Here are a few of what I believe to be the most important NEM standards listed.
You can see a detailed list of the NEM standards at www.morop.eu.
|Symbols for characteristics of the model vehicles||NEM006|
|Standards, nominal sizes, gauges||NEM010|
|Delimitation of the clear space with with a straight track||NEM102|
|Delimitation of the clear space in the arch||NEM103|
|Delimitation of the clear space for narrow gauge railroads||NEM104|
|Elevation of the track curve||NEM114|
|Roadbed Profile for standart gauge||NEM122|
|Roadbed Profile for narrow gauge railroads||NEM123|
|Power Wire location||NEM201|
|Wire Cross-Section, Conductor Lengths||NEM604|
|Layout Wiring Identification of electrical conductors||NEM605|