What are 1-phase and 3-phase AC power connectors & standards?

Electrical Wiring Color Codes for AC & DC - NEC & IEC

Electrical Wiring Colours Standards

IEC 60309 - Wikipedia

Electrical Wiring Color Codes - ElectronicsHub USA

Three-phase electric power - Wikipedia

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Understanding 240V AC Power for Heavy-Duty Power Tools - Make

Three Phase Electrical Wiring Installation in Home - NEC & IEC

Tool-less rectangular connectors boast 10,000 mating cycles

Split Phase vs. 3 Phase, Guide to Power

Industrial and multiphase power plugs and sockets - Wikipedia

AC WORKS 1 ft. Adapter Cord 3-Phase 30 Amp 250-Volt L15-30P 4-Prong Plug to L6-30R Locking 250-Volt Connector L1530L630-012 - The Home Depot