Electrical Wiring Basics

Electrical Wiring Basics for Beginners (Homeowner Series)

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Electrical wire color codes every electrician should know ⚡ 🔹 120/208V (3Ø, 4-wire) • Black – Phase A (L1) • Red – Phase B (L2) • Blue – Phase C (L3) • White – Neutral • Green – Ground 🔹 277/480V (3Ø, 4-wire) • Brown – Phase A (L1) • Orange – Phase B (L2) • Yellow – Phase C (L3) • Gray – Neutral • Green – Ground ⚠️ Always verify on site — the NEC doesn’t mandate colors, but inspectors expect consistency and proper identification. 💡 Remember: BRB = 120/208 BOY = 277/480 Follow @AboveElectricTr

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