NEMA Publishes Standard for Electricity Meters

Oct. 12, 2010
The National Electrical Manufacturers Association (NEMA) has published ANSI C12.20-2010

The National Electrical Manufacturers Association (NEMA) has published ANSI C12.20-2010, "American National Standard for Electricity Meters—0.2 and 0.5 Accuracy Classes." The standard, last published in 2002, was produced by the ANSI C12 Accredited Standards Committee for Electricity Metering, Subcommittee 16.

ANSI C12.20 establishes acceptable performance criteria for electricity meters, and covers accuracy class designations, current class designations, voltage and frequency ratings, test current values, service connection arrangements, pertinent dimensions, form designations, and environmental tests.

In this revision, the standard was broadened to allow three-phase current and voltage sources as an optional test method to the existing single-phase, series, parallel method.

The contents and scope of ANSI C12.20 may be viewed, or a hardcopy or electronic copy purchased for $67, by visiting www.nema.org/stds/c12-20.cfm or by contacting IHS at (800)-854-7179 (within the United States), (303) 397-7956 (international), or global.ihs.com.

Voice your opinion!

To join the conversation, and become an exclusive member of EC&M, create an account today!

Sponsored Recommendations

Electrical Conduit Comparison Chart

CHAMPION FIBERGLASS electrical conduit is a lightweight, durable option that provides lasting savings when compared to other materials. Compare electrical conduit types including...

Don't Let Burn-Through Threaten Another Data Center or Utility Project

Get the No Burn-Through Elbow eGuide to learn many reasons why Champion Fiberglass elbows will enhance your data center and utility projects today.

Considerations for Direct Burial Conduit

Installation type plays a key role in the type of conduit selected for electrical systems in industrial construction projects. Above ground, below ground, direct buried, encased...

How to Calculate Labor Costs

Most important to accurately estimating labor costs is knowing the approximate hours required for project completion. Learn how to calculate electrical labor cost.