Historical
ANSI C37.85-2002 (R2010)
AC High-Voltage Power Vacuum Interrupters - Safety Requirements for X-Radiation Limits
Specifies the maximum permissible X-radiation emission from ac high-voltage power vacuum interrupters that are intended to be operated at voltages above 1,000 V and up to 38,000 V when tested in accordance with procedures described in this standard.
NEMA: National Electrical Manufacturers Association [nema]