A Standard is a figure, relationship or dimension that is mandatory, and must be followed to facilitate interchange or interface. The standards “are to establish the broadest correlated set of limiting dimensions, electrical parameters, and communications parameters within which interchange may be assured.”
The following standards are in use within the model railroad community:
S-1 General Overview - (4/2021)
RP-1 RP-1 Abbreviations - (4/2021)
S-1.1 General - Proto Scales - (7/2009)
S-1.2 General - Standard Scales - (7/2009)
S-1.3 General - Scales with Deep Flanges - (7/2009)
S-1.1 General - Proto Scales - (7/2009)
S-1.2 General - Standard Scales - (7/2009)
S-1.3 General - Scales with Deep Flanges - (7/2009)
S-2 Couplers - (7/2010)
S-3 Trackwork
S-3.1 Trackwork - Proto Scales (1/2006)
TN 3.1 PROTO:SCALE AND FINE SCALE GUIDE - (11/22/2005)**
S-3.2 Trackwork - Standard Scales - (2/24/2010)
S-3.3 Trackwork - Deep Flanges - (2/24/2010)
TN 3.1 PROTO:SCALE AND FINE SCALE GUIDE - (11/22/2005)**
S-3.2 Trackwork - Standard Scales - (2/24/2010)
S-3.3 Trackwork - Deep Flanges - (2/24/2010)
S-4 Wheels
S-4.1 Wheels - Proto Scales - (1/2006)
TN 4.1 PROTO:SCALE AND FIND SCALE GUIDE - (11/22/2005)**
S-4.2 Wheels - Standard Scales - (01/2019)
S-4.3 Wheels with Deep Flanges - (2/2010)
TN 4.1 PROTO:SCALE AND FIND SCALE GUIDE - (11/22/2005)**
S-4.2 Wheels - Standard Scales - (01/2019)
S-4.3 Wheels with Deep Flanges - (2/2010)
S-5 S-5 TRACTION Power Collection - (8/1982)
S-9 S-9 ELECTRICAL - (Jan 2025)
TN-9 Wiring for DC and DCC (12/30/2023 Revised)
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