Amazon.com: SP21 4 pin Waterproof Heavy Connector, 2Screw Panel Fix Socket LED Power Cable Plug High Voltage Bulkhead Heavy Connector(4pin) : Tools & Home Improvement
Cheap 4 Pin Waterproof Male Female Connector Cable
PCE 32A 4 Pin 3P+E 400V. 3 Phase. Red Cable Mount Male Plug. IP44 (024-6) 5056439503914 | eBay
IDE Molex 4 Pin Socket Cable - 30cm long : ID 5365 : $0.95 : Adafruit Industries, Unique & fun DIY electronics and kits