It tells workers to switch off the power supply before doing any maintenance work on equipment. This includes turning off power, shutting off air or gas supplies, and isolating hydraulic systems. The goal is to prevent machines from turning on unexpectedly.

Disconnecting means switching off or removing a plug. Locking out means securing that switch so it cannot be turned on.
A complete safety procedure involves both steps. These signs focus on the step, which is disconnecting.

* On the machine near where work will be done
*Next to the switch or panel that controls power
* On boxes and equipment that need to be turned off before maintenance
* On control panels and at workstation electrical hookups

* OSHA 29 CFR 1910.147 covers controlling hazardous energy
* OSHA 29 CFR 1910.333 covers electrical safety-related work practices for work on or near energized electrical equipment.
* OSHA 29 CFR 1910.145 accident-prevention signs and tags.

The adhesive works best on smooth, clean surfaces. For slightly textured surfaces, press the sign firmly onto the surface, especially around the edges, to get a good bond.

Hazard signs come in different sizes. Some common sizes for hazard signs are 3.5" x 5", 5" x 7", 7" x 10", 10" x 14" These sizes ensure that hazard signs are visible and easy to read. Hazard signs need to be big enough to grab people's attention and small enough to fit in the space available.