Electrical wiring and equipment exposed to flood waters can be extremely dangerous if reenergized without replacement or reconditioning. Initially it may not be apparent but the integrity of the electrical system and its components have been severely impaired, jeopardizing the safe electrical wiring system due to contaminations and sediment lodged in the equipment along with the corrosive action that will develop. This will also be true in a high humidity area that exists when flood waters are in a building.
The following policy has been adopted by the North Dakota State Electrical Board on:
All breaker panelboards, breakers, fuses, disconnect switches, controllers, receptacles, switches, light fixtures, electric heaters that have been submerged must be replaced.
All electrical equipment, switchgear, motor control centers, boilers and boiler controls, electric motors, transformers and other similar equipment such as appliances, water heaters, dishwashers, ovens, ranges that have been submerged need to be reconditioned by the original manufacturer or by its approved representative or replaced.
Electrical wiring may require replacement depending on the type of wire or cable and what application it was listed for.
Splices and termination must be checked to make sure they comply with Article 110-14.
The electrical system needs to be certified by a licensed North Dakota electrical contractor to assure that the electrical system will be safe to energize.
Other recommendations can be found in Guidelines for Handling Water Damaged Electrical Equipment published by the National Electrical Manufacturers Association (NEMA)