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Red watertight mechanical interlock with pin and sleeve receptacle

Hubbell Incorporated

Hubbell Incorporated HBL430MI9W 30 A 240 V 3P4W Watertight Mechanical Interlock

SKU CH-9M5T-32HBN

Watertight mechanical interlock with integrated disconnect switch for 30 A, 240 V three-phase pin-and-sleeve connections

  • Product typeWatertight Devices
  • Product colorRed
  • Watertight safety for wet environments
  • 30 A 240 V three-phase power capacity
  • IEC 60309-2 plug compatibility ensured
  • Mechanical interlock prevents live disconnection
  • Non-metallic housing works with metallic conduit

Watertight 30 A Interlock

The Hubbell HBL430MI9W is a non-fused Circuit-Lock mechanical interlock rated for 30 A at 240 V AC three-phase four-wire service. Its red thermoplastic housing provides IEC 60309-2 pin-and-sleeve connections for indoor or outdoor wet locations. The integrated switch and receptacle prevent plug insertion or removal while power is on.

30 A 240 V Three-Phase Rating

This unit accepts conductors from #12 AWG to #8 AWG and supports motor loads up to 7-1/2 hp per manufacturer specifications. The 600 V AC maximum voltage rating covers standard industrial three-phase supplies. Buyers needing a fused disconnect or a different amperage must select another model.

Conduit-Ready Pressure Terminals

The non-metallic enclosure works with metallic conduit without breaking ground continuity when installed per the supplied instructions. Pressure terminal screws secure the conductors inside the watertight housing. Installers must follow the grounding requirements in the manual to maintain the enclosure's environmental seal.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $1,072.99
Pricier than about 90% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameHubbell Wiring Device-Kellems
Model nameHBL430MI9 W
Product typeWatertight Devices
Product colorRed

Questions about this item

What does the 30 A rating mean for actual motor loads?

The 30 A rating supports motors up to 7-1/2 hp at 240 V AC three-phase, so the interlock can directly switch typical industrial pumps or compressors within that range.

How does the IEC 60309-2 pin-and-sleeve interface limit what I can plug in?

Only IEC 60309-2 plugs rated for 30 A, 3-pole 4-wire, 240 V AC (blue, 9-hour keyway) will engage, and the interlock mechanically prevents insertion or removal of any other plug type or voltage rating.

What conduit and wire sizes does the housing accept for installation?

The non-metallic thermoplastic housing works with metallic conduit without breaking ground continuity and accepts #12 AWG to #8 AWG conductors under the pressure terminal screws.

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