: It does not apply to voltages used for signals, measurements, or internal components within electrical devices. Key Voltage Classifications (Tables 1–6)
IEC 60038 2009 Standard Voltages Electrical Supply Systems Design iec 60038 standard voltages pdf 103
: Both AC and DC systems used for railway electrification. : It does not apply to voltages used
, it establishes preferential nominal voltage values to ensure interoperability and safety across electrical networks and equipment. Scope and Application iec 60038 standard voltages pdf 103
The standard applies broadly to alternating current (AC) and direct current (DC) systems, serving as a "horizontal standard" that guides other technical committees. AC Systems: