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Georgia State University - Physics Department - Household Wiring ~ Polarized Receptacles (diagram)

NoOutage.com - NEMA Configurations (socket configurations)

Power Cabling - NEMA Configurations  (socket configurations)

Stay Online - NEMA Plug & Receptacle Configurations Reference Chart (Straight Blade) (socket configurations)

Stay Online - NEMA Plug & Receptacle Configurations Reference Chart (Locking) (socket configurations)

System Connection - Power Cord NEMA Mold Chart  (socket configurations)