Sigma 02-51253 ProConnex 1'' D Die-Cast Aluminum Service Entrance Head For NM/SE Provide a secure and weather-resistant connection point for overhead service entrances with the Sigma Engineered Solutions 02-51253 ProConnex service entrance head, a durable, code-compliant solution designed for safe electrical service entry in both residential and commercial installations. Constructed from die-cast aluminum, this 1-inch diameter service cap offers excellent strength and corrosion resistance, making it ideal for outdoor use in wet and exposed environments. Designed for use with NM (Non-Metallic) and SE (Service Entrance) cables, this service entrance head acts as a transition point where overhead service wires enter a building through rigid, IMC, or EMT conduit. It features a clamp-on design that allows for quick and easy installation on both threaded and unthreaded 1-inch conduit?no special tools or threading required. This versatility simplifies field installation and accommodates a variety of service configurations. The cap includes a high-quality phenolic insulator with five knockout holes: two 7/16-inch and three 1/2-inch openings?allowing for flexible cable routing and compatibility with multiple wire gauges. The insulator prevents electrical contact between conductors and the metal housing, ensuring safe and reliable performance in live-service applications. The die-cast aluminum body provides robust protection against moisture, dust, and mechanical impact, while its silver finish enhances heat dissipation and blends with standard electrical enclosures. Rated for wet locations, this service entrance head is UL and CSA listed, meeting rigorous safety standards for outdoor electrical installations. Its compact size measures 2.75 inches in length and weighs just 0.300 pounds, offering a lightweight yet durable solution for service mast and weatherhead applications. Features - 1-inch service entrance head for overhead electrical service connections - Clamp-on design fits 1-inch threaded or unthreaded Rigid, IMC, and EMT conduit - Compatible with NM and SE cables for versatile service entry applications - Die-cast aluminum construction for strength, durability, and corrosion resistance - Phenolic insulator with (2x) 7/16" and (3x) 1/2" holes for flexible wire routing - Suitable for wet locations?ideal for outdoor and exposed installations - UL Listed and CSA Listed for compliance with North American safety standards - Easy installation without need for conduit threading - Lightweight at 0.300 lb for reduced load on service masts - Packaged individually in a box for protection and handling Specifications - Brand Name: Sigma Engineered Solutions - Model Name: Sigma Engineered Solutions 02-51253 - Part Number: 02-51253 - UPC: 031857512538 - Product Type: Service Entrance Head - Diameter: 1 in - Material: Die-Cast Aluminum - Color: Silver - Length: 2.75 in - Each Weight: 0.300 lb - Conduit Compatibility: NM/SE - Application: Wet Location - Insulator Type: Phenolic - Knockout Sizes: (2) 7/16 in, (3) 1/2 in - UL Listed: Yes - CSA Listed: Yes - Number in Package: 1 - Packaging Type: Boxed - Sub Brand: ProConnex - Manufacturer: Sigma Electric Product Application The Sigma Engineered Solutions 02-51253 ProConnex service entrance head is engineered for use in overhead electrical service installations where safe, weatherproof entry is required. Commonly installed on service masts, weatherheads, and risers, it provides a secure transition point for utility-supplied power into a building?s main disconnect or meter base. Its wet-location rating and corrosion-resistant construction make it well-suited for coastal, humid, and all-weather environments. Trusted by electricians and contractors, this service head supports reliable, compliant, and long-lasting electrical service connections in both new construction and upgrade projects.