding helps boat operators quickly identify which receptacle matches their boat's shore power inlet without having to read labels.
Can I install it on my boat instead of on a marina pedestal?
This is a receptacle, which is the female-socket half of the connection. On a boat, you'd install a Hubbell shore power inlet (the male-pin half mounted in the boat's hull) so a marina pedestal cord plugs into the boat. This receptacle is for the marina-side or dock-side install where the boat plugs into the dock infrastructure. For a boat-side install, look at Hubbell's marine inlets in the same 50A 125/250V configuration.
What size wire do I use?
For 50A continuous service, use 6 AWG copper minimum (though 4 AWG is preferred for longer runs to reduce voltage drop). The screw terminals on this receptacle accept up to about 4 AWG. Match the wire gauge to the upstream circuit breaker (50A breaker = 6 AWG minimum) and to the actual run length and load. Use marine-grade tinned copper wire for any installation in the marine environment.
What's the difference between 3-pole and 4-pole?
This is 3-pole 4-wire (3 current-carrying conductors plus a separate ground). The 3 current-carrying conductors are: 2 hot legs (Black and Red typical, providing 125V to neutral or 250V leg-to-leg) plus neutral (White). The 4th wire is the safety ground (Green). The 3-pole 4-wire configuration is the standard for U.S. 50A 125/250V split-phase service. Some industrial 50A applications use different pole counts - those need different receptacles.
How do I install it?
Wire the two 125V hot legs (Black and Red typical), neutral (White), and ground (Green) to the appropriately-marked screw terminals per the install instructions. Mount the receptacle in the existing pedestal or panel cutout. Tighten all screw terminals to spec torque (per the install sheet). Test continuity, ground integrity, and proper voltage between the legs before energizing the circuit. Total install / replacement time is typically 30-60 minutes for a like-for-like swap. Should be installed by a qualified electrician.
Is it really made in the U.S.?
Yes, the Hubbell Wiring Device-Kellems marine product line is manufactured in the United States. UL listed, CSA approved (Canadian standards), and CE certified (European compliance) for global use.
How does it differ from a non-marine version?
Marine-grade thermoplastic / composite body (corrosion- and UV-resistant), galvanized hardware, color-coded yellow housing, and the entire device is engineered specifically for the marine environment with its salt air, humidity, vibration, and constant outdoor exposure. Non-marine equivalents use cheaper plastic that fades and cracks, plain steel hardware that rusts, and aren't color-coded for marine use. The price difference vs. non-marine versions is meaningful but the long-term service life difference in marine service is also meaningful.
What's the warranty?
Hubbell limited warranty applies. Service runs through the Hubbell warranty network. Check the warranty document that ships with the device for the specific terms and coverage period.
