We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black watertight locking plug L16-30P straight thermoplastic housing three pole four blade

Hubbell Incorporated

Hubbell Incorporated HBL28W76BK Watertight Locking Plug L16-30P 30A 480V AC

SKU CH-RHZ8-AGXAN

Watertight locking plug rated 30 A at 480 V AC with NEMA L16-30P configuration for industrial three-phase power connections

  • Product typeWatertight Devices
  • Watertight seal protects connections in wet environments
  • Three-pole 30 A rating handles heavy-duty 480 V loads
  • Impact- and chemical-resistant thermoplastic elastomer housing withstands industrial abuse
  • Straight screw-terminal wiring accepts cables from .375 to 1 in diameter
  • NEMA L16-30P locking design prevents accidental disconnection under vibration

Watertight Locking Plug L16-30P

This watertight locking plug is an industrial-grade connection device rated for 30 A at 480V AC three-phase power. It is built for electricians and maintenance teams who need a secure, weatherproof connection on generators or heavy equipment. The thermoplastic elastomer housing resists chemicals and impact in harsh environments. The straight orientation suits inline cable assemblies.

NEMA L16-30P Configuration

The single specification that decides fit is the NEMA L16-30P configuration, a four-blade, three-pole, polarized locking interface. Only receptacles marked L16-30R will accept this plug, so verify the mating outlet before purchase. The locking action prevents accidental disconnection under vibration or load. No other NEMA pattern will mate with this device.

Cable Range and Capacity

The plug accommodates cables from 0.375 in to 1 in outer diameter, covering typical SOOW and Type W cords used at this amperage. Screw terminals accept standard stranded conductors for the three poles and ground. The 30 A rating provides headroom for motor starting currents within the device's thermal limits. Cables larger than 1 in or loads exceeding 30 A require a different device.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $70.99
Pricier than about 60% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameHUBBELL
Product typeWatertight Devices

Questions about this item

What does the 30 A rating mean when I wire this plug into a three-phase circuit?

The plug is rated for 30 A continuous current on each of the three poles in a 480 V AC three-phase system.

How does the NEMA L16-30P configuration limit what I can connect to?

The L16-30P locking interface only mates with matching L16-30R receptacles, capping the connection to 30 A, 480 V AC three-phase service.

What cable diameters can the housing actually clamp?

The strain-relief accepts cables from 0.375 in up to 1 in outer diameter.

More in Breakers & Circuit Protection

Similar items