Can you put a garbage disposal on a smart switch?

Two answers circulate, and both read the wrong number#

The first answer says any 15 A smart switch is fine. A disposal draws 6 or 7 A, well under 15. The second says a smart switch will fry, because the National Electrical Code's motor table puts a 3/4 hp motor at 13.8 A.

Start with the term both skip. A horsepower rating on a switch is the largest motor its maker says it can start and stop. It is printed apart from the amp figure. The 15 A on a Kasa HS200 is a "General Use" rating, for lights and plain loads. The same spec line gives its motor rating: "1/6 HP Motor." That is the number for a disposal.

So the first answer reads the wrong line on the switch. A 6.3 A disposal is well under 15 A, and over what 1/6 HP stands for.

The second answer uses the right table on the wrong device. NEC Table 430.248 lists the full-load current of single-phase motors at 115 V. It puts 1/2 hp at 9.8 A, 3/4 hp at 13.8 A and 1 hp at 16 A. Those are not what a disposal draws. InSinkErator rates its 1/2 hp Badger 5 at 6.3 A, and Waste King's 1 hp L-8000 is listed at 7 A. The table is useful for the opposite job: it turns a switch's horsepower rating into amps. The same conversion runs through the sump pump page and the window air conditioner page.

Neither answer opens the disposal manual. That is where the deciding figure is.

What the disposal makers ask of the switch#

InSinkErator's installation manual for the Badger 1, 5, 5XP, 9 and 10s (75393 Rev A) says it plainly:

This disposer requires a switch with a marked "Off" position (wired to disconnect all ungrounded supply conductors) installed within sight of the disposer sink opening (1 hp minimum rating).

A KitchenAid disposer manual from 2013 (KCDB250 and KCDI075B, 77174 Rev. A) carries the same words. It also calls for a separate 15 or 20 A, 115 V circuit.

Three things in that sentence matter here:

1. 1 hp minimum. The floor is set by the disposal maker, not by the motor's own size. The Badger 5 is a 1/2 hp disposal. Its manual still asks for a 1 hp switch.
2. A marked "Off" position. The switch is the off control you trust when you reach in.
3. Within sight of the sink opening. You can see the switch from where your hand goes.

The code points the same way. EC&M's reading of the 2020 NEC (422.31(C)) says the disconnect for a motor-operated appliance over 1/8 hp must be "within sight" of it, or lockable. The exception is a switch built into the appliance itself. The manual's "within sight" wording matches that rule.

Waste King's owner's guide (560C485P01 Rev A) gives no switch rating. For a disposal like that, the general motor rule applies. EC&M quotes NEC 430.83(A): a controller "must have a horsepower rating not less than that of the motor." California's Title 8 rules use the same words.

The disposals, as their makers rate them#

The Badger 5 has two official figures. The current InSinkErator page says 6.3 A "average load". The 2007 submittal sheet (H593-07E-64-02) says 6.9 A, also at average load. Plan on the higher one.

The Waste King row shows how far a disposal's horsepower can sit from its amps. A 1 hp motor in the NEC table draws 16 A, yet this one is listed at 7 A. EC&M noted the pattern in 1995: appliance makers often use horsepower labels for advertising, while nameplate currents are checked. That gap is why people argue in amps.

Eight smart switches against the 1 hp floor#

Each rating is as its maker or seller publishes it, read in November 2026. The middle column converts horsepower with NEC Table 430.248 at 115 V.

Sources: Kasa HS200 page, Lutron spec submittal 369987m, Inovelli's VZM31-SN manual, Leviton's D215S and D315S pages, Zooz's ZEN71 800LR manual, and the Ameridroid and CloudFree ZEN75 listings.

What the table settles:

• The common Wi-Fi switch fails even on amps. At 1/6 HP, or 4.4 A, the HS200 is under the Badger 5's 6.3 A average-load rating.
• Lutron and Inovelli publish no horsepower rating. An unpublished rating cannot meet a 1 hp minimum. Lutron's fan figure is for ceiling fans, which have their own controls, as choosing a smart switch for a ceiling fan explains. Inovelli rules out inductive loads outright.
• Leviton's newer switch is smaller. The D215S was rated 3/4 HP. Its suggested replacement, the D315S, is rated 1/3 HP.
• Zooz says no in its own manual. The ZEN71 has a 1/2 hp rating, but Zooz forbids motor-operated appliances on it.
• The ZEN75 is the one exception. It is the only switch here at 1 hp. CloudFree's listing says it "works as a controller, but not as a disconnector", and that an external disconnect "should be installed" where power must be fully off for servicing.

The plug-in route lands in the same place. Leviton's D215P plug, now discontinued, is rated 3/4 HP, short of 1 hp. Why motors are hard on any relay is in smart plugs and energy monitoring.

Worked through: a Badger 5 on a Leviton D215S#

Take the case most people have in mind. A 1/2 hp Badger 5 sits under the sink. Suppose the wall switch is to become a Leviton D215S, the strongest Leviton smart switch on this page. Walk each argument through the published figures.

• The "6 to 7 A" argument. The Badger 5 is rated 6.9 A at most. The D215S is a 15 A switch. That passes.
• The motor table argument. A 3/4 HP rating converts to 13.8 A. The Badger 5's own 1/2 hp converts to 9.8 A. That passes too, with room to spare.
• Horsepower against horsepower. A 3/4 HP switch on a 1/2 hp motor clears NEC 430.83(A). That passes.
• The disposal maker's manual. InSinkErator asks for 1 hp minimum. The D215S is 3/4 HP. That fails.

So the switch that clears both forum arguments still fails the one document that names a number for this disposal. Swap in a Kasa HS200 and it fails every test: 4.4 A is under 6.3 A before you open the manual.

Now take the 1 hp Waste King L-8000. Its guide gives no switch rating, so there are two ways to read it. Horsepower against horsepower, the wording of NEC 430.83(A), needs a 1 hp switch, and only the ZEN75 has one. Amps against amps uses the marked 7 A. EC&M describes a 2017 NEC exception, 430.6(A)(1) Exception No. 3, that allows this for a listed appliance marked with both horsepower and amps. On that reading the D215S's 13.8 A covers it, which is the method the sump pump page uses for pumps. The HS200's 4.4 A fails on either reading. Where the label's horsepower sits this far above its amps, plan on the horsepower.

The bigger problem is remote turn-on#

Say you find a switch with the rating. The hazard that is left has nothing to do with amps.

Every disposal manual read here assumes off means off. InSinkErator: "Do not put fingers or hands into a waste disposer." Then: "Turn the power switch to the off position before attempting to clear a jam, removing an object from the disposer or pressing reset button." Waste King's guide has the same two warnings, without the reset button, and tells you to use "long-handled tongs or pliers" to take things out.

A smart switch makes off a state that other things can change. A schedule can change it. So can an "all on" scene, a voice assistant that mishears, or a phone in someone else's pocket. Zooz says it directly in the ZEN71 manual: "Remote control of appliances may result in unintentional or automated activation of power."

The plain switch the manual asks for has one way to turn on: a hand on the switch, in sight of the sink. A smart switch adds ways that cannot see the sink. And the one switch with the rating is sold as a controller, not a disconnect.

A disposal also gains nothing from automation. It runs for seconds while you stand at the sink. Automation design covers the general rule against automating loads that can hurt someone. Naming and structure explains how a device ends up in a group nobody meant it to join.

Why air switches exist#

An air switch puts the button at the sink and the electrical switch under it. In InSinkErator's SinkTop brochure, the button "uses air pressure to activate the power module, located under the sink." It "sends a pulse of air down the air tube, triggers the remote switch and activates the disposer." The kit is a corded power module and a 6-foot air tube.

The selling point is placement. A 2016 trade report puts it this way: "Since wall switch access is not necessary, the UL-approved switch is perfect for island installations."

It is not risk free. In March 2018 the CPSC announced a recall of about 1,400,000 single-outlet SinkTop Switches sold from 2005 to October 2017: models 76703, STS-SOSN, 78251 and 74300. "Water can get into the power module, posing a fire hazard." There were 40 reports of overheating damage and no injuries. Check the model on any older air switch.

What to do instead#

1. Keep a plain switch rated for the disposal. If the manual names a rating, as InSinkErator's does at 1 hp, buy that. If it names none, match the disposal's horsepower.
2. Put smart switches on the lights instead. The switch next to the disposal switch is usually a light. Smart switches, dimmers and the neutral wire covers what that box needs, and smart switch box depth and fill whether two smart devices fit.
3. If you install a ZEN75 anyway, keep a disconnect the manual would accept within sight of the sink. Keep the switch out of every scene and voice assistant. It is a Z-Wave device, so it needs a hub such as Home Assistant.

Where this page stops#

• Disposals read: the Badger 5 (product page, 2007 submittal sheet, 2008 manual), a 2013 KitchenAid manual, and the Waste King L-8000 (retailer listing, owner's guide). Newer InSinkErator manuals were not read. Check that yours still carries the 1 hp line.
• Switches read: eight smart wall switches and one smart plug, as their makers or sellers published them in November 2026. The ZEN75 figures come from retailer listings, not a Zooz manual. Ratings change between models, as the D215S to D315S step shows.
• Inrush and jam current are not published for any disposal or switch read here. This page compares published ratings and goes no further.
• Code text is EC&M's quotation and California's Title 8, not the code book. Your jurisdiction may use another edition or local changes.
• Installing any switch is mains electrical work. In the United States it falls under the National Electrical Code as your state and town adopt it, and many places require a permit or a licensed electrician. A renter should leave the disposal switch alone; a smart home for renters covers what needs no wiring. Nothing on this page is an installation instruction.