Electrical Wire to never work with anything electrical while there is water on the floor and to not be wet while you are working on anything electrical. If there is moisture present and it can't be helped, then you can put down dry boards or use a rubber mat while working. You should also use common sense and not touch anything metal while working on electrical wiring. Be aware of your surroundings and clear the area of anything metal before getting near a live wire.
It may also help to use tools that have insulated handles. These are the ones with a rubber or plastic coating and will not conduct the electricity easily if you do happen to touch a live circuit. Make sure that your shoes have rubber soles or wear sneakers, and safety goggles or glasses are smart to wear while Cca Wire working.