Change Summary

• New signage requirement at 555.24 for precautionary signage related to electric shock hazard in water around marinas and boatyards.

Expert Analysis

A new 555.24 was added to the 2017 NEC requiring the posting of signage to alert personnel coming into the vicinity of marinas and boatyards of the potential for shock hazards in the water in and around these nautical areas. Numerous ESD deaths and injuries (including electrocution in the water) at marinas and boatyards have been documented and investigated over the last decade.

The signage must comply with 110.21(B)(1) and be clearly visible from all approaches to a marina or boatyard facility. The signs shall state: “WARNING — POTENTIAL SHOCK HAZARD — ELECTRICAL CURRENTS MAY BE PRESENT IN THE WATER.” It is recognized that inspection and regular maintenance activities which often require personnel entering the water will still be required in these marinas and boatyards. Preventative actions such as disconnecting shore connections to boats at and near the work location, securing power to docks or sections of docks, and wearing protective equipment (such as wet suits) can be used to provide adequate protection for maintenance personnel. The general public does not have an understanding of the potential electrical dangers present within the confines of marinas and boatyards. Marina and boatyard operators clearly have a responsibility to provide protection from electrical hazards as is stated in NFPA 303 (Fire Protection Standard for Marinas and Boatyards).