What are 1-phase and 3-phase AC power connectors & standards?
Power connectors are primarily designed to ensure a safe and reliable connection of devices to AC mains power, although they are generally specified for AC and DC voltages. AC receptacles and plugs come in various configurations with different blade widths, shapes, positions, and dimensions, designed to make them safe to use and non-interchangeable with different
Source: designworldonline.com