You're on the right track with distribution systems/wiring types, but the key is understanding how Revit interprets the load. Here's a breakdown of the problem and how to fix it, along with potential troubleshooting steps

Why the Neutral is Showing Up:

Revit assumes every load needs a neutral unless specifically told otherwise. The fact that you're feeding a transformer's primary doesn't automatically make it a 2-wire connection. Revit needs to know it's only using two wires.

Solution: Change the Electrical Equipment Family

This is the most reliable method. You need to adjust the electrical equipment family representing the transformer. Here's the process:1. Edit Family

Select the transformer in your model, and click "Edit Family" from the ribbon.2.

Connector Properties

Select the primary-side electrical connector on the transformer family. Look in the Properties palette. Pay attention to these parameters:

Pole Number

This is critical. This is what Revit uses to determine how many wires it thinks are required. This needs to be set appropriately for your system.

For a simple 2-wire, single-phase transformer primary (e.g., 120V or 240V)

Set this to `2`.

For a 3-wire, single-phase transformer primary (e.g., 120/240V split-phase)

Set this to `3`. (Less common, but included for completeness)

For a 3-phase transformer primary

Set this to `3` (without a neutral) or `4` (with a neutral). The key here is the distribution system.

Number of Poles

In older versions of Revit, you might see `Number of Poles` instead of `Pole Number`. It should also reflect the number of conductors.

Distribution System

This is very important. Select a 2-wire or 3-wire distribution system from the dropdown that matches your intended configuration without a neutral. Examples: `240V 1 Phase 2 Wire` or `480V 3 Phase 3 Wire`

Wiring Type

Select a wiring type appropriate for the voltage and current you're dealing with. This typically doesn't directly influence the neutral showing up, but it's good practice to set it correctly.3.

Load Classification (Optional but Recommended)

Look for a parameter called "Load Classification." While it doesn't directly control the neutral showing up, classifying the transformer load (e.g., "Transformer Primary") can help with reporting and energy analysis.4.

Save and Load into Project

Save the modified transformer family. Load it back into your Revit project, and overwrite the existing version.

Important Considerations



Check the Panel Schedule Template

Sometimes, the panel schedule template itself is configured to always show a neutral column. While less likely, it's worth verifying. Edit the panel schedule template and check its column visibility settings.

System Browser Verification

After making the changes, use the System Browser to inspect the electrical system connected to the transformer. Ensure the System Browser accurately reflects the 2-wire/3-wire configuration.

Revit Version Differences

The exact names of parameters and the user interface might vary slightly depending on your Revit version. The core principles remain the same.

Troubleshooting Steps


Reload Family

If you've already tried editing the family, completely reload the family. Sometimes Revit gets "stuck." Go to the "Insert" tab, "Load Family," and select the modified transformer family. Overwrite the existing version.2.

Restart Revit

Sometimes a Revit restart is needed for changes to fully propagate.3.

Check Connectors

Visually inspect the connector on the transformer family in the Family Editor. Ensure it's properly placed and configured.4.

Double-Check Distribution System

Make absolutely sure the distribution system assigned to the connector in the transformer family does not* include a neutral wire in its description (e.g., avoid "120/240V 1 Phase 3 Wire with Neutral").5.

New Project Test

Create a brand-new Revit project and load the modified transformer family into it. Connect it to a panel and see if the neutral shows up. This helps isolate whether the problem is with the family or with your existing project.6.

Verify Circuit Wiring

Select the circuit connected to the transformer's primary in the panel schedule. Check its properties. Ensure that its "Wires" parameter matches the expected 2-wire or 3-wire count.

In summary, the most important step is editing the transformer family and setting the "Pole Number" and "Distribution System" of the primary-side electrical connector correctly. This is how you directly tell Revit that the circuit only requires two or three wires, and therefore a neutral shouldn't be included. Good luck! Let me know if you have more questions. Flag for review