Okay, let's break down using 14-3 Romex for a 3-way switch setup, specifically addressing your questions about using the white wire as a hot and the need for a neutral.

Understanding the Basics of 3-Way Switches

First, a quick review: 3-way switches don't actually have "on" and "off" positions in the traditional sense. They have two "traveler" terminals that can be connected to the common terminal in different configurations. This allows you to control a light from two different locations.

Using White Wire as a Hot (Code Considerations) Legal, but MUST be Remarked

You can use the white wire of a 14-3 cable as a hot conductor in a 3-way switch circuit.

However, NEC (National Electrical Code) requires that you clearly and permanently re-identify the white wire as a hot conductor at both ends. This is typically done with black or red electrical tape or a permanent marker. The best practice is to use a RED marker or tape. NEVER leave a white wire as a hot without re-identifying it. Why is this important? To prevent future electricians (or yourself!) from accidentally assuming the wire is a neutral and creating a dangerous situation.

Your Specific Scenario and Questions Phase Black, White as Hot for 3-Way

This is a fairly common practice. You use the black wire for the feed (power in) or the switched output (power to the light), and the white and red wires as the travelers between the switches. Remember to mark the white wire appropriately!



No Neutral Needed at 3-Way Switch Box (Generally True for Standard 3-Ways)

You are correct. Traditional 3-way switch circuits do not require a neutral at the switch box. The power comes in, is switched between the travelers, and goes to the light. The neutral is connected at the light fixture.

Hallway, Another Switch with Neutral for Dimming

This is relevant.

Important

If you are planning to replace one of the existing standard 3-way switches with a smart dimmer or a dimmer with indicator lights,

you WILL likely need a neutral at that switch box. Smart dimmers and some other types of dimmers often require a neutral to power their internal electronics.

Your Situation

If the other switch (the one with the neutral) is the only one that might need a neutral in the future for dimming (smart dimmer, etc.), you're probably fine leaving your 14-3 setup as is.

Summary and Recommendations1.

You can use the white wire as a hot in a 3-way switch circuit, but you MUST re-identify it at both ends with black or red tape/marker.2.

Standard 3-way switch circuits do not require a neutral at the switch box.3.

If you are going to use smart dimmers or dimmers that require neutral now or in the future, pull a 14/3 with neutral. (14-3-N) You can always choose to not use the neutral, but at least it will be there for future use.4.

Consider Future-Proofing

Even though you don't need a neutral now, running a 14-3 with a neutral (14-3-N) is often a good idea for future flexibility. It's not much more expensive, and it gives you the option to easily install a smart dimmer or other device later on.

Important Safety Notes



Turn off the power at the breaker before working on any electrical wiring.

If you are not comfortable working with electricity, hire a qualified electrician. Electrical work can be dangerous and must be done according to local codes.

Always double-check your wiring connections before restoring power.

Use a voltage tester to verify that the power is off before touching any wires.

Consult your local electrical codes for specific requirements in your area.

Before you proceed, please confirm the type of dimmer you plan to use in the future. If it requires a neutral, you MUST run a new cable with a neutral wire now.Disclaimer: I am an AI chatbot and cannot provide professional electrical advice. This information is for general guidance only. Always consult with a qualified electrician for any electrical work. Flag for review