Service Entrance Cables

Service entrance cables deliver reliable power from the utility point to your main electrical panel, built to handle outdoor exposure, high current loads, and strict code requirements. Whether you’re upgrading a residential 200A service or planning a new build, the right cable improves safety, longevity, and inspection success.

Common types include SER (Service Entrance, Round) for above-ground feeders, SEU (Service Entrance, Unarmored) typically for meter-to-panel runs, and USE-2/RHH/RHW-2 for underground service entrance applications. Aluminum conductors offer a cost-effective, lightweight solution for long runs, while copper provides higher conductivity and robust termination performance. Most service entrance cable is rated 600V, sunlight resistant, and designed for wet and dry locations; look for UL listings and markings for quick code verification.

Key benefits:
- Built for harsh environments: UV, moisture, and abrasion resistant jackets extend service life.
- Code alignment: NEC-recognized constructions streamline permitting and inspections.
- Installation efficiency: Correct conductor count and neutral/ground configurations simplify terminations.

How to choose:
- Determine service size: Match ampacity to 100A, 150A, 200A, or 400A service. Popular choices include 4/0-4/0-2/0 AL SER for many 200A installs.
- Define the route: Overhead or exterior walls favor SER/SEU; direct burial or conduit runs often use USE-2/RHH/RHW-2.
- Pick conductor material: Aluminum for budget-friendly long feeds; copper for compact panels or high-stress terminations.
- Check ratings: Confirm temperature (often 90°C wet/dry), sunlight resistance, and wet-location approvals.
- Plan terminations: Use listed connectors, apply antioxidant on aluminum, and torque lugs to manufacturer specs.

Pro tips:
- Maintain proper bend radius and support spacing to protect insulation.
- Create a drip loop at service heads for overhead entries.
- Always follow local amendments to the NEC and consult a licensed electrician.

From meter bases to main breakers, quality service entrance cable provides dependable, code-compliant power delivery. Shop by conductor size, material, jacket rating, and cut-to-length options to match your project’s requirements.