How to set up DCC power districts with boosters
Split your layout into electrically separate power districts, each with its own booster, so you can run more trains and a short in one area doesn't stop everything.
- Time
- 1 day
- Difficulty
- Medium
- Cost
- Higher cost
- Steps
- 8
- Checked
What you’ll need
- Additional booster(s) and power supplies compatible with your command station
- Insulated rail joiners or a razor saw Search Amazon for razor saw model railway
- Bus wire Search Amazon for 16 AWG wire red black
- Control bus cables for your system (e.g. LocoNet cables)
- Multimeter Search Amazon for digital multimeter
As an Amazon Associate we earn from qualifying purchases. The Amazon links go to search results, so you can compare what’s available.
Before you start
- Don't short either track output to ground (Digitrax).
- Power off before cutting gaps or rewiring.
Step by step
-
Step 1: Know why you'd want districts
Digitrax gives two reasons: more power for more locos (a 5 A booster runs roughly 10–15 average N or 6–10 HO locos) and limiting short circuits – if one district shorts, only that area stops. Districts are for power distribution, not train control like DC blocks.
Next: step 2 -
Step 2: Plan the districts
Split along natural boundaries: main line, yard, branch. Avoid boundaries where trains stop.
Next: step 3 -
Step 3: Gap both rails between districts
Digitrax: double-gap (both rails) at each end of a district. Sub-districts within one district (for short management or auto-reversing) are single-gapped and fed via a power manager.
Next: step 4 -
Step 4: Connect a booster and supply to each district
Each district gets its own booster and power supply. Make sure each booster is set up as a booster, not as a command station – Digitrax says this simple mistake causes problems on modular layouts.
Next: step 5 -
Step 5: Keep track phasing the same
Connect Rail A and Rail B of every booster to the same rails throughout (for example A to the left rail everywhere). Otherwise locos short when crossing between districts (Digitrax).
Next: step 6 -
Step 6: Link the boosters to the command station
Connect each booster to the command station's control bus – LocoNet for Digitrax.
Next: step 7 -
Step 7: Choose the wiring method for detection
Digitrax strongly recommends direct home wiring, with each district and booster electrically isolated; common-rail layouts need opto-isolated boosters.
Next: step 8 -
Step 8: Test
Run a loco slowly across every district boundary in both directions, then coin-test each district.
Tips
- Digitrax DCS240-type units are command station plus booster in one; adding a separate booster is the usual expansion.
- Note on your plan which booster feeds which district.
Questions people ask
Do I need districts on a small layout?
Often not. Digitrax says that unless you need more power, the only gaps you need are for hard shorts such as reverse loops and live frogs.
Can I mix booster brands?
Check both manuals – boosters must accept your command station's signal and share compatible wiring.
Sources
Checked 18 October 2026. We wrote this guide in our own words, using:
- Digitrax DCS240 command station manual (digitrax.com)
- Digitrax BDL168 occupancy detector manual (digitrax.com)
- Digitrax LocoNet overview application note (digitrax.com)
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Printed from dcctrainautomation.uk/guides/set-up-power-districts-with-boosters/ · Checked 18 October 2026 · General information only. Follow the maker’s instructions for your own equipment, and keep mains wiring inside properly made, enclosed power supplies.