bcorbin said:
Actually, I think he was correct. ANSI may create the standard, but the AHJ (i.e. the government) is the one who stipulates adherence to the standard.
FERC and NERC certainly have beefed up there requirements for transmission systems, especially since the more recent blackouts. However, these entities do not provide oversight of the utility distribution systems, or the voltage variations in which the utility company establishes (based on C84.1) internally. Further, the voltage at the point of utilization is controlled at the substation level by using tap changers on the substation transformers. The taps are adjusted to maintain acceptable maximum and minimum steady state voltages for the customer, so the customer doesn't see the transmission system fluctuations anyway, or care for that matter. Certainly, you could have momentary fluctuations due to a large motor start, especially out on the end of a line, but the normal utilization steady state values will be kept within the standard values.
Please provide a reference, that can be corroborated, supporting your position that there are government agencies that provide distribution line voltage oversight for adherence to any specific standard.