In October, MET Labs joined other C12 Accredited Standards Committee members in Charleston, SC at the EEI Transmission, Distribution & Metering Conference to discuss proposed revisions to ANSI C12.1, ANSI C12.20, and others, for the evaluation of Watthour Meters.

This post is a summary of some of the proposed changes discussed during the Electricity Metering Subcommittee 1 & 16 meetings. 

Accuracy Class
ANSI C12.1-2013 is now in a draft format and is due for release soon.  The 0.5% accuracy class will be added to C12.1.  This will effectively allow non-Blondel meter forms to have a specification at the 0.5% accuracy class.

Service Switch Working Group
Technical Report C12.30 on testing metering devices equipped with service switch has passed the comments phase and is ready to go to publication.

Harmonics tests will be added under Section 5.5.6 of the C12.20 standard in the next revision, due out in 2015.

Safety Working Group
UL 2735 Safety standard for Electric Utility Meters is now published as a non-consensus standard.

The next C12 Accredited Standards Committee meeting is April 9, 2014 in Phoenix, AZ.

Questions about the proposed changes?  Ask Pat, our meter approvals expert.

Contact us to discuss your electricity meter testing requirements.

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