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Electrical safety in flood situations

Background

Electrical equipment exposed to flood water can be extremely dangerous if re-energized without proper reconditioning or replacement. Flood damage to electrical equipment can sometimes be hidden.

Moisture can get into electrical insulation or debris may be lodged inside the equipment. Floodwaters can also be polluted with chemicals, sewage, oil or other contaminants. These and other factors can affect the ability of electrical equipment to perform properly.

What do I do before evacuation?

In any area where immediate flooding is anticipated, it is essential to shut off all electrical power by turning off the main service switch. If there is time, move as much electrical equipment as possible to floors or areas above the anticipated flood level. It is important not only to be prepared for the flooding, but to make preparations for normal living after the flood had subsided. Note: Always have a flashlight and batteries ready - flooding may occur at night.

Returning home after a flood

Extreme precautions must be observed when returning home to a flood damaged area. Stay well clear of any electrical power wires. Electricity can travel through water. You should immediately report any downed wires to the electric utility (ie: BC Hydro, etc.). No part of a flooded installation can be assumed to be safe, not even the main breaker. Before the equipment is tested or worked on, all power should be disconnected. If the main switch was left in the "on" position, find the main service panel and turn the switch to the "off" position. If this area is still wet or damp, do not stand in water to access the electrical panel. Call an electrical contractor to ensure your safety.

Getting reconnected

There are three main flood-induced processes that cause equipment damage: moisture absorption, corrosion and dirt accumulation. Before reconnecting any portion of the electrical installation, an inspection must be performed by a licensed certified electrical contractor.

Safety tips for cleaning up damp or wet locations

Electricity and water do not mix. To help reduce the risks associated with using electrical appliances in wet locations, use a ground fault circuit interrupter (GFCI) to help prevent shocks. These devices are inexpensive and can help protect you when operating appliances such as dry/wet vacuum or other equipment.

Reconditioning flood damaged equipment

Do not plug in or attempt to use electrical appliances that have been wet until they have been serviced by an electrician or service agency. Electrical equipment that has been submerged may have to be replaced. Ask your electrician or contact the manufacturer or dealer for the nearest service location.

ADDITIONAL CONSIDERATIONS FOR HOUSEHOLDERS

Remove dangerous chemicals such as weed killers, insecticides and corrosives to dry areas to reduce the chance of contaminating electrical equipment.

Shut off all electrical power and the gas supply valve to any gas fired appliance prior to flooding if possible.

Shut off the electrical supply to all oil-fired equipment.

For gas installations, refer to Gas Safety: Guidelines on What to Do in the Event of Flooding.
For the BCSA licensed contractor search click here.

For additional information, please contact the BCSA General Information line: 1.866.566.7233(SAFE).

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