What's the best way to hard wire a dishwasher and garbage disposal? The previous owners ran romex through a piece of 1/2" flex conduit and secured the end of it inside the Sheetrock, basically just using it as a sleeve for the romex as it exits the wall. Is this method ok? Or can I just run the romex out the wall into the appliances like with the microwave/range hood?
Normally, microwave / range hood is cord-and-plug connected to a receptacle mounted inside the cabinet above it.
Or would it be better to install a metal switch box for the disposal and break out the two circuits to the dishwasher and disposal in the flex conduit stuff directly? This would of course mean more work, but I have the wall open right now.
It's better to keep it simple as possible. The flex might have been sleeved over the NM cable just to protect it from the finishers during construction, and then the electrician never hooked up the DW or disposal for whatever reason. MAybe some appliance delivery guys did...
They had practically ALL the outlets in the kitchen wired off one 20 amp circuit with the other circuit feeding the dining room outlets. Fridge was also on the same circuit as the kitchen countertop outlets.
This was code then and it is compliant now. You get 2 20a small appliance circuits in a kitchen / diningroom/ and similar areas. (Pantry, breakfast nook...) These circuits are for countertop receptacles, wall recepttacles, and NOT for any permanent or non-cord & plug connected appliances and yes, the fridge on these circuits is OK.
Range hood was wired off the master bedroom outlets.
100% correct and to code. Range hood can NOT be on the 20a SABC's and it is usually put on the closest 15 ampere lighting and convenience outlet circuit.
Now I am running 2 circuits for just the counter top outlets, one for the microwave, and one for the fridge. Then the dishwasher and disposal were already on their own circuits, and lights on another.
I just want you to know the electrical in your kitchen was not messed up liike you thought.