Do dishwashers require a switch if they have a standard plug instead of being hardwired, or is it unnecessary to have both?
Asked by Ernesto Orosco 
1 month ago
Last Updated: October 21, 2024
Our previous dishwasher had a real switch that controlled the outlet. Do you know if all dishwashers need a switch if they have a regular plug-in and are not hardwired? It seems like you should only have a switch for hardwired ones or a standard plug, not both, right? I’m planning to check the local code on Monday, but I want to have an idea of what to get from the hardware store this weekend.
Having a switch is unnecessary for either appliance. It’s likely they made a mistake and wired it incorrectly. The dishwasher simply needs a way to disconnect, either through a plug or a breaker.
That was my understanding. Thanks!
Didn’t know about the switch when we first moved in. Now that it’s being redone, we want to ensure it’s done correctly!
Not right. You need a way to disconnect at or near the appliance.
In the past, we used to always install a switch and hardwire the dishwasher. But things changed and now they require GFI protection. So we installed a GFI protected outlet under the sink for them.
Just a breaker on its own is not enough.
So if it’s a plug instead of hardwired, there’s no need for a switch, right? According to google, it says switch or plug?
That’s right. It’s just a way to disable it for maintenance.
Can you show me where it says you can’t hardwire? If you can’t, then it must be okay.
Just because it says ‘shall be permitted’ doesn’t necessarily mean it is required.
Well, to begin with, it’s not mentioned in the section discussing the types of cords you can use.
There is another acceptable method, but the question wasn’t about breaker locks either.
Dishwashers can be equipped with motors that exceed 1/8hp. Any motor equal to or greater than 1/8hp must have a visible disconnect, or a lock must be installed in the panel.
422.31(C)
Explains that a breaker serves as a disconnecting means. All you have to do is find a way to secure it.
Definitely, in cases where it is relevant. Some panels may not support a lockout mechanism.
I keep my dishwasher plugged in under the cabinet with a plug, so I don’t need a switch to turn it on.
I actually have a switch for the dishwasher and garbage disposal right next to each other on a GFI. That was required by code at the time of installation.
I feel the same way. I really dislike it!
Perhaps the switch was installed to avoid children accidentally starting the dishwasher?
Is unsure – the item was hidden under the sink
Understood.
I’ve witnessed numerous instances where garbage disposals were taken out and dishwashers were installed with a specific disposal circuit and switch.