The NEC doesn't specifically address loose microwaves in multifamily dwellings like it does for single-family dwellings. Therefore, the interpretation of whether it needs a dedicated circuit or can be considered part of the small appliance circuits depends on a few factors and, importantly, the local inspector's interpretation.Here's a breakdown of the considerations: NEC doesn't require a dedicated circuit for a non-built-in microwave in a multifamily dwelling. There's no equivalent to the single-family dwelling requirement (210.11(C)(1)) for small appliance branch circuits applying to multifamily dwellings. Overlapping Demand

Can a microwave and a typical small appliance (like a toaster oven, blender, etc) be used at the same time without overloading the small appliance circuit.

Common Sense and Engineering Judgment

The most practical approach is to consider the likely usage. Are the small appliance circuits likely to be heavily loaded already? Is the microwave likely to be used simultaneously with other significant appliances on the same circuit?

Local AHJ (Authority Having Jurisdiction)

This is the MOST important factor. Different inspectors have different interpretations. Always check with your local inspector about their preferred method.

Common Practices


Assume it's a Small Appliance

The microwave is generally assumed to be one of the many small appliances that could be plugged into the required small appliance circuits. However, this is more acceptable if the calculated load on the small appliance circuits is not already close to the circuit's capacity.2.

Add a Dedicated Circuit

It is also acceptable to provide a dedicated circuit if you have concerns about overloading the small appliance circuits, it is a safe and common solution.

In summary



Consult the AHJ

Ask your local electrical inspector before finalizing your plans. Their opinion is the only one that truly matters.

Err on the side of caution

If in doubt, providing a dedicated circuit for the microwave will always be accepted and may prevent future problems. It might be a small cost compared to the potential for nuisance tripping or requiring future rewiring.

Document your assumptions: Clearly document your load calculations and assumptions. This will help if questions arise during inspection.Essentially, there's no hard* code requirement for a dedicated circuit for a non-built-in microwave in a multifamily dwelling, but good design practice, load calculations, and the local inspector's interpretation will dictate the best approach. Flag for review