FprEN 50374:2024

SLOVENSKI STANDARD
01-februar-2021
Nadomešča:
SIST EN 50374:2004
Vozički za delo na nadzemnih vodih
Conductor carts
Leitungsfahrzeuge
Nacelles suspendues
Ta slovenski standard je istoveten z: prEN 50374
ICS:
13.260 Varstvo pred električnim Protection against electric
udarom. Delo pod napetostjo shock. Live working
29.240.20 Daljnovodi Power transmission and
distribution lines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD DRAFT
prEN 50374
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2020
ICS  Will supersede EN 50374:2004 and all of its
amendments and corrigenda (if any)
English Version
Conductor carts
Nacelles suspendues Leitungsfahrzeuge
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2021-03-12.

It has been drawn up by CLC/TC 78.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 66985 Ref. No. prEN 50374 E

prEN 50374:2020 (E)
Contents Page
European foreword .4
1 Scope .5
2 Normative references .5
3 Definitions .5
4 List of significant hazards .7
5 Requirements . 10
5.1 Classification of conductor cars . 10
5.2 Mechanical requirements . 10
5.2.1 General . 10
5.2.2 Load-bearing structure . 10
5.2.3 Welded joints . 10
5.3 Prevention of the conductor car falling . 10
5.4 Braking system . 11
5.4.1 General . 11
5.4.2 Drive brakes . 11
5.4.3 Locking brakes . 11
5.5 Floor covering . 11
5.6 Fall from height protection of the operator . 11
5.6.1 Fall arrest attachment options . 11
5.6.2 Side guards and Hand rails . 11
5.6.3 Entanglement and entrapment points . 12
5.6.4 Operator environment . 12
5.6.5 Warning signs . 12
5.7 Tow rope attachment point . 13
5.8 Lifting points for raising and lowering . 13
5.9 Built in traction sources . 13
5.9.1 General . 13
5.9.2 Hydraulic equipment . 13
5.9.3 Electrical equipment . 13
5.9.4 Batteries . 13
5.9.5 Combustion engines . 13
5.9.6 Operating controls . 14
5.9.7 Drive systems . 14
5.9.8 Disengaging mechanism in the event of a breakdown of the built-in-traction . 14
5.10 Equipotential bonding . 14
5.11 Safety net. 14
5.12 Identification plate . 14
5.13 Instructions for use . 15
5.14 Log-book . 16
5.15 For a harmonized standard . 16
6 Tests . 17
6.1 General . 17
6.2 Test of the load bearing structure . 18
6.3 Handling test . 18
6.4 Visual inspection . 18
6.5 Prevention of the conductor car falling . 19
prEN 50374:2020 (E)
6.6 Brake test. 19
6.6.1 General . 19
6.6.2 Drive brake test . 19
6.6.3 Locking brake test . 19
6.7 Functional brake test . 20
6.8 Fall from height protection of the operator . 20
6.8.1 Testing of fall arrest attachment options . 20
6.8.2 Test of the side guards and hand rails . 20
6.9 Test of tow rope attachment point . 20
6.10 Test of lifting points for raising and lowering . 20
6.11 Test of drive systems . 21
6.12 Test of operating controls . 21
6.13 Test of entanglement and entrapment points . 21
6.14 Wipe test . 21
6.15 Test of hydraulic equipment . 21
6.16 Test of electrical equipment. 21
6.17 Functional hydraulic and/or electrical tests . 21
6.18 Test of disengaging the drive mechanism in the event of a breakdown of built-in-
traction . 21
6.19 Test of safety net . 22
6.20 Test of the equipotential bonding . 22
Bibliography . 26

prEN 50374:2020 (E)
European foreword
This document (prEN 50374:2020) has been prepared by CLC/TC 78 “Equipment and tools for live
working”.
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
This document will supersede EN 50374:2004 and all of its amendments and corrigenda (if any).
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive(s).
For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this
document.
prEN 50374:2020 (E)
1 Scope
This document applies to conductor cars that are used to access overhead line conductors, shield wires
or shield wires with integrated communication systems to undertake work involving rectification of
defects and/or installing components and fittings. This document covers also bicycle type access
equipment where it is applicable.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1011-4:2000, Welding - Recommendations for welding of metallic materials - Part 4: Arc welding of
aluminium and aluminium alloys
EN 60204-1:2006, Safety of machinery - Electrical equipment of machines - Part 1: General
requirements (IEC 60204 1:2005, modified)
EN ISO 4413:2010, Hydraulic fluid power - General rules and safety requirements for systems and their
components (ISO 4413:2010)
EN ISO 10042:2018, Welding - Arc-welded joints in aluminium and its alloys - Quality levels for
imperfections (ISO 10042:2018)
EN ISO 12100:2010, Safety of machinery - General principles for design - Risk assessment and risk
reduction (ISO 12100:2010)
3 Definitions
For the purposes of this document, the following terms and definitions apply.
IS
...