A new revision of ANSI C84.1 is scheduled for publication in June 2020. This edition is likely to consider higher allowable voltage ranges and/or voltage rise in dedicated circuits for renewable energy resources to coordinate with IEEE 1547 and the National Electrical Code®. Stakeholders should review the Standard and send comments and proposals to Program Manager Khaled Masri by May 30.
It's important to submit proposals and comments on the form and use exact language – underlining new text and using strikethrough for text to be deleted. A copy of the Standard is available and the proposal/comments form can be downloaded.
The scope of ANSI C84.1 is as follows:
This Standard establishes nominal voltage ratings and operating tolerances for 60 Hz electric power systems above 100 volts. It also makes recommendations to other standardizing groups with respect to voltage ratings for equipment used on power systems and for utilization devices connected to such systems.
This Standard includes preferred voltage ratings up to and including 1,200 kV maximum system voltage, as defined in the Standard.
In defining maximum system voltage, voltage transients and temporary overvoltages caused by abnormal system conditions such as faults, load rejection, and the like are excluded. However, voltage transients and temporary overvoltages may affect equipment operating performance and are considered in equipment application.
The National Electrical Manufacturers Association (NEMA) represents nearly 325 electrical equipment and medical imaging manufacturers that make safe, reliable, and efficient products and systems. Our combined industries account for 360,000 American jobs in more than 7,000 facilities covering every state. These industries produce $106 billion in shipments and $36 billion in exports of electrical equipment and medical imaging technologies per year.