UN R148 Supplement 2 (01 series) · UNECE Regulation No. 148 (ECE R148) — Uniform provisions concerning the approval of light-signalling devices (lamps) for power-driven vehicles and their trailers.
UN R148 — Supplement 2 to the 01 series of amendments
Supplement 1 → 2
- What changed
- For all other lamps, Annex 8, paragraph 1.2.2. now allows measurement after photometric stability has occurred, as an alternative to after 30 minutes of operation.
- In Table 8, the maximum value for direction indicators of categories 11a, 11b and 11c is now 1.20∙10³ cd instead of 1.20∙10² cd.
- Paragraph 5.7.7. now says when the light of the rearmost side marker lamp can be red instead of amber.
- Why
- Stabilization may occur in less than 30 minutes, depending on thermodynamic characteristics of the lamp; then there would be no need to wait longer.
- The maximum value for categories 11a, 11b and 11c in Table 8 became 120 cd by mistake; it should be 1,200 cd.
- Text on the colour of side marker lamps combined with any of the rearmost functions was missing from paragraph 5.7.7.
Q1What changed10 changes
Measurement after photometric stability (Annex 8, para. 1.2.2.)
For all other lamps, the luminous intensities are measured after 1 min and either after 30 minutes of operation or after photometric stability has occurred. These luminous intensities must comply with the minimum and maximum requirements. The luminous intensity distribution after 1 min of operation may be calculated from the distribution after 30 min of operation or after photometric stabilization. The ratio of luminous intensities measured at HV, used at each test point for this calculation, has the same two options. Before this supplement, the measurement and the calculation used the time after 30 minutes of operation.
Maximum value for direction indicators of categories 11a, 11b and 11c (Table 8)
In Table 8, the maximum value for direction indicators of categories 11a, 11b and 11c is now 1.20∙10³ cd. Before this supplement, it was 1.20∙10² cd. For category 11c, the value 4,00∙10² is now written 4.00∙10².
Red light of the rearmost side marker lamp (para. 5.7.7.)
The colour of the light emitted must be amber. However, it can now be red “if the rearmost side marker lamp is grouped or combined or reciprocally incorporated with the rear position lamp, the rear end-outline marker lamp, the rear fog lamp, the stop lamp, or is grouped with or has part of the light emitting surface in common with the rear retro-reflector”. Before this supplement, paragraph 5.7.7. did not have this sentence.
Renumbered paragraphs 3.3.1.1.1. and 3.3.1.2.
Paragraph 3.3.1.2. becomes paragraph 3.3.1.1.1. and paragraph 3.3.1.3. becomes paragraph 3.3.1.2.
End of the voltage marking list (para. 3.3.4.4.)
In paragraph 3.3.4.4., item (d) “Non-replaceable light sources” now ends with a full stop instead of “; and/or”. This list gives the cases in which lamps must bear marking of the rated voltage(s) or the range of voltage.
Q2Why it changed
- Proposed by
- Informal Working Group on Simplification of Lighting and Light-Signalling Regulations (IWG SLR); experts from the International Automotive Lighting and Light-Signalling Expert Group (GTB)
- Working party
- GRE, 89th session (October 2023)
Reasons
Depending on the thermodynamic characteristics of the lamp, stabilization may occur in less than 30 minutes. In such a case, there would be no need to wait longer.
Source
“Depending on thermodynamic characteristics of the lamp, the stabilization may occur in less than 30 minutes. In such a case there would be no need to wait for more time.”
The proposed solution is intended to align the start of measurements between UN Regulations Nos. 148 and 149. With the parallel amendment to UN Regulation No. 48, it will also allow a measurement after a defined time which is at least 5 minutes.
Sources (2)
“The proposed solution is intended to align the start of measurements between UN Regulations Nos. 148 and 149”
“further to the parallel amendment to UN Regulation No. 48, it will also allow a measurement after a defined time which is at least 5 minutes”
During the conversion to scientific notation, the maximum value for categories 11a, 11b and 11c in Table 8 became 120 cd (1.20∙10²) by mistake. It should be 1,200 cd (1.20∙10³).
Sources (2)
“In Table 8, during the conversion to scientific notation, by mistake the maximum value of the direction indicators of categories 11a, 11b and 11c became 120 cd (i.e. 1.20∙102)”
“while it should be 1,200 cd (i.e. 1.20∙103)”
In paragraph 5.7.7., some text on the colour of side marker lamps (SML) when combined with any of the rearmost functions was missing. The reinserted text is taken from paragraph 5.7.4. of the original series of amendments to UN Regulation No. 148.
Sources (2)
“In paragraph 5.7.7. some text was missing, dealing with the colour of side marker lamps (SML) when combined with any of the rearmost functions.”
“The reinserted text is taken from para. 5.7.4. of the original”
The structure of paragraph 3.3.1.2. was aligned with UN Regulation No. 149, and the following paragraph was renumbered accordingly. Superfluous words at the end of paragraph 3.3.4.4. were removed, as a purely editorial correction.
Sources (2)
“The structure of paragraph 3.3.1.2. has been aligned with UN Regulation No. 149 and the following paragraph has been renumbered accordingly.”
“Superfluous words at the end of paragraph 3.3.4.4. have been removed. This is a purely editorial correction.”
Document trail
- 2023-08ProposalECE/TRANS/WP.29/GRE/2023/14IWG SLR proposal to clarify and correct the 01 series of amendments to UN Regulation No. 148
- 2023-08ProposalECE/TRANS/WP.29/GRE/2023/20GTB proposal to improve the definition of photometric stability
- —Working party adoptsECE/TRANS/WP.29/GRE/89GRE session report, paras. 9 and 16
- 2023-12Sent to WP.29ECE/TRANS/WP.29/2024/23Text that GRE sent to WP.29 and AC.1
- 2024-03WP.29 adoptsECE/TRANS/WP.29/1177Adopted at the 192nd session (session report, para. 140)
- 2024-09-22In forceC.N.417.2024.TREATIES-XI.B.16.148UN depositary notification
Q3Who is affected
Vehicle manufacturer
- No direct action for this role.
Component supplier
- If you seek red light for the rearmost side marker lamp, make sure it meets the new colour conditions.
- Check the maximum luminous intensity of your direction indicators against the changed values in Table 8.
Technical service / Approval authority
- For all other lamps, be ready to measure after photometric stability, as an alternative to 30 minutes of operation.
- Use the new maximum values in Table 8 when you test direction indicators.
- Be ready to check the new conditions when the rearmost side marker lamp emits red light.
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ⓘ This report gives advice only. It is not legal or type-approval advice.