Electrical Safe Work Practices
All persons who install, maintain, repair, or just work near electrical power equipment needs electrical safety training. United States labor law spells out safe work practices and employee training requirements. This OSHA HAZWOPER - HAZMAT Electrical certificate workplace safety video course provides the information required by OSHA 29CFR1910 Subpart 120, as well as other important safety information not required by OSHA.
A good place to start is the Electrical Safety in HAZMAT Environments certificate course. This recommended course covers, to name a few, arcs, sparks, and high temperatures, NEC's three HAZMAT classes, intrinsically safe electrical systems, confined spaces, and dealing with electricity during a HAZMAT incident.
See also ...
Online OSHA Training Video Library VOD
The more detailed Hazardous Area Instrumentation Training Course
Recommended article Maintenance Safety Training Programs (Cal OSHA)