Working on Energized Machinery, Equipment, or Systems

Failure to effectively deenergize and isolate all energy sources before servicing can lead to severe injury or death.

Before work begins, properly isolate and deenergize the machinery, equipment, or system being worked on. Always test the machinery, equipment, or system for voltage before work is started or resumed, and wear the appropriate PPE for the hazard/risk category (see tables at pages D6 and D7).

Electrical Equipment Failure or Dropped Tool

Equipment failure or a dropped tool can cause sparks that may lead to an arc flash or blast.

Ensure that the tools, meters, and other equipment used for servicing equipment are regularly maintained in good condition and are suitable for the voltage and current levels of the machinery, equipment, or system being worked on. Insulated tools may be necessary.

Wear the appropriate PPE for the hazard/risk category (see tables at pages D6 and D7).