Timeline for Can I piggyback off a hard-wired dishwasher circuit for a disposal?
Current License: CC BY-SA 4.0
18 events
| when toggle format | what | by | license | comment | |
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| Mar 18, 2020 at 22:05 | comment | added | Harper - Reinstate Monica | @Leforte That is a kitchen receptacle circuit. You can't put disposals on that. Use the purple wire that's already in your under-sink box... see my answer. | |
| Mar 18, 2020 at 20:43 | comment | added | Leforte | Good news. It appears the outlet opposite to the sink is on another circuit. I killed the dishwasher fuse and it still had power. So I’m just gonna draw power off that outlet and make a new. GFI under the sink. | |
| Mar 18, 2020 at 19:16 | comment | added | manassehkatz-Moving 2 Codidact | @Harper-ReinstateMonica True. But when I looked a while back, I found many used (surprisingly) only 10A or 11A. Almost all now have a heater that does double-duty - heat water to sanitary levels and dry the dishes. Except of course they turn off drying when they want to show it as energy-saving :-) But now that I see the detailed pictures, this is a crazy conversation! The wires are in conduit - why not just run another circuit? | |
| Mar 18, 2020 at 18:53 | comment | added | Harper - Reinstate Monica | @manassehkatz-Moving2Codidact It could easily use 15A or the full continuous-load allocation therein (12A), since many dishwashers heat the water. | |
| Mar 18, 2020 at 18:18 | comment | added | Harper - Reinstate Monica | @Leforte No. Bad idea. Least, you can't reset the GFCI without gymnastics, which is itself a codevio. More, it does not account for the purple wire, nor the very good reason somebody swerved way out of their way to fit that thing-you-don't-know-what-it-is. Also this means converting the dishwasher to cord-and-plug-connected, which given its current hookup method, looks super awkward. | |
| Mar 18, 2020 at 18:05 | comment | added | Leforte | I think I'm going to give it a try, I'll change the dishwasher hardwiring to an outlet and install a two outlet 20A GFI for them both on the current power supply for the dishwasher. Does that sound reasonable to you? | |
| Mar 18, 2020 at 17:51 | comment | added | manassehkatz-Moving 2 Codidact | 10A dishwasher load + 6.3A > 15A. | |
| Mar 18, 2020 at 17:51 | comment | added | manassehkatz-Moving 2 Codidact | Wow! Looked it up and the specifications & user manuals both just state "minimum 15A circuit". It almost certainly does not actually use 15A, but how much it does use matters. Practically speaking, if it is a 20A circuit and the 15A for the dishwasher is really more than the dishwasher uses (even just 13.5A) then adding the disposal (6.3A) will stay under 20A plus since the disposal only runs for a few seconds at a time you're fine. However, code may disagree, depending on the actual rated usage of the dishwasher. If it is a 15A circuit then this is likely not a good idea as even.. | |
| Mar 18, 2020 at 17:12 | comment | added | Leforte | @manassehkatz-Moving2Codidact That I'm not sure of. It's the LG LDF5545ST, paired alongside the Insinkerator Badger 5 | |
| Mar 18, 2020 at 17:10 | comment | added | George Anderson | Always good not to "push it to the max" and leave a margin, esp. when you know the loads that will be connected, rather than "I'm given you all she's got, captin! I don't know how much more she can take!" | |
| Mar 18, 2020 at 17:04 | comment | added | HoneyDo | @George Anderson Yeah, I got that. A 20 amp circuit will tolerate more but I'm going by standard wiring protocol of volts x amps x 80%. | |
| Mar 18, 2020 at 16:51 | comment | added | manassehkatz-Moving 2 Codidact | The dishwasher is rated at 15 AMP - Really? Or is it "requires a 15 Amp circuit"? If you're not 100% sure, post the model # and we can (usually) look it up. | |
| Mar 18, 2020 at 16:46 | comment | added | George Anderson | Hey HoneyDo: a 20 amp 120v circuit can handle up to 2,400 watts "for a while". Heating and lighting circuits are considered "continuous loads" and must be derated by 20%, which gets us to 1,920 watts, which I believe is where you got the 1,900 number from. Frankly, a 20 amp circuit breaker will tolerate a bit more than that for a very short period of time (like starting a motor) without tripping. | |
| Mar 18, 2020 at 16:37 | comment | added | Leforte | The dishwasher is rated at 15 AMPs and the Disposal says 6.3 (it's a 1/2 HP). I'll have to investigat if the purple wire is connected to anything in the main fuse box. But how would I run a circuit off this single purple wire? | |
| Mar 18, 2020 at 16:28 | history | edited | isherwood | CC BY-SA 4.0 |
added 1 character in body
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| Mar 18, 2020 at 16:26 | history | undeleted | HoneyDo | ||
| Mar 18, 2020 at 16:25 | history | deleted | HoneyDo | via Vote | |
| Mar 18, 2020 at 16:24 | history | answered | HoneyDo | CC BY-SA 4.0 |