The AI answer is partially correct but needs more context and clarification. Here's the breakdown of whether a single 20-amp bathroom branch circuit can serve both receptacles and lighting outlets in a dwelling unit bathroom, according to the 2023 NEC

Yes, it is generally permitted, but with important caveats.

Here's why: 210.11(C)(3) Bathroom Branch Circuits States that a 20-ampere branch circuit shall supply the bathroom receptacle outlet(s). These circuits shall have no other outlets. 210.23(A) (20A Branch Circuits): permits both luminaires( lighting) and receptacles to be supplied.

Caveats and Considerations



Bathroom Receptacle Requirement is Key

The 20-ampere bathroom branch circuit is primarily for the receptacle(s) in the bathroom. It is not permitted to have any other outlets that are outside of the specific bathroom that the 20 amp bath circuit is dedicated to serving.

Total Load Calculation

You must ensure that the total load of all the lighting fixtures, and any other permissible items connected to that circuit does not exceed the circuit's capacity. Overloading a circuit is a fire hazard.

GFCI Protection

All receptacles in a bathroom must be GFCI protected (210.8(A)(1)). Lighting outlets in specific locations might also require GFCI protection, depending on local interpretations and specific conditions.

Arc-Fault Circuit-Interrupter (AFCI) Protection

Dwelling unit branch circuits that supply 120-volt, single-phase, 15- and 20-ampere outlets installed in dwelling units shall be protected by an AFCI (210.12(A)).

In summary

While a single 20-amp bathroom circuit can serve both receptacles and lighting within a single bathroom, it's crucial to ensure:1. The primary purpose of the circuit is to feed the bathroom receptacles.
2. The total load (receptacles + lighting + other) doesn't exceed the circuit's rating.3. GFCI protection is provided for receptacles (and possibly lighting, depending on location).
4. AFCI protection is provided for the circuit.

Important Note: Always consult the latest edition of the NEC and local amendments, and consult with a qualified electrician for any electrical work. Electrical codes can be complex, and misinterpretations can lead to unsafe installations. Flag for review