EN 50525-2-81-2011 pdf download.Electric cables -Low voltage energy cables of rated voltages up to and including 450/750 V (U0IU) -Part 2-81: Cables for general applications -Cables with crosslinked elastomeric covering for arc welding.
This EN 50525-2-81 applies to single core, crosslinked elastomer covered arc welding cables.
The cables are of rated voltage UJU 100/100 V.
The cables are intended for connections between the welding power source and the electrode holder and the work piece.
Two types of cable are included, with respectively Class 0 and Class E conductors. These conductors are more flexible than Class 6 to EN 60228, with Class E having the greater flexibility.
The maximum conductor operating temperature for each of the cables in this standard is
85 °C.
NOTE HO 516 contains extensive guidance on the sale use of cables in this standard, and gives specific current ratings and volt drop data
This EN 50525-2-8 1 should be read in conjunction with EN 50525-1, which specifies general requirements.
2 Normative references
The following referenced documents are indispensable for the application 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.
NOTE One oi more references to the standards below are In respect of a specific sub-division of that standard, for Instance a clause, a table, a class or a type. Cross-references to these standards are undated and, at all times, the latest version shall apply.
EN 50363-1 Insulating, sheathing and covering materials for low voltage energy cables — Part 1: Cross-linked elastomeric insulating
compounds
EN 50363-2-2 Insulating, sheathing and covering materials for low voltage energy cables — Part 2-2: Cross-linked elastomeric covering
compounds
EN 50395 Electrical test methods for low voltage energy cables
EN 50396 Non electrical test methods for low voltage energy cables
EN 50525-1 Electric cables — Low voltage energy cables of rated voltages up to and including 450/750 V (UJLI) — Part 1: General requirements
EN 60228 Conductors of insulated cables (IEC 60228)
EN 60332-1-2 Tests on electric and optical fibre cables under fire conditions — Part 1-2: Test for vertical flame propagation for a single insulated wire or cable — Procedure for 1 kW pre-mixed flame
(IEC 60332-1-2)
EN 60811-1-4 Insulating and sheathing materials of electric and optical cables — Common test methods — Part 1-4: General application — Tests at low temperature (IEC 6081 1-1-4)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in Clause 3 of EN 50525-1 apply.
4 Arc welding cables — HOIN2-D and HOIN2-E
4.1 Construction
4.1.1 Conductor
The conductor shall be copper, and generally in accordance with class 6 to EN 60228. except that the maximum diameter of wires in a conductor shall comply with the requirements given in column 2 of Table B. 1 for cables with normal flexibility, or of Table B.2 for cables with extra high flexibility.
NOTE The individual wires of a conductor may be plain or tinned,
A separator of suitable material shall be applied around the conductor.
4.1.2 Size of cable
The cable shall consist of a single conductor in accordance with Table B.1 or Table B.2, in
sizes from 10 mm2 to 240 mm2.
4.1.3 Covering
The covering shall be applied by extrusion around the conductor and may consist of one or two layers.
Covering in one layer shall be material type EM 5 to EN 50363-2-2.
Covering in two layers shall comprise an outer layer of material type EM 5 to EN 50363-2-2 and an inner layer which shall be either of type EM 5 or of material type El 7 to EN 50363-1. The ratio of the thicknesses of the two layers is not specified, but the minimum thickness of the outer layer shall not be less than 0,6 mm.
4.1.4 Marking
The cable shall be marked with the CENELEC code HO1N2-D for cables with normal flexibility, or HO1N2-E for cables with extra high flexibility. In addition, the cross-sectional area of the conductor shall be marked. The marking shall comply with Clause 6 of EN 50525-1.
4.2 Requirements
4.2.1 General
Each cable shall comply with the appropriate requirements given in EN 50525-1, and the particular requirements of this Part.
Testing shall be in accordance with Annex A.
The conductor resistance shall not exceed the relevant value given in column 6 or 7 of Table B.1 or Table B.2 as appropriate.
The thickness of the covering in one layer or the combined thickness of covering in the two layers shall comply with the specified value given in column 3 of either Table B.1 or Table B2 as appropriate.
The dimensions of the cables shall be within the limits specified in columns 4 and 5 of either Table B.1 or Table 8.2 as appropriate.EN 50525-2-81-2011 pdf download.

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