Do not stand on the top four rungs of an extension ladder or the top two steps of a stepladder. Do not stand on the bucket shelf of a stepladder. Use a wooden or composite ladder if you must work near electrical sources. Never use a metal ladder when you or the ladder could contact exposed electrical parts. Never leave a ladder unattended in an area where it could obstruct egress or present potential injury.
Store ladders away from heat and moisture.
De-energizing machines that use electricity, compressed gases, steam, hydraulics, spring tension, or other sources of energy prevents you from being exposed to serious and life threatening situations. Such accidental exposures can cause severe scalding or burns, extremities or clothing to get caught in a machine's moving parts, or fatal shock. Do not service or perform maintenance on machines or equipment until all forms of energy are properly controlled. Be certain to include the length of time you expect the work to take. If there are shift changes, make sure others who may be affected are informed.