Thank you for your interest in the NMRA's Digital Command Control (DCC) Standards and Recommended Practices. The standards can now be found along with the rest of the NMRA's standards at NMRA STANDARDS AND RECOMMENDED PRACTICES under S-9 Electrical.
These documents supersede all previous versions.
If you need additional information or wish to make further inquires regarding NMRA DCC, please contact the NMRA Standards & Conformance Department at tech-chair [at] nmra.org.
DCC (Stds) Manager
National Model Railroad Association
Department #635
P.O. BOX 1328, SODDY DAISY, TN 37384-1328
Phone +1.423.892.2846
Fax +1.423.899.4869