THE BIT TO REMEMBER
A DCC conversion is a model-by-model and layout-by-layout decision, not an all-or-nothing purchase.
List what you own
Record each locomotive as DC, DCC Ready, DCC Fitted or unknown. DCC Ready means a decoder can be fitted using the provided interface; it does not mean the model already has one.
Check each locomotive
Socket type, motor isolation, available space and current requirements vary. Older models may need additional work and are not always economical to convert. Use the exact service sheet and decoder instructions.
Review the layout separately
DCC and DC controller outputs must never be connected to the same track at the same time. Existing sections may remain useful, but point wiring, feeds and reversing arrangements need checking against the DCC system instructions.
Start with a test track
Learn the chosen DCC system with one correctly fitted locomotive. Keep your DC controller for unconverted stock on a physically or electrically separate track.
A REAL-WORLD EXAMPLE
Keep the main collection on DC while one suitable DCC Ready model is professionally fitted and tested on a separate DCC track. Record the decoder and address before expanding.
Your next step
- Inventory each locomotive’s control and socket status.
- Choose one straightforward model for the first conversion.
- Have uncertain motor isolation or wiring checked professionally.
- Keep DC and DCC outputs completely separate.
Read the original instructions
Reviewed 7 October 2026. These beginner notes do not replace the instructions for your exact model.
Hornby · Introduction to DCC ↗ESU · Digital decoder installation manuals ↗