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Premium Member
4,854 Posts
Hi Rayl and welcome to the MRF.

The general consensus here on the MRF re. DCC wire sizes would seem to be as follows:-

Main DCC Bus - 32 x 0.2mm wired as a radial bus from the controller/power source.

Droppers from track to DCC Bus - Over 300 mm distance - 16 x 0.2mm
Less than 300mm distance - 7 x 0.2mm is adequate.

If you are planning electromagnets for auto-uncoupling the wiring should, as a minimum, be 16 x 0.2mm.

Hope this helps.
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