Standards and Technical Work

pdfNEMA HV 80036-2016 (R2023) formerly NEMA 107 | Methods of Measurement of Radio Influence Voltage (RIV) of High Voltage Apparatus

This Standard covers the methods of measurement of radio influence voltage in the frequency range of 0.015 to 30 megahertz that may be associated with high-voltage power apparatus used on transmission and distribution systems at line voltages of 0.6 kilovolts and above.

pdfNEMA US 80028 2023 | Gauging and Measuring in ANSI/NEMA C29 Standards

C29 standards regularly reference the use of gauges for measurement with no instructions on how to properly use them. For example, C29.7 and C29.2B both require gauges for use in measuring metal fittings but leave it up to the manufacturer to know how to use the gauge. If the gauges are not used properly, a nonconforming product may pass assessment or, conversely, a conforming product may be rejected.  This paper includes a list of different gauges and what they are used for: thread gauge, yoke gauge, ball gauge, GO/NO-GO, socket gauge, and pin gauge. It also recommends a certain level of accuracy for compliance by the insulator parts and components being measured.