This standard specifies the insulation distance, insulation resistance, and withstand voltage of control equipment (1) used in electrical circuits with a frequency of 50 Hz or 60 Hz, AC 1000 V or less, or DC 1500 V or less. Note (1) The control equipment referred to here includes equipment such as contactors, resistors, control operation switches, limit switches, relays (for motors, protection, and control), terminal blocks, and devices that combine these. Yes, including semiconductor embedded devices. However, wiring equipment, power receiving and distribution equipment, and outdoor equipment are excluded.
JIS C 0704:1995 history
2009JIS C 60664-1:2009 Insulation coordination for equipment within low-voltage systems -- Part 1: Principles, requirements and tests