A typical kitchen requires several electrical circuits. While bedrooms or family rooms are commonly served by a single, standard lighting circuit, a modern kitchen is likely to have about seven circuits due to its hardwired electrical appliances. Here is a list of the most commonly used circuits in a kitchen.
A modern refrigerator requires a dedicated 20-amp, 120/125-volt circuit. 12/2 NM wire with a ground is required for the wiring.
If you’ve sought an appliance contractor for oven installation in Washington, D.C., you likely know that an electric range will need a dedicated 240/250-volt, 50-amp circuit. This means you’ll need to install a 6/3 NM cable (or #6 THHN wire in a conduit) to feed the range. However, a gas range will only require a 120/125-volt receptacle to feed the range.
A dishwasher circuit should be a dedicated 120/125-volt, 15-amp circuit. It is fed with a 14/2 NM wire with a ground.
A microwave oven needs a dedicated 20-amp, 120/125-volt circuit to feed it. This will require 12/2 NM wire with a ground.
Above your countertop, you will need two dedicated 20-amp, 120/125-volt circuits to run your small appliance loads (toasters, blenders, coffee pots, etc.).
A dedicated 15-amp circuit is required for a garbage disposal. It is fed by a 14/2 NM cable with a ground.
A 15-amp, 120/125-volt dedicated circuit is required to power the ceiling fixtures, under-cabinet fixtures, and track lights (if you have them).