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Is it not advisable to branch off a dishwasher power line to another receptacle?

Is it not advisable to branch off a dishwasher power line to another receptacle?

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Old 11-16-18, 11:04 AM
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Is it not advisable to branch off a dishwasher power line to another receptacle?

I want to install an under sink hot water/filter tank; however, I have no receptacle to plug in or power the unit. I was wondering if I can just get power from dishwasher power line. Is it against code or highly not advisable?
 
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Old 11-16-18, 11:16 AM
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It depends on how many watts each appliance is rated for and how many amps is the circuit. It is unlikely you can share a circuit with an instant water dispenser because those usually require a full 15A by themselves.
 
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Old 11-16-18, 11:50 AM
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I see. So, as long there is enough wattage and amperage, it's fine, correct?
 
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Old 11-16-18, 12:26 PM
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My last home had code that prohibited sharing a DW circuit. Is this water heater supplying the DW?
 
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Old 11-16-18, 12:38 PM
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The rules in the code are that if either appliance is more than 50% of the ampacity of the circuit, it requires a dedicated circuit; and both appliances together cannot exceed 80% of the circuit ampacity.

For a 15A circuit this means any appliance greater than 900W (7.5A) needs a dedicated circuit, and the two together cannot exceed 1500W (12A).

For a 20A circuit this means any appliance greater than 1200W (10A) needs a dedicated circuit, and the two together cannot exceed 1800W (16A).
 
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Old 11-16-18, 02:29 PM
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Awesome! Thanks for the explanation. Looks like I'll need a dedicated line or something else.

No, this water heater do not supply the water to the DW.
 
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