Electrical Feeder Size Chart: Complete Guide 2026
A 100 amp service requires minimum 2 AWG copper or 1/0 AWG aluminum conductors with a 6 AWG copper grounding conductor. For runs over 100 feet, consider upsizing to 1 AWG
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Kind Copper Used Distribution
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Oxygen-Free Copper (OFC) : Created in oxygen-free environments, eliminating oxide impurities. Has marginally better conductivity than ETP but significantly higher cost - perfect for