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BS EN 50528:2024

BS EN 50528:2024

$215.11

Insulating ladders for use on or near low voltage electrical installations

Published By Publication Date Number of Pages
BSI 2024 72
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This document is applicable to portable ladders made only of non-conductive stiles, including accessories (pole leaning device, adjustable levelling device, adjustable ladder stabilizer, etc.) used to work on or near electrical systems and installations in the low voltage range (up to 1 000 V AC/1 500 V DC). These ladders are used to provide temporary access, generally on overhead line structures, and to undertake electrical operations. They are expected to be used by one person only. These ladders, in conjunction with other protective equipment provide sufficient insulation level to protect against inadvertent contact with live low voltage installations. This document does not cover ladders used for live working on electrical installations at voltages above 1 000 V AC and above 1 500 V DC. These insulating ladders are separately covered by EN 61478. This document does not cover products not made entirely with non-conductive stiles generally called mixed ladders. In this case the EN 131 series apply. This document does not cover step stools, which are covered by EN 14183. These ladders are only for specific professional use. Only skilled persons, after an appropriate training, can use this type of ladder for professional applications. The products designed and manufactured according to this document contribute to the safety of the users provided they are used by skilled persons, in accordance with safe methods of work and the manufacturer instructions for use (where appropriate). Annex E gives a rationale to explain how a ladder which fulfils the requirements of this document used with correct accessories gives better safety for the user than an ordinary ladder.

PDF Catalog

PDF Pages PDF Title
2 undefined
11 1 Scope
2 Normative references
12 3 Terms and definitions
3.1 Types of ladder
14 3.2 Components and devices constituting a ladder
17 3.3 Materials
4 Requirements
4.1 General
18 4.2 Classification
4.3 Constituent parts of ladders – Dimensional characteristics
4.3.1 General
4.3.2 General dimensions of a ladder
4.3.2.1 The width of a ladder
19 4.3.2.2 The different labels used for the length of a ladder
21 4.3.3 Rungs and steps
4.3.3.1 General
4.3.3.2 Dimension of the rungs
4.3.3.3 Dimension of the steps
22 4.3.4 Platforms
4.3.4.1 General
4.3.4.2 Dimensions and characteristics of a standing platform
24 4.3.4.3 General dimensions and characteristics of a working platform
25 4.4 Mechanical characteristics of the different types of ladders
4.4.1 Standing ladder
4.4.1.1 Standing rung ladders
26 4.4.1.2 Standing step ladders
27 4.4.2 Leaning rung ladders
29 4.4.3 Combination ladder
4.4.3.1 general
30 4.4.3.2 Three-piece combination ladder (example of misuse)
31 4.4.4 General test requirements
4.4.4.1 For all ladders
32 4.4.4.2 For leaning ladders
4.4.4.3 For standing ladders
4.4.4.4 For 3-part combination ladders
4.5 Mechanical requirements
4.5.1 Materials
4.5.1.1 Metallic parts
4.5.1.2 Composite materials
4.5.2 Design
4.5.2.1 General (all types of ladders)
33 4.5.2.2 Surface finish
4.5.2.3 Stiles
34 4.5.2.4 Rungs – steps
35 4.5.2.5 Platform
4.5.2.6 Leaning ladders accessories
37 4.5.2.7 Specific components for standing ladders
38 4.5.2.8 Specific components for extending and combination ladders
4.6 Electrical requirements
4.7 Marking
4.7.1 General
39 4.7.2 Specific marking for insulating ladders
4.7.3 Maximal use of a ladder in accordance with its configuration
40 4.8 Instructions for use
5 Verification and testing
5.1 Generality
5.1.1 General conditions – environmental conditions,
41 5.1.2 General tolerances
5.2 Verification, design, dimensions, construction
5.3 Test methods for composite materials for ladders
5.3.1 Principle
42 5.3.2 Shock test
5.3.2.1 Preparation of the samples
5.3.2.2 Conditioning
5.3.2.3 Test
5.3.2.4 Acceptance criteria
5.3.3 Bending test
5.3.3.1 Preparation of the samples
5.3.3.2 Conditioning
43 5.3.3.3 Test
5.3.3.4 Acceptance criteria
5.3.4 Tensile test
5.3.4.1 Preparation of the samples for the tensile test
5.3.4.2 Conditioning
44 5.3.4.3 Test
5.3.4.4 Acceptance criteria
5.4 Tests on sub-assemblies and components
5.4.1 Feet pull test
5.4.2 Foot slip test
45 5.4.3 Test on stabilizer ladder device
5.4.3.1 General
5.4.3.2 Test for the ladder with a front type stabilizer
5.4.3.3 Test for the ladder with lateral type stabilizer or bar type stabilizer
5.4.4 Test on the pole leaning devices
5.4.5 Test on rungs and steps
5.4.6 Tests on standing platforms
5.4.6.1 General test
46 5.4.6.2 Kick-up test of the platform of standing ladders
5.4.6.3 Test on hand-/kneerails
5.4.7 Test on working platforms
5.4.7.1 General test
5.4.7.2 Protection bending test for a ladder with a working platform
5.4.8 Swaying test
47 5.5 Tests on complete ladders
5.5.1 Stability test for mobile ladders with platform
5.5.2 Lateral deflection test of the ladder
5.5.3 Bottom stile end test
48 5.5.4 Bending test of the stiles
5.5.5 Strength test of the stiles
5.5.6 Endurance test of the ladder
49 5.5.7 Dynamic drop test
50 5.5.8 Hooks and locking devices test
51 5.5.9 Test of opening restraint devices and hinges of ladders
5.5.9.1 General
5.5.9.2 Test of opening restraint devices and hinges of standing ladders
5.5.9.3 Test of hinge joint of single or multiple hinge-joint ladders
5.5.10 Vertical load test on rungs, steps and platform
5.5.11 Torsion test of rungs and steps
5.5.12 Compression test for locking devices
52 5.5.13 Maximum extending ladder test
5.5.14 3-part combination ladder in A-position test
5.5.15 Torsion test for standing ladders
5.5.16 Torsion test for leaning ladder
53 5.6 Electrical tests
5.6.1 On stiles and rungs
55 5.6.2 Other non conductive parts
5.7 Durability test on the marking.
5.8 Instruction for use
6 Alternative means for ladders having completed the production phase
7 Methods for assessment of defects and verification of performance
8 Modifications
56 Annex A (normative)Classification of defects and associated requirements and tests
57 Annex B (informative)In-service recommendations
B.1 General
B.2 Use and storage
B.3 Inspection before use
B.4 Periodic maintenance
B.4.1 General
B.4.2 Mechanical maintenance
58 B.4.3 Electrical maintenance test on stiles
B.4.4 Periodic electrical maintenance test on stiles
59 Annex C (normative)Type test procedure
C.1 General type test procedure
C.2 Independent type tests
C.3 Sequential type tests
61 Annex D (normative)Suitable for live working; double triangle(IEC 60417-5216:2002-10)
62 Annex E (informative)Rationale to explain how the stability of the leaning ladders is ensured
E.1 General
E.2 Rationale
E.3 Test method
E.3.1 General
63 E.3.2 Dimensional
E.3.3 Test sequence
64 E.3.4 Test results
E.4 Presentation and use of the different accessories
E.4.1 General presentation
E.4.2 Pole leaning device
E.4.2.1 Presentation
65 E.4.2.2 Determination of the coefficient
E.4.3 Clamp cleats with a rope
E.4.3.1 Presentation
66 E.4.3.2 Determination of the coefficient
E.4.4 Front type stabilizers
E.4.4.1 Presentation
67 E.4.4.2 Determination of the coefficient
68 E.4.5 Lateral type stabilizers
E.4.6 Adjustable levelling device

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BS EN 50528:2024
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