Demo Product- NEMA 7 PIN Wiring Photocell Receptacle - YouTube
GE Industrial TMPR312322R 3-Phase Meter Stack Module 7 Jaw 3 Socket 225-Amp Meter Mod
GE TMPR312140RB 1-Socket Ringless Meter Mod Meter Stack Module With 7-Jaw Terminal, Lever Bypass, 240 to 120 VAC/208Y/120 VAC, 1200 A, 3 ph Phase, 4 Wires, NEMA 3R Enclosure | State Electric
3 pin vs 5 pin vs 7 pin photocell receptacles - NEMA street light photocell standards
GE, 200 A Amps, 480/600V AC, Bus Plug - 6CNY9|SB364RG - Grainger
GE GED0751 Straight Blade Plug Cord End 50A 277V 2-Pole 3-Wire NEMA 7-50P 32664392702 | eBay