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Our friends over at Hubbell have just introduced an inexpensive solution for older boats not equipped with ELCI devices to shut down the shore power to a boat that has some excessive ground fault leakage issues on board. Although this new circuit checker won’t actually shut anything down, and it doesn’t specifically identify ground faults from equipment installed on board, it will identify open grounds and neutral to ground bonds on board that are frequent contributors to AC current leakage from a boat into the water around the boat. The unit simply plugs into an on board outlet and can give you constant monitoring. All good stuff to know.


While conventional 3-wire grounding is essential to electrical safety on a boat, minute faults can still occur that don’t activate protective devices such as fuses or breakers. Hubbell Marine’s innovative HBL5200 outlet circuit tester identifies a wide range of wiring problems to help prevent dangerous electrical situations.

The compact HBL5200 tester simply plugs into a standard residential-style single phase, 125V, 2-pole 3-wire outlet. A series of neon light combinations indicate specific circuit conditions. It can identify correct wiring, reversed polarity, hot terminal unwired, hot and ground reversed and hot wire on neutral terminal, as well as an open ground, neutral or hot wire.

A guide to understanding the neon light codes is permanently attached to the tester on a durable polyester label. It also contains full operating instructions, making the device a handy, portable safety tool.

UL-approved and with a capacity of up to 2,000 amperes, the HBL5200 also works with a variety of adapters to test other 2-pole 3-wire single phase 125V outlet configurations. The MSRP is $55.00.

Contact Hubbell Marine Electrical Products, 40 Waterview Dr.

Shelton, CT 06484. 475-882-4838; Fax: 203-783-9195.

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