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Electric Power >> Hazardous Energy Control >>
Equipotential Zone
Hazardous Energy Control
Equipotential Zone
An
equipotential zone is a work zone in which the worker is protected from
electric shock from differences in electric potential between objects in the
work area. These differences in potential can be caused by induced voltage, line
reenergization, or lightning. The worker in an equipotential zone is protected
from electric shock because there is a near identical state of electrical
potential between any two points on the body. To ensure that personal protective
grounds will protect the worker from hazardous step- and touch-potential
conditions, it is essential to employ recognized good engineering grounding
methods, such as those in the IEEE Guide for Protective Grounding of Power
Lines, IEEE 1048-2003. Those methods comply with the performance-oriented
equipotential zone requirements contained in 1910.269(n)(3).
Power lines and equipment are considered energized and must be worked as live
(with rare exception) if deenergized lines are not properly grounded.
Energized vs. Deenergized Work
Protective Grounding (Bonding)
Hazard Assessments and Job Briefings
Grounding for Employee Protection
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