prEN IEC 60570:2026

Electrical supply track systems for luminaires

Elektrische Stromschienensysteme für Leuchten

Systèmes d'alimentation électrique par rail pour luminaires

Električni tračni napajalni sistemi za svetilke

General Information

• Status: Not Published
• Publication Date: 25-Oct-2027
• ICS: 29.120.20 - Connecting devices
• ICS: 29.140.40 - Luminaires
• Technical Committee: CLC/TC 34 - 'Lamps and related equipment
• Current Stage: 4020 - Enquiry circulated - Enquiry
• Start Date: 03-Apr-2026
• Due Date: 19-Dec-2025
• Completion Date: 03-Apr-2026
• Directive: Harmonized Standard2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: oSIST prEN IEC 60570:2026 - Electrical supply track systems for luminaires

Relations

• Revises: EN 60570:2003/A2:2020 - Electrical supply track systems for luminaires
• Effective Date: 23-Apr-2024
• Revises: EN 60570:2003/A1:2018 - Electrical supply track systems for luminaires
• Effective Date: 23-Apr-2024
• Revises: EN 60570:2003 - Electrical supply track systems for luminaires
• Effective Date: 23-Apr-2024

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2026
Električni tračni napajalni sistemi za svetilke
Electrical supply track systems for luminaires
Elektrische Stromschienensysteme für Leuchten
Systèmes d'alimentation électrique par rail pour luminaires
Ta slovenski standard je istoveten z: prEN IEC 60570:2026
ICS:
29.140.50 Instalacijski sistemi za Lighting installation systems
razsvetljavo
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

34D/1811/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60570 ED5
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2026-04-03 2026-06-26
SUPERSEDES DOCUMENTS:
34D/1747/CD, 34D/1760A/CC
IEC SC 34D : LUMINAIRES
SECRETARIAT: SECRETARY:
United Kingdom Ms Shanti Conn
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electrical supply track systems for luminaires

PROPOSED STABILITY DATE: 2030
NOTE FROM TC/SC OFFICERS:
Project Leader: Fabrizio Tironi

this electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee
positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose
without permission in writing from IEC.

IEC CDV 60570 © IEC 2026
1 CONTENTS
2 1 Scope . 4
3 2 Normative references . 4
4 3 Terms and definitions . 5
5 4 Classification . 8
6 5 General test requirements . 8
7 6 Marking . 9
8 7 General requirements and ratings . 11
9 8 Construction . 11
10 9 Creepage distances and clearances . 18
11 10 Terminals . 18
12 11 External and internal wiring . 18
13 12 Thermal endurance and operating temperatures . 19
14 13 Protection against electric shock . 20
15 14 Resistance to humidity . 20
16 15 Insulation resistance and electric strength . 20
17 16 Provision for earthing . 20
18 17 Resistance to heat, fire and tracking . 21
19 18 Terminals and connections for external wiring . 22
20 Annex A (informative) Test to be carried out on luminaires supplied with track systems
21 providing control signals . 24
22 Annex B (informative) Schedule of amended subclauses containing more serious or
23 critical requirements which call for products to be retested . 25
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28 INTERNATIONAL ELECTROTECHNICAL COMMISSION
29 ____________
31 ELECTRICAL SUPPLY TRACK SYSTEMS FOR LUMINAIRES
34 FOREWORD
35 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
36 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
37 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
38 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
39 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
40 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
41 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
42 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
43 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
44 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
45 consensus of opinion on the relevant subjects since each technical committee has representation from all
46 interested IEC National Committees.
47 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
48 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
49 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
50 misinterpretation by any end user.
51 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
52 transparently to the maximum extent possible in their national and regional publications. Any divergence between
53 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
54 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
55 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
56 services carried out by independent certification bodies.
57 6) All users should ensure that they have the latest edition of this publication.
58 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
59 members of its technical committees and IEC National Committees for any personal injury, property damage or
60 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
61 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
62 Publications.
63 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
64 indispensable for the correct application of this publication.
65 9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
66 patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
67 respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
68 may be required to implement this document. However, implementers are cautioned that this may not represent
69 the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
70 shall not be held responsible for identifying any or all such patent rights.
71 IEC 60570 has been prepared by subcommittee 34D: Luminaires, of IEC technical committee
72 34: Lighting. It is an International Standard.
73 This fifth edition cancels and replaces the fourth edition published in 2003, Amendment 1:2017
74 and Amendment 2:2019. This edition constitutes a technical revision.
75 This edition includes the following significant technical changes with respect to the previous
76 edition:
77 a) The clause numbers have been aligned with those of IEC 60598-1:2024;
78 b) ….
IEC CDV 60570 © IEC 2026
80 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
82 Full information on the voting for its approval can be found in the report on voting indicated in
83 the above table.
84 The language used for the development of this International Standard is English.
85 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
86 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
87 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
88 described in greater detail at www.iec.ch/publications.
89 The committee has decided that the contents of this document will remain unchanged until the
90 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
91 specific document. At this date, the document will be
92 • reconfirmed,
93 • withdrawn, or
94 • revised.
IEC CDV 60570 © IEC 2026
99 ELECTRICAL SUPPLY TRACK SYSTEMS FOR LUMINAIRES
103 1 Scope
104 This document specifies safety requirements for the following track systems with two or more
105 poles for the connection of luminaires to the electrical supply consisting of, either
106 a) a system with provision for protective earthing and with a rated voltage not exceeding 440 V
107 between poles and where the rated current does not exceed 16 A per conductor, for use
108 with class I and class II luminaires, or
109 b) a system without provision for protective earthing where protection against electric shock is
110 based on a SELV supply and where the rated current does not exceed 25 A per conductor,
111 for use with class III luminaires, or
112 c) a combination of a) and b) for connecting both class I and class II luminaires and class III
113 luminaires simultaneously but in different sector openings.”
114 The track systems can also provide for the mechanical support of the luminaires.
115 This document applies to track systems designed for ordinary interior use for mounting on, or
116 flush with, or suspended from walls and ceilings. These track systems are not intended for
117 locations where special conditions prevail as in ships, vehicles and the like and in hazardous
118 locations, for example, where explosions are liable to occur.
119 This document does not cover operational or performance compatibility between different track
120 systems. Protection against unsafe compatibility between Class I and Class III circuit s is
121 covered by this document.
122 In addition to supply circuits, the track system can be provided with auxiliary circuits such as
123 those for the purpose of a control or audio signal.
124 NOTE At present, on the market, the following types of control systems are available:
125 − FELV control signal, basic insulated from mains supply (e.g. Digital Addressable Lighting Interface and 1 –10 V
126 DC controls);
127 − SELV or PELV control signal (e.g. DMX);
128 − control signal, not insulated from mains supply (e.g. push button control, phase cut, step dim).
129 Track systems can also be provided with conductors specifically identified for powering
130 emergency lighting luminaires.
131 2 Normative references
132 The following documents are referred to in the text in such a way that some or all of their content
133 constitutes requirements of this document. For dated references, only the edition cited applies.
134 For undated references, the latest edition of the referenced document (including any
135 amendments) applies.
136 IEC 60417 Graphical symbols for use on equipment available at http://www.graphical-
137 symbols.info/equipment
138 IEC 60598-1:2024, Luminaires – Part 1: General requirements and tests
139 IEC 60598-2-22:2021, Luminaires – Part 2-22: Particular requirements – Luminaires for
140 emergency lighting
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142 IEC 61032:1997, Protection of persons and equipment by enclosures – Probes for verification
143 3 Terms and definitions
144 For the purposes of this document, the terms and definitions given in IEC 60598-1 and the
145 following apply.
146 ISO and IEC maintain terminology databases for use in standardization at the following
147 addresses:
148 • IEC Electropedia: available at https://www.electropedia.org/
149 • ISO Online browsing platform: available at https://www.iso.org/obp
152 3.1
153 luminaire track system
154 system, including a track with conductors, for the connection of luminaires to an electrical
155 supply in a range of different positions determined only by the length and location of the track
156 and comprising some or all of the components defined in 3.2 to 3.14 (see Figure 1)
157 Note 1 to entry: The track system can be provided with auxiliary circuits for the purpose of a control or audio signal
158 other than supply; the track system may be used to supply luminaires where the control signals are injected via
159 supply conductors or a circuit connected to the supply via separated conductors (e.g. powerline).
160 Note 2 to entry: The track system can be provided with circuits identified to ensure battery recharge (for self-
161 contained emergency luminaires).
162 Note 3 to entry: Luminaires can be positioned or repositioned along the length of track in a simple manner without
163 the use of tools.
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(3.4) (3.7) (3.6) (3.7) (3.3) (3.7) (3.8) (3.5) (3.8) (3.7) (3.2) (3.5)
(3.9)
Independent
outlet box
166 3.2 Track.
167 3.3 Coupler.
168 3.4 Track supply connector – supply into track.
169 3.5 Luminaire supply connector – supply from track only.
170 3.6 Adaptor – Mechanical and electrical connection to track.
171 3.7 Track suspension device (to ceiling or to suspension tubes).
172 3.8 Luminaire suspension device – mechanical connection only to track.
173 3.9 End cover
174 NOTE 1 This drawing is for guidance only; it does not prescribe design features.
175 NOTE 2 The independent outlet box is not part of the definition of a luminaire track system .
177 Figure 1 – Example of a luminaire track system with identified components included in
178 the definition
180 3.2
181 track
182 generally linear assembly of conductors within a housing providing the electrical connection
183 and in most instances mechanical support of luminaires
185 3.3
186 track coupler
187 coupler
188 component enabling electrical or mechanical connection to be made between tracks
189 3.4
190 track supply connector
191 supply connector
192 component used for the electrical connection of a supply to the track system
193 Note 1 to entry: The function of a coupler and a track supply connector may be combined.
194 Note 2 to entry: For the SELV sector, the track supply connector may incorporate a SELV convertor or safety
195 isolating transformer supplied directly from the mains voltage sector.
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197 3.5
198 luminaire supply connector
199 component for the power supply connection of a luminaire to the track
200 Note 1 to entry: The luminaire supply connector does not mechanically connect a luminaire to the track.
201 3.6
202 track adaptor
203 adaptor
204 component used for the electrical and mechanical connection of a luminaire to the track
205 Note 1 to entry: An adaptor may incorporate a switch or a fuse.
207 3.7
208 track suspension device
209 suspension device
210 component used for the mechanical connection of the track system to the supporting surface
211 3.8
212 luminaire suspension device
213 component used for the mechanical connection of a luminaire to the track
214 3.9
215 end cover
216 component intended to be fixed at the end of a track, providing electrical and mechanical
217 protection of the ends of the conductors
218 3.10
219 class I track
220 generally linear assembly of conductors and housing designed to be operated from a mains
221 voltage supply providing the electrical connection and in most instances mechanical support of
222 class I and class II luminaires only.
223 Note 1 to entry: The track can be provided with auxiliary circuits for control or audio signals. These auxiliary circuits
224 can use conductors originally designed for mains supply.
225 Note 2 to entry: The track system can be provided with circuits identified to ensure battery recharge (for self-
226 contained emergency luminaires).
227 3.11
228 class III track
229 generally linear assembly of conductors and housing designed to be operated from a SELV
230 supply providing the electrical connection and in most instances mechanical support of class III
231 luminaires only
232 Note 1 to entry: The track can be provided with auxiliary circuits for a SELV control or audio signals. These auxiliary
233 circuits can use separate auxiliary conductors or conductors originally designed for a SELV supply.
234 3.12
235 mixed supply track system
236 combination of class I track and class III track
237 3.13
238 rated current
239 current assigned to the track or the component
240 3.14
241 track sector opening
242 sector opening
243 opening in the track enabling the electrical connection of the adaptor or the luminaire supply
244 connector to the track conductors
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245 4 Classification
246 Luminaire track systems shall be either class I, class III or a mixed supply track system with
247 class I and class III sectors in accordance with the provisions of IEC 60598-1:2024, Clause 5.
248 Luminaire track systems shall only be classified as systems providing protection against
249 accidental contact with hazardous live parts but without any other special protection against
250 dust, solid objects or moisture.
251 Luminaire-adaptor assemblies that are inseparable may be class II in accordance with the
252 provisions of IEC 60598-1:2024, Clause 5 provided they contain no protective earthing facilities.
253 Separate adaptors for mains voltage supply shall be classified as class I, but may be used with
254 class II luminaires.
255 5 General test requirements
256 5.1 The requirements and tests of this document shall not be applied to equipment already
257 subject to its own separate IEC standard.
258 For assessment of luminaire track systems already assessed in accordance with the previous
259 edition, full type testing is not generally necessary and the product and the previous test results
260 are reviewed only against any amended clauses listed in Annex B
262 Note The use of the term luminaire (see IEC 60598-1) hereinafter also includes components of the luminaire track
263 system.
264 Where the terms "voltage" and "current" are used, these imply the RMS values, unless
265 otherwise stated.
266 5.2 Tests according to this document are type tests.
267 One test sample as described in 5.3 shall be subjected to all relevant tests.
268 In order to reduce the time of testing and to allow for any tests which may be destructive,
269 additional samples of the same type or parts of samples can be provided. These shall be of the
270 same materials as the original sample.
271 5.3 Unless otherwise specified, the sample is tested as delivered and under the most
272 unfavourable conditions of use taking into account the instructions, at an ambient temperature
273 of between 10 °C and 30 °C.
274 The minimum test sample of a class I or a class III track shall include items a) to i) as follows.
275 For a mixed supply system the minimum sample quantities stated are required for both class I
276 and class III sectors.
277 For track systems with control interface conductors or additional circuits, samples of the
278 different constructions shall be provided; the same applies to tracks designed for use with
279 emergency luminaires.
280 a) where a track system provides for interconnection between track lengths, at least 3 sections of
281 track comprising a total length when assembled together of not less than 2,4 m and including
282 1 section of maximum length as indicated in the product literature. Where interconnection
283 is not provided for, only 1 track section of maximum length is required;
284 b) 1 track supply connector;
285 c) 1 end cover if applicable;
286 d) 1 coupler per length of track supplied;
IEC CDV 60570 © IEC 2026
287 e) 1 adaptor per length of track supplied;
288 f) 1 luminaire supply connector per length of track supplied;
289 g) the necessary suspension devices and any other components as specified in the installation
290 instructions;
291 h) a compatible track luminaire representing the most unfavourable combination from a testing
292 point of view for the purpose of the test of clause 12;
293 i) additionally with a class III track system sample, one section of track of each type of class
294 I track made by the same manufacturer.
295 NOTE Item i) is required for the tests of 8.3 when testing a class III track system.
296 5.4 Unless otherwise specified, the tests are carried out in the order of the clauses.
297 6 Marking
298 6.1 The provisions of IEC 60598-1:2024, Clause 6 apply together with the following
299 requirements in 6.2 to 6.12.
300 6.2 Class I tracks shall be marked with rated current (A), rated voltage (V).
301 Class III tracks shall be marked with rated current (A), rated voltage (V) and the graphical
302 symbol IEC 60417-5180:2003-02 for class III equipment.
303 Mixed supply track system shall be marked with the rated current (A), rated voltage (V) on the
304 mains voltage sector and on the SELV sector respectively. The SELV sector shall also be
305 marked with the graphical symbol IEC 60417­5180:2003-02 for class III equipment.
306 For three-phase track systems, both the line to neutral and line to line voltages, together with
307 the characteristics of the supply system, shall be marked, e.g., 3/N/PE 230/400V
308 Note: additional information for the marking of polyphase track system can be found in IEC 61293.
309 6.3 Adaptors and luminaire supply connectors need only be marked with their rated current,
310 rated voltage, manufacturer's name or trade mark and type reference and the graphical symbol
311 IEC 60417-5180:2003-02 for class III equipment if applicable.
312 Adaptors and luminaire supply connectors incorporated into luminaires do not require additional
313 marking a to that of the luminaire.
314 If the adaptor has a fuse incorporated, the rated current and type of fuse shall be marked on
315 the body of the adaptor.
316 6.4 Couplers and track supply connectors need only be marked with the manufacturer's name
317 or trade mark and type reference and the graphical symbol IEC 60417-5180:2003-02 for class
318 III equipment if appropriate.
320 6.5 All terminals in luminaire supply connectors, track supply connectors and adaptors shall
321 be marked with their identification; the mounting instructions shall explain the meaning of
322 identification and the relevant circuit connections or functions .
323 Note: Some track and adaptor terminals can be identified with a dual function such as for supply or audio signal
324 connection.
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325 6.6 Marking of the rated current and the rated voltage of the track system shall be easily
326 discernible during and after installation of the track system.
327 6.7 In addition to the above markings the following details, shall be given either on the
328 luminaire track system or in the instructions supplied with it:
329 a) Details of the maximum mechanical loading for which each section of the track system and
330 luminaire suspension devices are suitable, inclusive of the weight of luminaires and
331 accessories. In addition, a warning that the mechanical loading shall be intended as
332 the complete loading of the whole system. If the track is intended to be wall mounted,
333 or has similar non-horizontal mounting, the instructions shall contain information regarding
334 any limitations of the track positioning, and the maximum specified mechanical loadings .
335 b) a warning that it is the user's responsibility to ensure electrical, mechanical and thermal
336 compatibility between the track system and luminaires attached to it.
337 6.8 In addition to the above markings the following details, if applicable for proper use and
338 maintenance, shall be given either on the luminaire track system or in the instructions supplied
339 with it:
340 a) a warning if the components are unsuitable for the connection of inductive loads, or de -
341 rating for inductive loads if appropriate;
342 b) the maximum permissible track temperature under normal operating conditions if different
343 from 70 °C;
344 Mounting instructions supplied with the adaptor shall state the track system on which it may be
345 used and warnings shall be given that the use is limited to the track system specified.
346 6.9 In addition to the above markings and information, the following details shall be given in
347 the instructions supplied with class III and mixed supply track systems;
348 a) a warning that the class III system or sector opening shall only be connected to a SELV
349 supply designed for operating class III equipment;
350 b) where there is an associated safety isolating transformer or lamp controlgear, instructions
351 regarding the correct method of connection of the transformer or lamp controlgear terminals
352 to avoid misinterpretation of the primary and secondary terminals;
353 c) a warning that class III luminaire track systems or sectors openings and components are
354 not compatible with class I track systems and that class III luminaire connectors and
355 adaptors shall not be used on other manufacturer's track systems;
356 d) instructions concerning suitable means for overload and short-circuit protection of the SELV
357 circuit;
358 e) the minimum cross-sectional area and maximum length of the supply cable between
359 transformer and track supply connector;
360 f) a warning that for Class III track systems any connected control or audio signals shall only
361 be provided by a SELV source.
362 6.10 The instruction leaflet for class III track systems or sector openings shall contain the
363 following warning:
364 CAUTION: TO REDUCE THE RISK OF OVERHEATING AND FIRE
365 DO NOT BRIDGE CONDUCTORS
366 6.11 For track systems using control signals via conductors originally designed for mains
367 supply, instructions supplied with the track shall give information for the safe connection of
368 control signal conductors, if any misconnection could inadvertently reduce the required
369 electrical insulation between circuits.
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370 6.12 For track suitable for supplying emergency luminaires, the following details shall be given
371 in the instructions:
372 • for track systems designed to operate centrally supplied emergency luminaires: a warning
373 that the track and components shall be connected to a system designed to supply
374 emergency luminaires, to ensure the correct operating of emergency luminaires on the
375 whole system;
376 • for track systems used to supply a self-contained emergency luminaire: information that the
377 supply line for battery recharging shall be un-switched.
378 7 General requirements and ratings
379 Track systems shall be so designed and constructed that in normal use they function safely and
380 minimize the risk of danger to persons and surroundings. Accordingly, requirements, tests and
381 compliances are provided in this document to reduce the risk of harm to a tolerable level under
382 normal operating conditions, abnormal operating conditions and single fault conditions.
383 The rated voltage between poles for a class I track system shall not exceed 440 V and for a
384 class III system the rated voltage shall not exceed SELV voltage limits of 50 V AC RMS or 120 V
385 ripple free DC. The current rating for a class I track system shall be maximum 16 A and for a
386 class III system it shall be maximum 25 A. For a mixed system the rated current of each sector
387 opening shall not exceed the values given for a class I or a class III system respectively.
388 Compliance is checked by inspection of the marking.
389 8 Construction
390 8.1 The provisions of IEC 60598-1:2024, Clause 7 apply together with the requirements in
391 8.2 to 8.18 of this document with the exception of IEC 60598-1:2024, 7.11.6 which is replaced
392 by 8.12 of this document.
393 Annex A provides details regarding the test to be carried out on luminaires supplied by track
394 systems using control signals via conductors designed for supply voltage.
395 8.2 Components for class I tracks shall be so designed that there is no risk of accidental
396 contact between the earthing contact of the component and the current-carrying parts of the
397 track during insertion and removal by the user.
398 This requirement does not apply during installation of the track system.
399 8.3 Adaptors, couplers and supply connectors shall be so constructed that electrical
400 connection with systems or sector openings of other classes of tracks made by the same
401 manufacturer is prevented.
402 For mixed supply track system, and where required for the safety of the system, the electrical
403 separation between different circuits (e.g. between SELV and LV supply) shall be provided
404 considering any possible configuration of the track system.
405 8.4 Class I adaptors shall incorporate provision for mechanical connection to the track such
406 that the weight of the adaptor and the luminaire is not supported by the electr
...