FprEN IEC 62305-3:2024

Protection against lightning - Part 3: Physical damage to structures and life hazard

2019-09-03: IEC voting results negative: back to CD stage expected

Blitzschutz - Teil 3: Schutz von baulichen Anlagen und Personen

Protection contre la foudre - Partie 3: Dommages physiques sur les structures et risques humains

Zaščita pred delovanjem strele - 3. del: Fizična škoda na zgradbah in življenjska ogroženost

General Information

• Status: Not Published
• Publication Date: 14-Jul-2024
• Withdrawal Date: 18-Aug-2019
• ICS: 29.020 - Electrical engineering in general
• ICS: 91.120.40 - Lightning protection
• Technical Committee: CLC/TC 81X - Lightning protection
• Drafting Committee: CLC/TC 81X/WG 02 - Lightning protection components
• Current Stage: 5060 - Voting results sent to TC, SR - Formal Approval
• Start Date: 12-Apr-2024
• Completion Date: 12-Apr-2024
• Ref Project: kSIST FprEN IEC 62305-3:2024 - Protection against lightning - Part 3: Physical damage to structures and life hazard

Relations

• Revises: EN 62305-3:2011 - Protection against lightning - Part 3: Physical damage to structures and life hazard
• Effective Date: 08-Aug-2017

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN IEC 62305-3:2023
01-december-2023
Zaščita pred delovanjem strele - 3. del: Fizična škoda na zgradbah in življenjska
ogroženost
Protection against lightning - Part 3: Physical damage to structures and life hazard
Blitzschutz - Teil 3: Schutz von baulichen Anlagen und Personen
Protection contre la foudre - Partie 3: Dommages physiques sur les structures et risques
humains
Ta slovenski standard je istoveten z: prEN IEC 62305-3:2023
ICS:
91.120.40 Zaščita pred strelo Lightning protection
oSIST prEN IEC 62305-3:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 62305-3:2023
oSIST prEN IEC 62305-3:2023
81/735/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62305-3 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-10-13 2023-12-08
SUPERSEDES DOCUMENTS:
81/688/CDV, 81/713B/RVC
IEC TC 81 : LIGHTNING PROTECTION
SECRETARIAT: SECRETARY:
Italy Mrs Marina Bernardi
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

SC 31J,SC 37A,TC 64,TC 88
Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE 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:
Protection against lightning - Part 3: Physical damage to structures and life hazard

PROPOSED STABILITY DATE: 2027
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.

oSIST prEN IEC 62305-3:2023
IEC CDV 62305-3 © IEC 2023 2 81/735/CDV

NOTE FROM TC/SC OFFICERS:
the document "with changes" is uploaded as help, with tracking of all modifications.
oSIST prEN IEC 62305-3:2023
81/735/CDV 3 IEC CDV 62305-3 © IEC 2023

2 CONTENTS
4 FOREWORD . 8
5 INTRODUCTION . 10
6 1 Scope . 11
7 2 Normative references . 11
8 3 Terms and definitions . 12
9 4 Lightning protection system (LPS) . 17
10 4.1 Class of LPS . 17
11 4.2 Design of the LPS . 18
12 5 External lightning protection system . 18
13 5.1 General . 18
14 5.1.1 Application of an external LPS . 18
15 5.1.2 Application of an isolated LPS or an electrically insulated LPS . 18
16 5.1.3 Use of natural components . 19
17 5.2 Air-termination systems . 19
18 5.2.1 General . 19
19 5.2.2 Positioning . 19
20 5.2.3 Air terminations against flashes to the side of tall structures . 23
21 5.2.4 Construction . 24
22 5.2.5 Natural components . 24
23 5.3 Down-conductor systems . 27
24 5.3.1 General . 27
25 5.3.2 Positioning of an isolated LPS . 27
26 5.3.3 Positioning of an attached LPS . 27
27 5.3.4 Construction . 28
28 5.3.5 Natural components . 29
29 5.3.6 Test joints and test points . 30
30 5.4 Earth-termination system . 31
31 5.4.1 General . 31
32 5.4.2 Earthing arrangement in general conditions . 31
33 5.4.3 Installation of earth electrodes . 33
34 5.4.4 Natural earth electrodes . 34
35 5.5 Components . 34
36 5.5.1 General . 34
37 5.5.2 Fixing . 35
38 5.5.3 Connections . 35
39 5.5.4 Insulating components . 36
40 5.6 Materials and dimensions . 36
41 5.6.1 Materials . 36
42 5.6.2 Dimensions . 36
43 6 Internal lightning protection system . 39
44 6.1 General . 39
45 6.2 Lightning equipotential bonding . 39
46 6.2.1 General . 39
47 6.2.2 Lightning equipotential bonding for metal installations . 40

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48 6.2.3 Lightning equipotential bonding for external conductive parts . 41
49 6.2.4 Lightning equipotential bonding for internal systems . 41
50 6.2.5 Lightning equipotential bonding for lines connected to the structure to
51 be protected . 42
52 6.3 Separation distance . 42
53 6.3.1 General approach . 42
54 6.3.2 Simplified approach . 44
55 7 Maintenance and inspection of an LPS . 44
56 7.1 General . 44
57 7.2 Maintenance . 44
58 7.3 Objective of inspections . 45
59 7.4 Need for inspection . 45
60 8 Protection measures against injury to human beings due to touch and step
61 voltages . 46
62 8.1 Protection measures against touch voltages . 46
63 8.2 Protection measures against step voltages . 46
64 Annex A (normative) Minimum cross-section of the entering cable screen to avoid
65 dangerous sparking . 48
66 Annex B (informative) Evaluation of the separation distance s . 49
67 Annex C (normative) Additional information for LPSs in the case of structures with a
68 risk of explosion . 55
69 C.1 General . 55
70 C.2 Basic requirements . 55
71 C.2.1 General . 55
72 C.2.2 Required information . 55
73 C.2.3 Earthing . 55
74 C.2.4 Equipotential bonding . 56
75 C.3 Structures containing solid explosive material . 56
76 C.4 Structures containing hazardous areas . 56
77 C.4.1 General . 56
78 C.4.2 Structures containing zones 2 and 22 . 57
79 C.4.3 Structures containing zones 1 and 21 . 57
80 C.4.4 Structures containing zones 0 and 20 . 58
81 C.4.5 Specific applications . 58
82 C.5 Maintenance and inspection . 59
83 C.5.1 General . 59
84 C.5.2 General requirements . 59
85 C.5.3 Qualifications . 59
86 C.5.4 Inspection requirements . 59
87 C.5.5 Electrical testing requirements . 60
88 C.5.6 Earthing resistance test methods . 60
89 C.5.7 Surge protection . 60
90 C.5.8 Repairs . 61
91 C.5.9 Records and documentation . 61
92 Annex D (informative) Explanatory text concerning the design, construction,
93 maintenance and inspection of lightning protection systems . 62
94 D.1 General . 62
95 D.2 Structure of Annex D . 62
96 D.3 Additional information . 62

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97 D.4 Design of lightning protection systems (LPSs) . 62
98 D.4.1 General remarks . 62
99 D.4.2 Design of the LPS .
...