Normal Operating Condition Examined

What constitutes a “Normal Operating Condition”? How is it obtained and what does it mean for electrical safety work practices? This paper will examine the use and application of National Fire Protection Association's (NFPA) 70E® Section 110.4(D) entitled “Normal Operating Condition”[1]. Some of this information is only valid in the U.S.A. NFPA 70® is not an international standard and regulation.