water heater disconnect


Old 11-17-17, 10:52 AM
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water heater disconnect

Is there any reason that the disconnect/safety switch at a water heater has to have a fuse inside it?
Why can't you just use a disconnect switch by itself no fuse?
Old 11-17-17, 11:09 AM
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There is no need for a fuse as long as the circuit is properly protected at the main panel. A simple A-C disconnect or 2-pole switch is adequate. Most water heaters today have 4500 watt elements and either a 25 amp or 30 amp circuit breaker is all that is needed for protection.

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