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If your power source is 120 V then 8000/120 = 66.7 Amps. If operated at 240 V then it is 33.3 Amps. In the first case you would need 3 AWG and in the second 8 AWG.

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13y ago
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5mo ago

For an 8 kW heater, you would typically use 10-gauge wire with a 30 amp breaker. Always consult the manufacturer's specifications and local electrical codes to ensure proper sizing and installation.

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Q: What size wire and breaker for 8 kw heater?
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