Cable Sizing Better - Earth

Stay safe, and keep that ground path solid. Disclaimer: This post is for informational purposes. Always consult your local electrical code (NEC, IEC, BS 7671, AS/NZS 3000) and work with a licensed electrician.

| Phase Conductor (mm²) | Min. Copper Earth (mm²) – if same material | |-----------------------|---------------------------------------------| | 1.5 | 1.5 | | 2.5 | 2.5 | | 4 | 4 | | 6 | 6 | | 10 | 10 | | 16 | 16 | | 25 | 16 | | 35 | 16 | | 50 | 25 | | 70 | 35 | | 95 | 50 | | 120 | 70 | earth cable sizing

[ S = \frac\sqrtI^2 \times tk ]

When in doubt: . The cost of one cable size up is trivial compared to the cost of a failed protection path. Stay safe, and keep that ground path solid

If you’re designing or installing an electrical system, you already know the importance of live and neutral conductors. But the earth cable (protective conductor or grounding conductor) is arguably the most critical wire for safety . It’s the silent guardian—the path that clears a fault and saves lives. | Phase Conductor (mm²) | Min