16520 Lampholder - Porcelain Keyless Lamp Holder The 16520 Lampholder is a porcelain keyless lamp holder designed for residential and commercial lighting applications. Engineered for durability and compliance, it is suitable for use by electrical distributors and lighting solutions providers requiring reliable wire and cable terminations in switchgear and fixture installations. Specifications Material: UV Resistant Porcelain Application: Residential, Commercial, Industrial, Agricultural Lighting Number of Terminals: 4 Fits Outlet Box Size: 3.25 to 4 Inch Conductor Size: 7 Inch Conductor Color: Black, White Product Weight: 33 lbs (per carton) Approval: UL Listed (Canada and US) Applicable Standard: NEC Articles 410.1, 410.50, 410.51, 410.52, 410.80 (A and B), 410.122 Features Nickel-plated E26 brass screw shell resists corrosion UV resistant porcelain housing prevents fading and discoloration Includes corrosion resistant mounting screws Compatible with optional plastic and metal safety cages Meets 2023 National Electrical Code requirements for lamp holders Downloads & Links Specification/Technical Catalog