NGMRSC dictionary
| Term | Definition |
|---|---|
| DC | Direct current model railway electrical supply and control system. See Frogs and point wiring. |
| DCC | Digital Command Control model railway electrical supply and control system. See Frogs and point wiring. |
| Electrofrog | PECO point category that has a metal conducting frog. See Frogs and point wiring. |
| Gauge |
Distance between rails. NGMRSC offers track in 9 mm, 10.5 mm, and 12 mm gauges. |
| HOm | HO (1:87) scale, 12 mm gauge track system representing metre or similar narrow gauge track |
| HOn3 | HO (1:87) scale, 9 mm gauge track system representing 2'6" or similar narrow gauge track. (See HOe. PECO offer one product range serving OO9, HOn30, and HOe.) |
| HOn30 | HO (1:87) scale, 10.5 mm gauge track system representing 30" or similar narrow gauge track. |
| Insulfrog | PECO point category that has a plastic non-conducting frog. See Frogs and point wiring. |
| HOe | HO (1:87) scale, 9 mm gauge track system representing 2'6" or similar narrow gauge track. (See HOn3. PECO offer one product range serving OO9, HOn30, and HOe.) |
| OO9 | OO (1:76) scale, 9 mm gauge track system representing 2'3" or similar narrow gauge track. (PECO offer one product range serving OO9, HOn30, and HOe.) |
| Point | Special track configuration that directs traffic to or from either of (usually) two routes. (North American: 'switch' or 'turnout'.) |
| Scale | Ratio of model railway dimensions to corresponding prototype dimensions. OO scale is 1:76. HO scale is 1:87. |
| Sleeper | Transverse fixture supporting and maintaining separation of rails. (North American: 'tie'.) Model railway sleepers are usually molded plastic and may show simulated wood grain. |
| Unifrog | PECO point category that has an isolated metal conducting frog. See Frogs and point wiring. |