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TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Trailer detailsApplicant Name:VIN / Unique Identifier:Category (O1,O2,O3,O4):Trailer description (e.g. semi-trailer, drawbar, etc…)Name of ATC:Name of ATC tester:ATC contact details Ph: Email:Location of ATC test:Trailer dimensions (Length):Trailer dimensions (width):Trailer dimensions (Height):
Note to ATC Inspector:
The trailer should already at this point of inspection been measured for masses and dimensions. Record this dimensional data above as this may have a bearing on required lamps/reflectors to be fitted. Identify each kind of lamp and reflector evident on the trailer and complete the relevant section below. Some sections may not be applicable based on the trailers dimensions. Definitions at the bottom of this page help explain measuring location. The requirement for each lamp/reflector is contained in the green section of each table. On the left side of each table, record all the details of the e-mark and number and characteristic letter as on the lamp. The letter/character on the lamp identifies its function. The letter/character that identifies the function can be seen in the green section of table under “presence”. For example, the letters “AR” on the lamp indicates it has a reversing lamp function. The letter “L” on the lamp indicates its rear registration plate lamp function. Appendix at end of this inspection report has some illustrations that may aid inspection
Please use the remark section under each section if there is any comment/observation noted during inspection. If there are more devices fitted than space in report to complete the relevant information, please supplement report with separate document. Photograph all sides of trailer
Min height indicates distance from ground to lower edge of illuminated area, max height to top edge of illuminated areaWidth indicates distance from nearest external vertical edge of trailer to nearest edge of illuminated areaLength indicates distance from rear external edge of trailer to nearest edge of illuminated area on side lamps/reflectors or the distance between adjacent lamps.
Page 1 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Colour Presence Number Arrangement
PositionState in remarks if more than 2 and record dimension separate
Geometric Visibilityß=horizontal angleα= vertical angle
Electrical Connections
Tell-Tale
Reversing Lamp(6.4 of R48)
White MandatoryO2, O3,O4,
optional on O1 trailers
Category AR
1 mandatory2nd optional
(2nd
mandatory on trailers
length >6m)
No individual specificati
on
Width - no requirementHeight -above 250 – below
1200 mm
α =15° upwards and 5° downwards
ß=45° to right and left if one device.
45° right and 30° left if two installed
Only light when reverse gear
selected when engine in operation
Optional
Device(s) evident: Yes/No
Illuminates white: Yes/No
Record E number:
Record characteristic “AR” if evident:
No of devices:
Location Device no 1
Device no 2
Complies withaboveYes/No
Complies withaboveYes/No
Height: Yes No Yes NoWidth:
Remarks if any (reversing lamp):
Function Colour Presence Number Arrangement Position Geometric Visibility
ß=horizontal angleα= vertical angle
Electrical Connections
Tell-Tale
Rear Registration Plate Lamp
(6.8 R48)
White Mandatory
Category L
Such that the device illuminates
the plate
Such that the device illuminates
the plate
Such that the device illuminates
the plate
Such that the device illuminates
the plate
See note 1 below(5.11 R48)
Optional
Device(s) evident: Yes/No
Illuminates white: Yes/No
Record E number:
Record characteristic “L” if evident:
Complies with above: Yes/No
Complies with above: Yes/No
Complies with above: Yes/No
Complies with above: Yes/No
Complies with above: Yes/No
Yes No Yes No Yes Yes Yes No Yes No
Page 2 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Remarks if any (rear registration lamp):
Note 1: The electrical connections shall be such that the front and rear position lamps, the end-outline marker lamps, if they exist, the side-marker lamps, if they exist, and the rear registration plate lamp can only be switched ON and OFF simultaneously
Function Colour Presence Number Arrangement
PositionState in remarks if more than 2 and record dimension separate
Geometric Visibilityß=horizontal angleα= vertical angle
Electrical Connections
Tell-Tale
Direction Indicatorsand hazard
Warning(6.5+6.6 R48)
Amber MandatoryCategory 2a or 2b
2 mandatory+ 2 optional
2 rear Width: < 400mm from edgeWidth-inner edges not less than 600mm apart. 400mm if overall
width trailer less 1300mm Height: 350-1500mm
(2100mm if 1500mm not possible, remark if so)
α = 15° upwards and downwards
ß=80° outwards and 45° inwards
See note 2 below(6.5.7 - 6.5.9
R-48)
Visible or auditory or
both
Device(s) evident: Yes/No
Illuminates amber: Yes/No
Record E number:
Record characteristic “2a or 2b” if evident:
No of devices:
Location Device no 1
Device no 2
Complies withaboveYes/No
Height: Yes No
Width:
Distance apart:
Hazard warning lampsRequirement: The signal shall be operated by means of a separate control enabling all direction indicators to flash in phaseComplies with the above: Yes/NoRemarks if any (direction indicator/hazard):
Note 2: Direction-indicator lamps shall switch on independently of the other lamps. All direction-indicator lamps on one side of a vehicle shall be switched on and off by means of one control and shall flash in phase.
Page 3 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Function Colour Presence Number Arrangement
PositionState in remarks if more than 2 and record dimension separate
Geometric Visibility
ß=horizontal angleα= vertical angle
Electrical Connections
Tell-Tale
Stop Lamp(6.7 of R48)
Red MandatoryCategory S1 or S2
2 no special arrangeme
nts
Width-inner edges not less than 600mm apart. 400mm if overall
trailer width less 1300mmHeight: 350-1500mm
(2100mm if 1500mm not possible)
Width: < 400mm from edge
α = 15° upwards and downwards
ß=45° to right and left
Must light up when brake
applied when engine in operation
Optional,see note 3 below 6.7.7-6.7.9 R48
Device(s) evident: Yes/No
Illuminates red: Yes/No
Record E number:
Record characteristic “S1 or S2” if evident:
No of devices:
Location Device no 1
Device no 2
Complies withaboveYes/No
Complies withaboveYes/NoHeight
Width Yes No Yes NoDistance apart:
Remarks if any (stop lamp):
Page 4 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Function Colour Presence Number Arrangement
Position Geometric Visibility
ß=horizontal angleα= vertical angle
Electrical Connections
Tell-Tale
Rear Position Lamp
(6.10 R48)
Red MandatoryCategory
RorR1orR2
2for additional
optional lamps see
note 4 below 6.10.2.1 + 6.10.4.2
no special arrangeme
nts
W: <400mm from edgeWidth-inner edges not less than 600mm apart. 400mm if overall
trailer width less 1300mmH: 350-1500mm
(2100mm if 1500mm not possible)
α = 15° upwards and downwardsß=80° outwards and 45° inwards
See note 1 below5.11 R48
Circuit closed tell-tale see R-48
Device(s) evident: Yes/No
Illuminates red: Yes/No
Record E number:
Record characteristic “R or R1 or R2” if evident:
No of devices:
Location Device no 1
Device no 2
Complies withaboveYes/No
Height Yes No
Width
Distance apart:
Remarks if any (rear position lamp):
Note 1: The electrical connections shall be such that the front and rear position lamps, the end-outline marker lamps, if they exist, the side-marker lamps, if they exist, and the rear registration plate lamp can only be switched ON and OFF simultaneously
Function Colour Presence Number Arrange Position Geometric Electrical Tell-Tale
Page 5 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
ment Visibilityß=horizontal angleα= vertical angle
Connections
Rear Fog Lamp(6.11 R48)
Red Mandatory
CategoryF or F1 or F2
1 or 2 no special arrangeme
nts
Width: See note 3 below6.11.4.1 R-48
Height: 250-1000mm
α = 5° upwards and downwardsß=25° right and
left
See note 4 below 6.11.7.1 R-48
Circuit closed tell-tale. Independent
non flashing warning lamp
Device(s) evident: Yes/No
Illuminates red: Yes/No
Record E number:
Record characteristic “F or F1 or F2” if evident:
No of devices:
Location Device no 1
Device no 2
Complies withaboveYes/No
Height Yes No
Width
Remarks if any (rear fog lamp):
Note 3: If only one lamp fitted it shall be fitted on the centre of the trailer or to the right side of rear of trailerNote 4: The rear fog-lamp(s) can be switched off independently of any other lamp.
Either of the following applies: (A) The rear fog lamp(s) may continue to operate until the position lamps are switched off, and the rear fog lamp(s) shall then remain off until deliberately switched on again; (B). A warning, at least audible, additional to the mandatory tell-tale shall be given if the ignition is switched off or the ignition key is withdrawn and the driver's door is opened, whether the lamps in (paragraph 6.11.7.1.) are on or off, whilst the rear fog lamp switch is in the "on" position.
Page 6 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Function Colour Presence Number Arrangement
Position Geometric Visibility
ß=horizontal angleα= vertical angle
Electrical Connections
Tell-Tale
End-Outline Marker Lamp
Rear(6.13 R48)
Red Rear Mandatory if width >2.1m
CategoryR,R1,R2,RM1orRM2
(Rear)
2 rear no special arrangeme
nts
W: < 400mm and as close as possible to edge H: at max. height compatible with designSee note 6 below 6.13.4.2
See note 1 below5.11 R48
See note 1 below5.11 R48
Optional, see R-48
Device(s) evident: Yes/No
Illuminates red : Yes/No
Record E number:
Record characteristic “R, R1, R2, RM1 orRM2” if evident:
No of devices:
Location Device no 1
Device no 2
Complies withaboveYes/No
Height Yes Yes
Width
Remarks if any (end outliner marker Rear):
Note 1: The electrical connections shall be such that the front and rear position lamps, the end-outline marker lamps, if they exist, the side-marker lamps, if they exist, and the rear registration plate lamp can only be switched ON and OFF simultaneously
Page 7 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Function Colour Presence Number Arrangement
Position Geometric Visibility
ß=horizontal angleα= vertical angle
Electrical Connections
Tell-Tale
Rear Retro-Reflector
Triangular(6.15 R48)
Red Mandatory Category class
IIIA or IIIB
2
Apex of ▲
directed upwards
W: <400mm from edgeWidth-inner edges not less than 600mm apart. 400mm if overall
trailer width less 1300mm H:250-900mm or 1200mm or
1500mmSee R-48
α = 15° above and below
ß=30° inwards and outwards
n/a n/a
Device(s) evident: Yes/No
Reflector red : Yes/No
Record E number:
Record characteristic “IIIA or IIIB” if evident:
No of devices:
Complies withaboveYes/No
Location Device no 1
Device no 2
Complies withaboveYes/No
Yes No Height Yes NoWidth
Distance apart:
Remarks if any (Rear Retro-Reflector Triangular):
Page 8 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Function Colour Presence Number Arrangement
Position Geometric Visibility
ß=horizontal angleα= vertical angle
ElectricalConnecti
ons
Tell-Tale
Side Retro-Reflector Non-
Triangular(6.17 R48)
Amber Mandatory Category class
IA or IB
See note5below
State in remarks if different
arrangement of either side
No special arrangeme
nts
H: 250-900mm(1500mm if 900mm not possible)L: fitted middle third and distance between adjacent reflectors <3m.See note 6 below
α = 10° above and below
ß=45° front and to the rear
n/a n/a
Device(s) evident: Yes/No
Reflector amber : Yes/No
Record E number:
Record characteristic “IA or IB” if evident:
No of devices left side:
Location rear-mostdevice
middledevice
fore-mostdevice
Complies withaboveYes/No
Height: Yes No
No of devices right side:
longitudinalDistance from rear:
N/A N/A
longitudinalDistance from front:
N/A N/A
Maximum distance between any two adjacent reflectors:
Remarks if any (Side Retro-Reflector Non-Triangular):
Note 5: Longitudinal requirements: at least one side retro-reflector shall be fitted to the middle third of the trailer, the foremost side retro-reflector being not further than 3 m from the front; The distance between two adjacent side retro-reflectors shall not exceed 3 m. The distance between the rearmost side retro-reflector and the rear of the trailer shall not exceed 1 m.
Page 9 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Function Colour Presence Number Arrangement
Position Geometric Visibilityß=horizontal angleα= vertical angle
ElectricalConnecti
ons
Tell-Tale
Side-Marker Lamps
(6.18 R48)
Amber Mandatory if: > 6m long,
Category SM1
See note 5belowState in
remarks if different
arrangement of either side
No special arrangeme
nts
Height: 250-900mm(1500mm if 900mm not possible)Lenght: fitted middle third and distance between adjacent lamps <3mSee note 5 below
α = 10° above and below
ß=45° front and to the rear
Side-Marker Lamps
Amber
Device(s) evident: Yes/No
Illuminates amber : Yes/No
Record E number:
Record characteristic “SM1” if evident:
No of devices left side:
Location rear-mostdevice
middledevice
fore-mostdevice
Complies withaboveYes/No
Height: Yes No
longitudinalDistance from rear:
N/A N/A
No of devices right side:
longitudinalDistance from front:
N/A N/A
Maximum distance between any two adjacent lamps:
Remarks if any (Side Marker lamps):
Note 5 Longitudinal requirements: at least one side marker lamp shall be fitted to the middle third of the trailer, the foremost side marker being not further than 3 m from the front; The distance between two adjacent side retro-reflectors shall not exceed 3 m. The distance between the rearmost side retro-reflector and the rear of the trailer shall not exceed 1 m.
Function Colour Presence Number Arrangement
Position Geometric Visibility
Electrical Connections
Tell-Tale
Page 10 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
ß=horizontal angleα= vertical angle
Front Position Lamp
(6.9 R48)
White Mandatory on trailers if
> 1600mm wide
Category A
2 no special arrangeme
nts
W: < 150mm from edge H: 350-2100mm
α = 15° upwards and downwardsß=80° outwards and 45° inwards
See note 1 below5.11 R48
Circuit closed tell-tale
Device(s) evident: Yes/No
illuminates white : Yes/No
Record E number:
Record characteristic “A” if evident:
No of devices:
Location Device no 1
Device no 2
Complies withaboveYes/No
Height Yes NoWidth
Remarks if any (front position lamp):
Note 1: The electrical connections shall be such that the front and rear position lamps, the end-outline marker lamps, if they exist, the side-marker lamps, if they exist, and the rear registration plate lamp can only be switched ON and OFF simultaneously
Function Colour Presence Number Arrangement
Position* Geometric Visibility
ß=horizontal angleα= vertical angle
Electrical Connections
Tell-Tale
Front Retro-Reflector Non-
Triangular(6.16 R48)
White Mandatory Category class IA
or IB2
No special arrangeme
nts
W < 150mm H: 250-900mm(1500mm if 900mm not
possible)
α = 10° above and below
ß=30° inwards and outwards
n/a n/a
Device(s) evident: Yes/No
Reflector white : Yes/No
Record E number:
Record characteristic “IA or IB” if evident:
No of devices:
Location Device no 1
Device no 2
Complies withaboveYes/No
Height Yes No
WidthRemarks if any (front retro reflector lamp):
Function Colour Presence Number Arrange Position Geometric Electrical Tell-Tale
Page 11 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
ment Visibilityß=horizontal angleα= vertical angle
Connections
End-Outline Marker Lamp
Front(6.13 R48)
White Front, Mandatory if width >2.1m
CategoryA or AM (front)
2 front no special arrangeme
nts
W: < 400mm and as close as possible to edge H: at max. height compatible with design
See note 1 below5.11 R48
See note 1 below5.11 R48
Optional, see R-48
Device(s) evident: Yes/No
illuminates white : Yes/No
Record E number:
Record characteristic “A or AM” if evident:
No of devices:
Location Device no 1
Device no 2
Complies withaboveYes/No
Complies withaboveYes/No
Height Yes Yes
Width
Remarks if any (end outliner marker Rear and front):
Note 1: The electrical connections shall be such that the front and rear position lamps, the end-outline marker lamps, if they exist, the side-marker lamps, if they exist, and the rear registration plate lamp can only be switched ON and OFF simultaneously
Function Colour Presence Requirement (supply photos of all contour marking fitted with this report)
Page 12 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
See illustrations below for assistance
Conspicuity markings (reflective
contour tapeREAR
(6.21 R48)
Red Mandatory O3, O4 if width >2.1m and
length > 6mCategory
Conspicuity markings shall be as close as practicable horizontally and vertically, compatible with the shape, structure, design and operational. Markings can be considered continuous if gaps are less than 50% of the length of adjacent elements (see illustration belwo)If partial markings fitted, shall follow as close as practical the contour of outer shape of trailer.Shall not be within 200mm of rear brake lamp
reflective tape evident: Yes/No
Reflective red : Yes/No
Record E number:
Yes NoFull contour marking to the rear?:Fitted as close as possible to the horizontal and vertical edges?:Partial contour marking to the rear?:If partial, shall follow as close as practical the contour of outer shape of trailer?:Lowest edge within 250 and 1500mm from the ground mm
At least 200mm away from mandatory brake light? mm
Remarks if any (Conspicuity markings Rear):
Function Colour Presence Requirement (supply photos of all contour marking fitted with this report)See illustrations below for assistance
Conspicuity markings (reflective
contour tapeSIDE
(6.21 R48)
white or yellow Mandatory O3, O4 if width >2.1m and
length > 6mCategory
Conspicuity markings shall be as close as practicable to being parallel to median longitudinal plane horizontally and vertically, compatible with the shape, structure, design and operational.If partial markings fitted, shall follow as close as practical the contour of outer shape of trailer
reflective tape evident: Yes/No
Reflective white or yellow :
Record E number:
Yes NoPartial contour marking at both end top side corners? (see image pg 14 below)Within 600mm of either end of trailer?Must cover at least 70% of the overall length? (see image pg 14 below) mm
Lowest edge within 250 and 1500mm from the ground mm
Remarks if any (Conspicuity markings side):
Page 13 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Page 14 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Page 15 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Page 16 Rev. 01
TR-20 Trailer Light Installation inspection (O1, O2, O3 and O4)(Summarised requirements. numbering reference in table- see UNECE R48)
Example of approval mark on rear lamp cluster
Above is an example of an approval mark on a lamp cluster. The letter “F” indicates Fog lamp function, “2a” indicates direction indicator function, “AR” indicates reversing lamp function, “R” indicates rear position lamp function, “S1” indicates stop lamp function. The two digits directly underneath each letter indicates the series of amendments it complies to. The “E9” in the circle is the country it was approved in. The number underneath E9 “1432” is the sequential approval number assigned by the country which approved
Page 17 Rev. 01
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