Recent comments in /f/DIY

dominus_aranearum t1_iy90q3b wrote

>As to you wiring, you don't need to run the 12-3 wire to the switch, just wrap the ends of the white wire (that you have capped on both end) with black tape and use it.

No longer up to code. All switches must have a neutral.

While it will technically work, might as well wire it properly if it's being done at all.

Switches with lighting loads now require the neutral. Wouldn't apply in OP's case.

Edit: I was wrong. 404.2(C)(7)

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roobinsteen t1_iy90mo2 wrote

Technically neutrals are required in every switchbox now, but if I were in your position I would just do it as described, creating a switch loop. The only reason the requirement for neutrals was codified was so that smart switches would be able to be installed everywhere (smart switches typically require neutrals). It's not for safety, that's the only reason. I don't imagine you or anyone will install a smart switch for you garbage disposal unit.

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roobinsteen t1_iy8zt41 wrote

Whoever says they must be on separate circuits is wrong (see my answer above). Here's all that's required: Dishwasher cannot share circuit with any countertop circuits (aka SABCs), and must be a 20A if sharing with a disposal (this point is not said explicitly, but is implicit via general guidelines about sizing circuits for the amperage required by the appliances using them). Relevant NEC article is 210.52

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roobinsteen t1_iy8y13a wrote

> https://homeefficiencyguide.com/should-dishwasher-be-on-its-own-circuit/

There is a LOT of nonsense in that article. I do not think it was written by anyone who knows about typical residential wiring or the NEC. It is absolutely not correct that a dishwasher must be on it's own circuit. It is common and completely code acceptable for a dishwasher to share a 20A circuit with a garbage disposal. The only thing to abide by in terms of code is that the circuit serving the dishwasher must not be on one of the countertop circuits (also known as Small Appliance Branch Circuits/SABCs). The relevant portion of the NEC code is 210.52.

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TonyFugginMontana OP t1_iy8wokt wrote

Thanks for responding. Yeah, I've heard that both need to be on separate 15A lines, but there seems to be a lot of conflicting information on this, tbh. Some say it's fine to have disposal and dishwasher on the same circuit if it's 20A, which mine is. No one really cites to the code itself, though, so I may have to dig deeper into this for an answer.

They were definitely lazy and cheap with everything in this house, but I mean, I kinda am too... Putting in a new circuit would probably be beyond my DIY limits so I'd rather avoid it.

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TonyFugginMontana OP t1_iy8w1a7 wrote

Thanks for responding. Yeah, the plan would be to add plugs to both dishwasher and disposal. As far as the advantage? Beats me, but Home Depot seems to have expected to be able to simply plug in the dishwasher, and the fact they couldn't is one of the reasons I'm installing it myself now, lol. I also just want to be as close to code compliant as possible.

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>As to you wiring, you don't need to run the 12-3 wire to the switch, just wrap the ends of the white wire (that you have capped on both end) with black tape and use it.

I've seen tutorials showing that way, but then I've also seen some say that the new NEC updates for 2018(?) made it a requirement to use 12-3 and include a capped neutral... for whatever reason.

Anyway, if this is the case...

>The box inside the old dishwasher is a valid junction box.

I think that's what I need to hear. If the disposal line can just be spliced in at the junction box inside the dishwasher, the way it was before, without any safety or compliance issues, I would definitely prefer to just do that.

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metarchaeon t1_iy8sj5n wrote

Are you planning on adding plugs to both the new dishwasher and the disposal? I'm not sure what the advantage is over hardwired. The box inside the old dishwasher is a valid junction box.

As to you wiring, you don't need to run the 12-3 wire to the switch, just wrap the ends of the white wire (that you have capped on both end) with black tape and use it.

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codin_godin t1_iy8qcsv wrote

I understand the concern. We ripped up a carpet that was there previously because of the water damage (hence drain tile lol), so we are fine not doing carpet. The carpet tiles were mentioned as an option because they are a vinyl product, not like normal carpet. Could be lifted up and replaced if one of the tiles had some damage.

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