Safe Work Practices & Workplace Controls
Barricades, signage, GFCI protection, working space, housekeeping, illumination, conductive articles, dropped tools, and cover management.
- Describe barricade and signage requirements for controlling access to electrical hazard areas
- Explain working space and housekeeping requirements around electrical equipment
- Identify illumination requirements for work on or near energized equipment
- State the rules for conductive articles and portable equipment near energized parts
- Describe GFCI requirements and portable equipment grounding
Leçon 1
Barricades, Signage & Access Control
Controlling Access to Hazard Areas
When energized work is being performed, unqualified persons must be prevented from entering the hazard area. NFPA 70E requires a combination of barricades, signage, and attendants to control access.
Barricades must be placed to restrict access to work areas where uninsulated energized conductors or circuit parts are exposed. Barricades must be:
- Placed at the arc flash boundary distance
- Made of non-conductive material when used near energized parts
- Accompanied by safety signs warning of electrical hazards
Barricades
Purpose: Physical restriction of access
Placement: At arc flash boundary
Material: Non-conductive near energized parts
Duration: Remain until work is complete
Attendants
Purpose: Active monitoring of access
Placement: At entry points to hazard area
Authority: Can warn and redirect personnel
Required: When barricades alone are insufficient
Safety Signs
Safety signs must clearly indicate the electrical hazard and restrict unauthorized access. Signs must comply with ANSI Z535 standards and include:
- DANGER header for immediate hazard situations
- WARNING header for potential hazard situations
- Shock and arc flash hazard identification
- PPE requirements for entry
Exam Tip - Sign Colors
DANGER signs use a red header (immediate hazard). WARNING signs use an orange header (potential hazard). CAUTION signs use a yellow header (minor hazard). The exam may ask which sign type is appropriate for energized electrical work.
Barricades at the arc flash boundary and safety signs are required to prevent unqualified persons from entering hazard areas during energized work. Attendants provide active monitoring when barricades alone are insufficient.