SIST EN 50363-3:2006

• Abstract:

  This part of EN 50363 specifies the requirements for the physical properties of the PVC insulating compounds given in Table 1. The relevant test methods are given in EN 60811 series and EN 50395.

• Status: Published
• Publication Date: 30-Apr-2006
• ICS: 29.035.20 - Plastics and rubber insulating materials
• ICS: 29.060.20 - Cables
• Technical Committee: IEKA - Electric cables
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-May-2006
• Due Date: 01-May-2006
• Completion Date: 01-May-2006
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
  OJ Ref: C 348/03 OJ Date: 28-Nov-2013
• Directive:

  ---

  2014/35/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
  OJ Ref: C 249/03, UMIK 13.6.2025 OJ Date: 08-Jul-2016
• Directive:

  ---

  73/23/EEC - Electrical equipment designed for use within certain voltage limits
• Ref Project: EN 50363-3:2005 - Insulating, sheathing and covering materials for low voltage energy cables - Part 3: PVC insulating compounds

• Referred By: SIST EN 50214:2024 - Flat flexible cables
• Effective Date: 03-Feb-2026
• Referred By: SIST EN 50143:2009 - Cables for signs and luminous-discharge-tube installations operating from a no-load rated output voltage exceeding 1 000 V but not exceeding 10 000 V
• Effective Date: 03-Feb-2026
• Amended By: SIST EN 50363-3:2006/A1:2011 - Insulating, sheathing and covering materials for low voltage energy cables - Part 3: PVC insulating compounds
• Effective Date: 01-May-2011

SIST EN 50363-3:2006 is the Slovenian adoption of EN 50363-3 from the European Committee for Electrotechnical Standardization (CENELEC). It specifies the physical property requirements for PVC insulating compounds used in low voltage energy cables, and it points users to the EN 60811 series and EN 50395 for the test methods. It is aimed at cable manufacturers, compound suppliers, test laboratories and specifiers who need to select or verify PVC insulation materials.

What does SIST EN 50363-3:2006 specify?

SIST EN 50363-3:2006 covers the PVC insulating compounds listed in Table 1 and the physical property requirements in Table 2. The standard is meant to be read together with EN 50363-0, which provides the common framework for this series.

The document is organized into four clauses:

• Clause 1 - scope
• Clause 2 - normative references
• Clause 3 - definitions
• Clause 4 - properties

Table 1 classifies the compound types TI 1 to TI 5 by intended use and maximum operating temperature. Table 2 gives the test programme and acceptance criteria for each type.

What are the key requirements of SIST EN 50363-3:2006?

Type classification

SIST EN 50363-3:2006 identifies five PVC insulating compound types, TI 1 to TI 5. The types cover general purpose, flexible, heat resistant, low-temperature installation, and general purpose flexible lower-temperature use. In practice, this lets the user match the compound to the cable's service conditions before testing begins.

Mechanical properties before and after ageing

Clause 4 requires each compound to meet tensile strength and elongation at break limits before ageing and after ageing in an air oven. The ageing test also checks how much the material's properties change after heat exposure. For a buyer or quality manager, this is the key check that the insulation keeps its mechanical performance over time.

Mass loss and thermal behaviour

Table 2 includes a loss of mass test after ageing, plus a heat shock test. These checks matter because they show whether the compound loses too much material under heat and whether it cracks when exposed to hot conditions. The table also includes a minimum thermal stability requirement at elevated temperature for one of the compound types.

Deformation under heat

SIST EN 50363-3:2006 includes a pressure test at high temperature. The result is limited by the depth of indentation, so the compound must resist excessive softening and deformation. In practice, this helps confirm that the insulation will keep its shape during processing and service.

Low-temperature performance

Table 2 specifies bending and elongation tests at low temperature. These tests show whether the compound stays flexible enough to be installed and handled in cold conditions without breaking. That is particularly relevant for cables laid or bent in low-temperature environments.

Electrical insulation performance

The standard also requires an insulation resistance test using EN 50395. This links the material specification to electrical performance, not only mechanical performance. For cable design and quality control, it confirms that the compound still functions as an insulating material.

What terms does SIST EN 50363-3:2006 define?

SIST EN 50363-3:2006 uses the definitions from EN 50363-0, and its main in-document terms are the compound types in Table 1.

• PVC - polyvinyl chloride, the insulating compound family covered by this part.
• TI 1 - a general purpose compound type.
• TI 2 - a flexible compound type, including transparent versions.
• TI 3 - a heat resistant compound type.
• TI 4 - a type intended for installation at low temperatures.
• TI 5 - a general purpose flexible type for lower-temperature use.

Who uses SIST EN 50363-3:2006?

SIST EN 50363-3:2006 is used by manufacturers of low voltage energy cables, suppliers of insulating compounds, and laboratories that test cable materials. It is also useful for quality assurance teams and buyers who need to specify a PVC compound type and check that it meets the required ageing, cold, heat and electrical tests.

What changed in SIST EN 50363-3:2006 from the previous edition?

The foreword says that EN 50363, in all its parts, supersedes the equivalent information in HD 21.1 S4, HD 21.14 S1, HD 22.1 S4, HD 22.10 S1, HD 22.14 S2 and prHD 21.15 S1. It also states that the existing information in those HDs will be deleted at the next maintenance review.

Which standards are used with SIST EN 50363-3:2006?

• EN 50363-0 - provides the common clauses for normative references, definitions and related test information for this series.
• EN 60811 series - provides the physical test methods used for the compound property checks.
• EN 50395 - provides the insulation resistance test used in Table 2.

What does the SIST EN 50363-3:2006 document contain?

SIST EN 50363-3:2006 contains the scope, the reference to common EN 50363-0 clauses, and the property requirements for PVC insulating compounds. Table 1 gives the compound types and their intended applications, while Table 2 sets out the test programme and acceptance criteria.

The test programme covers mechanical properties, ageing, loss of mass, heat shock, pressure at high temperature, low-temperature bending, low-temperature elongation, thermal stability and insulation resistance. The document uses methods from EN 60811 and EN 50395 so that the material checks are tied to standard cable test procedures.

SLOVENSKI SIST EN 50363-3:2006

STANDARD
maj 2006
Materiali za izoliranje, oplaščenje in prevleke nizkonapetostnih energetskih
kablov – 3. del: Polivinilkloridne (PVC) mase za izoliranje
Insulating, sheathing and covering materials for low voltage energy cables – Part 3:
PVC insulating compounds
ICS 29.035.20; 29.060.20 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 50363-3
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2005

ICS 29.035.20
English version
Insulating, sheathing and covering materials
for low voltage energy cables
Part 3: PVC insulating compounds

Matériaux pour enveloppe isolante, Isolier-, Mantel- und
gainage et revêtement pour les câbles Umhüllungswerkstoffe für
d'énergie basse tension Niederspannungskabel und -leitungen
Partie 3: Mélanges PVC pour enveloppe Teil 3: PVC-Isoliermischungen
isolante
This European Standard was approved by CENELEC on 2005-11-01. 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.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists 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 Central Secretariat has the same status as the official versions.

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

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50363-3:2005 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 20, Electric cables.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50363-3
on 2005-11-01.
EN 50363 (in all its parts) supersedes the equivalent information at present in HD 21.1 S4,
HD 21.14 S1, HD 22.1 S4, HD 22.10 S1, HD 22.14 S2 and prHD 21.15 S1. The existing information
in these HDs will be deleted at the next maintenance review.
EN 50363-3 should be read in conjunction with EN 50363-0.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-11-01

– 3 – EN 50363-3:2005
Contents
1 Scope.4
2 Normative references.4
3 Definitions.4
4 Properties.4
Table 1 – Types of PVC insulating compound .4
Table 2 – Requirements for the tests for PVC insulating compounds .5

1 Scope
This part of EN 50363 specifies the requirements for the physical properties of the PV
...