China ANSI C136.41 NEMA 7pin 5pin Socket Dimming Receptacle for Street Light - China ANSI C136.41, 7pin
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7 Pin NEMA Socket - MI Systems Ltd
5/7pin NEMA socket for street lighting control
ANSI C136.41 dimming Receptacle with shorting Cap NEMA Socket 7 PIN Connector for Outdoor Street Lighting Control: Amazon.com: Tools & Home Improvement
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NEMA 7 Pin Receptacle Specification Sheet
Two Devices, One Goal: Socket Choice Is Critical for Lighting Controls