Manufacturer:
Product Model #:
Model Description:
Product Link on Website:
Kit RTR Scale & Gage Scale & Gage. (other not in drop down list)

Inspection Date:	Click here to enter a date.
Inspector’s Name:
Inspector’s Phone:
Inspector’s NMRA #:
Inspector’s Email:

Manufacturer Rep. Name:
Manufacturer Name:
Address 1:
Address 2:
City:	State/Province:
Country:	Zip code:
Telephone:	FAX:
Email:

1) Basic Data

1A) Type of Locomotive (select one) and Loco Length
Click here Loco Type. Other:
Loco (in scale feet)	Length	Width	Height
Prototype
Model
Notes:

1B) Prototype Representation

Is this model a reasonable representation of the prototype? Yes No
1C) Model Characteristics
Painted? Yes No
Primary Construction Material?
Material Other Not Listed:

2) S-2 Couplers

Check where any couplers are installed on the model? Couplers.

Type of coupler:

Does model have metal couplers? Front Back

If model has metal coupler, check if couplers are insulated from rest of model? Front Back

Measurement from top of rail to center of coupler Front Back

Are couplers at correct height?	Front: Yes No	Rear: Yes No

Compare measurements to current applicable S-2 on NMRA.ORG Identify gauge or tool used to check coupler height:

Notes S-2:

3) S-4 Wheels

Does the model include wheel sets?	: Yes No

If yes, indicate applicable wheel standard: Choose one.

If wheels are metal, are they insulated from the axles? One Both

S-4 Wheel Dimensions

Measurements (inches/mm) / Axles	Check gage (K)	Back to Back (B)	Wheel Width (N)	Flange Depth (D)	Flange Width (T)	Wheel Gauge (K+T)
1
2
3
4
5
6
7
8
9
10
11
12

*Measurements should be taken to nearest 0.001”/0.0025mm or better.

Notes S-4:

Compare measurements above to target +/- for the applicable S-4.x on NMRA.ORG

Measurements for this model	Pass: Yes No

4) S-9 Electrical

Is this a model that utilizes power from the rails? Yes No For what?

If this model utilizes power through the rails, complete the table below:

S-9
Power Source	Supported	Vmin	Vmax	Vmax Tested
AC	Yes	No	N/A	12v	OK
DC	Yes	No	N/A	12v	OK
DCC	Yes	No	Vmin & Vmax tested by decoder test team.
Notes S-9 S-9.1 S-9.2:

Standard S-9 Electrical and associated Recommended Practices make reference to “Right Hand Rail”. The term “Right Hand Rail” means the rail to the right of the observer standing between the rails with his/her back to the front of the locomotive.

If a decoder is used to control the devices in the model, the decoder should be checked separately for conformance by the DCC decoder test team. Find the decoder brand and model, check the list of Conformance Warrants issued. If the decoder used has been issued a Conformance Warrant proceed to step 4A below. If not, contact the Manager Conformance &Inspection Department for more information on having the decoder tested by one of our volunteers specializing in testing decoders for conformance.

If the model is not equipped with a decoder from the factory proceed to step4B below.

4A) DCC Decoder Test

Test	Procedure	Expected Result	Pass or Fail
DCC Test	Make note of the decoder Used (Manufacturer and Model) Search NMRA.ORG for a Conformance Warrant issued for the decoder. Note the Conformance Warrant # Turn on the DCC system and instruct the locomotive to move forward.	Locomotive should move in the direction the manufacturer desires to be the forward direction.	Choose an item.
The decoder should be able to independently control FL(f), FL(r) and F1-Fn. If it exist, turn on FL(f) (also known as F0(f) or forward headlight).	If it exist, the desired forward headlight as specified by the manufacturer should illuminate.	Choose an item.
Instruct the locomotive to move backward and turn on FL(r) if it exist (also known as F0(r) )	If it exist, the desired rear headlight as specified by the manufacturer should illuminate and the locomotive should move backward.	Choose an item.
If F1 exist, turn on F1	The extra function, if it exist, should turn on.	Choose an item.
If F2 exist, turn on F2	The extra function, if it exist, should turn on.
Continue to test F3-Fn for as many output functions as there are.	The extra functions, if they exists, should turn on.
Analog Decoder Test	Make sure the analog mode is enabled in CV29, bit 2 =1. Place the locomotive with decoder installed on an analog powered (DC) track with positive voltage on the right hand rail.	Locomotive should move away from tester and the headlight in the direction of travel (if it exist) should be lit.	Choose an item.

4B) DCC Interface Socket Test

If the locomotive is not supplied with a factory installed DCC decoder and it has an approved interface connector listed below, please complete this section, section 4C below then complete 4A above.

S-9.1.1 provides recommended specifications for Electrical Interfaces (referred to as Interfaces in this document) that are sockets or plugs. The Standard provides for 4 different Socket Interfaces (JST-9, PluX22, 21MTC or NEXT18). Please indicate if this locomotive contains any of these Interfaces:

Locomotives Includes: Choose one	Packaging includes Pictogram for selected socket above? ☐

Locomotives providing a Socket Interface may offer a basic service interface with the minimum connections, or may offer an extended service interface with additional connections. For those providing an extended interface, the locomotive manufacturer should provide documentation that clearly shows which connection is wired to which built-in equipment. In addition, the manufacturer’s extended interface should be designed in such a way that it is possible to insert a basic service plug only in those socket holes corresponding to the basic service socket. If the locomotive includes a socket interface, complete the section below:

Is Pin 1 on the Interface socket clearly marked (e.g. triangle, number 1, or keyed such that a decoder cannot be installed incorrectly etc.)? Yes No

If an Extended Interface is included:

a)	Does the manufacturer include documentation indicating what built-in equipment is connected to each pin on the extended interface? Yes No

b)	Does the manufacturer’s socket allow a basic service interface to be connected? Yes No

If Yes, how?

c)	Does the manufacturer clearly mark the basic interface pins on extended interface other than by the indication of Pin 1 (e.g. a box around the basic interface socket holes)? Yes No

4C) DC Analog Test

If the locomotive is DC or has a socket Interface with shorting (dummy) plug installed, complete the appropriate Test below. Otherwise skip this section.

For these next checks, please connect a DC model railroad power pack to a short section of track. If the Power Pack has both DC and AC terminals, ensure that you connect the variable DC terminals of the power pack to the rail. Also be certain that you can identify to which rail the positive (+) potential is connected.

Identify Power Pack used (Manufacturer & Model #):

Test	Procedure	Expected Result	Pass or Fail
Analog Test (forward)	Place the locomotive with shorting plug installed on a section of analog powered (DC) track with positive voltage on the right hand rail	Locomotive should move away from the tester and headlight in the direction of travel (if it exists) should be lit.	Choose an item.
Analog Test (reverse)	Place the locomotive with shorting plug installed on a section of analog powered (DC) track with positive voltage on the left hand rail	Locomotive should move toward the tester and headlight in the direction of travel (if it exists) should be lit.	Choose an item.

4D S-9.1.1 Electrical Interface & Wire Color Code

S-9.1.1 provides recommended color assignments for manufacturers of model locomotives that use wires to connect power pickups to loads (motors and/or lights). Certain of these are applicable to all locomotives while others are applicable if the locomotive includes certain features. Remove the shell of the locomotive and complete the checklist below. Compare your findings to S-9.1.1 at NMRA.ORG

Does the locomotive use wires in the connection of the power pickup to loads? Yes No

If a locomotive is factory equipped with a decoder or a socket as described in S-9.1.1, the color of the wires does not count for or against receipt of a Conformance Warrant.

S-9.1.1 Color	Wire Connection Exists in Loco (Y or N)	If Exists, Color used in Locomotive	Matches S-9.1.1
From Right Hand Rail power pickup to motor or interface	Red	Yes No	Yes
From Interface to Motor (+)	Orange	Yes No	Yes
From Left Hand Rail power pickup to motor or interface	Black	Yes No	Yes
From Interface to Motor (-)	Gray	Yes No	Yes
Front Headlight(s) Power Sink	White	Yes No	Yes
Rear headlights(s) Power Sink	Yellow	Yes No	Yes
Speaker + & -	Violet or Brown	Yes No	Yes
Output 3 (Aux1)	Green	Yes No	Yes
Output 4 (Aux2)	Brown or Violet3	Yes No	Yes
Output 5 (Aux3)	Not Defined	Yes No	Yes
Output 6 (Aux4)	Not Defined4	Yes No	Yes
Output 7 (Aux5)	Not Defined	Yes No	Yes
Output 8 (Aux6)	Not Defined4	Yes No	Yes
Common (+) headlight(s)/output(s) power source	Blue	Yes No	Yes
Common (-) power sink or decoder ground	Black w/ White Stripe	Yes No	Yes
Notes S-9.1.1:

The RPs below do not impact the awarding of an NMRA Warrant. However, please take the measurements and report.

5) RP-7 Clearance

RP-7 Clearances provides guidance on clearances for cars and locomotives. The silhouette of a clearance gauge actually checks for clearances of structures, bridges, tunnels and platforms based on AAR data. The RP-2 Clearance Gauge, whether incorporated into the NMRA Standards Gauge (Type I) or a separate stand-alone Clearance Gauge; it is suitable for use to check most rolling stock. For modern cars such as double-stacks and tri-level auto carriers use the plastic modern clearance gauge attached to the Type I gauge. RP-7 Clearances are intended for tangent (straight) track and/or very broad curves.

Will model pass unobstructed through the area specified by the RP-2 Clearance Gauge for this scale? Yes No

Identify gauge and version used for this check:

Notes RP-7

6) RP-25 Wheel Contour

RP-25 provides for a recommended wheel contour for optimum track holding ability and most prototypical appearance within the interchange limits of Standard S-4.

Compare your measurements to current applicable RP-25 at NMRA.ORG Does this manufacturer claim on their packaging and/or documentation or other published materials that this model’s wheels have RP-25 wheel Contours? Yes No

Wheel width: Code	Measurements should be taken to nearest 0.001”/0.0025mm or better.

RP-25 Measurements (inches/mm)
Axles	Tire Width (N’)	Flange Width (T’)	Tread Width (W’)	Flange Depth (D’)	Gaging Point (P)	FilletR1	InnerR2	OuterR3
1
2
3
4
5
6
7
8
9
10
11
12

Measurements for this model	Pass: Yes No

Notes RP-25:

7) Additional Notes:

Notes

This model Passes or does not pass applicable NMRA Standards.

I certify that I inspected the model indicated, and accurately recorded the results of my inspection on this document.

Inspector’s Signature:
Manager, NMRA Conformance & Inspection

Warrant of Conformance Issued Number:

History

Document created 2017 by D.A. Voss

November 24, 2022 removed table of wheel dimensions and referred Inspectors to compare measured values to current applicable S-4 published on NMRA.ORG requires all dimensional measurements to be taken to within +/- 0.001”/0.0025mm. Added drop down pick list to replace multiple check boxes. Streamlined S-2 coupler test questions. Removed references to 4, 6 and 8 pin sockets as they are no longer recommended for new designs. Streamlined the electrical test procedures. Other error corrections and formatting improvements. By J.M. Juett

November 26, 2023, added field for link to product on manufacturer’s website. Added more spaces to Fax number and email address fields. Modified drop down list for more clarity. Moved positions of Flange Depth (D) and Width (T) to mirror the tables in S-4.x. By JM Juett.

Previously some manufacturers used brown, others violet prior to a defined Standard color. Manufacturer may use either color but must clearly document in their installation instructions.

Manufacturer may use any colors or other means to identify each wire such as a tag but each wire must be identifiable and this must be documented in the installation instructions. Black, red, orange, gray or blue of the same shade as the power common may only be used as defined in this table.