Which organization has standardized the configuration of receptacle contacts based upon the number of poles and wires, as well as the amperage and voltage rating of the product?

• A. National Electrical Code Association
• B. American National Standards Institute (ANSI)
• C. National Electrical Manufacturers Association (NEMA)
• D. International Electronics Organization

Answer: (C)

Standardizing receptacle contacts by the number of poles and wires along with the amperage and voltage rating is done by the National Electrical Manufacturers Association. NEMA publishes the common plug and receptacle configurations used in North America, so the physical arrangement of contacts and the rating markings match. This ensures a matching plug fits only with the intended outlet and can safely carry the expected current and voltage. The other organizations referenced focus on broad codes or general standards rather than defining these specific contact configurations.