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Blue watertight mechanical interlock enclosure with switch and receptacle

Hubbell Incorporated

Hubbell Wiring Device-Kellems HBL560MI9W Watertight Mechanical Interlock 60A 120/208VAC 15HP

SKU CH-BA1J-YAAHC

Watertight mechanical interlock rated 60 A, 120/208 V AC, 15 HP with IP67 protection and OSHA lockout compatibility

  • TypeWatertight Devices
  • ColorBlue
  • Watertight IP67 rating protects connections in harsh environments
  • Mechanical interlock prevents energised insertion or removal of plug
  • 60 A / 120–208 V AC three-phase power handling
  • Lockable disconnect meets OSHA lockout/tagout requirements
  • Non-metallic thermoplastic housing resists corrosion and impact

Watertight Mechanical Interlock for 60 A Service

The Hubbell HBL560MI9W is a pin-and-sleeve mechanical interlock rated for 60 amps at 120/208 VAC three-phase with a 15 hp motor-load rating. It combines a disconnect switch and receptacle in a single non-metallic housing that meets IP67, NEMA 4X and NEMA 12 requirements for indoor or outdoor wet locations. The interlock prevents the switch from energising until the plug is fully seated and blocks plug removal while the switch is on. A lockable handle supports OSHA lockout/tagout procedures for maintenance safety.

Thermals Noise and Power Draw in Normal Use

The device carries up to 60 A at 600 V AC maximum with pressure-terminal screws that accept #8 to #2 AWG conductors for secure, low-resistance connections. Its thermoplastic enclosure resists corrosion, impact and UV exposure without metallic heat sinks or moving air, so it adds no audible noise to the installation. Power dissipation is limited to the contact resistance of the mated pins and sleeves under load, and the watertight seals maintain ingress protection across the operating temperature range.

Integration Into a Build

The interlock mounts on a flat surface and accepts compatible pin-and-sleeve plugs such as the 5Z920 to complete a 4-pole, 5-wire circuit. It requires no separate fuse holder or external operating mechanism, freeing panel space and reducing component count. The lockout-ready handle and mechanical interlock satisfy safety procedures without additional hardware, while the IP67-rated housing eliminates the need for a separate weatherproof enclosure in wash-down or outdoor environments.

Highlights

  • Watertight IP67 rating protects connections in harsh environments
  • Mechanical interlock prevents energised insertion or removal of plug
  • 60 A / 120–208 V AC three-phase power handling
  • Lockable disconnect meets OSHA lockout/tagout requirements
  • Non-metallic thermoplastic housing resists corrosion and impact

Specifications

BrandHubbell Wiring Device-Kellems
ModelHBL560MI9W
TypeWatertight Devices
ColorBlue

Questions about this item

How is the Hubbell HBL560MI9W mounted and wired, and what step do installers often miss?

Mount the non-metallic thermoplastic enclosure on a flat surface, route conductors through the hub, and land wires on the pressure terminal screws; the step often missed is torquing each screw to the specified value so the #8 AWG to #2 AWG conductors stay secure under vibration.

What maintenance or replacement will the HBL560MI9W need over time?

Inspect the IP67 gasket and locking ring for cracks or UV damage, verify the mechanical interlock still blocks switch operation when the plug is not fully seated, and replace the receptacle interior if contact surfaces show pitting or overheating discoloration.

What limit appears first when the HBL560MI9W runs at full load continuously?

The 60 A / 15 HP rating at 120/208 V AC three-phase Y is the thermal ceiling; sustained operation at that level will hit the temperature rise limit of the pressure terminals and interlock mechanism before any other constraint.

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