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Contact SupplierThe most important physical properties of lead-sheathed copper used for the earth electrodes: | ||
---|---|---|
Thickness of lead sheath | mm | 2 |
Electrical resistivity of copper at 20°C | Wmm2/m | 0.02 |
Copper melting point | °C | 1083 |
Lead melting point | °C | 327 |
Current density at which the conductor temperature rises from 40°C to 150°C in a time of 1 s if all heat is retained in conductor | A/mm2 | 140 |