State Water Heaters Commercial Electric Water Heaters Instruction Manual page 15

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The water heater's electrical components are pictured and identified on page 7. The following describes the heater circuits and includes wiring
diagrams. All heater circuits are designed for 60/50 hertz alternating current. The water heater circuit wiring is 12 AWG, AWM, or TEW type,
rated 600 volts, 105°C. Fusing consists of three 30 amp fuses for each contactor. Fusing is an optional feature for Canadian models.
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