IEC 62821-3-2015 pdf download - IEC Standard Free Download

IEC 62821-3-2015 pdf download.Electric cables – Halogen-free, low smoke, thermoplastic insulated and sheathed cables of rated voltages up to and including 450/750 V – Part 3: Flexible cables (cords).
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62821 -1 apply.
4 General purpose cables
4.1 Light duty, halogen-free, low smoke flexible cables
4.1.1 Code designation
62821 IEC 1 01 for circular cable and 62821 IEC 1 01 f for flat cable.
4.1 .2 Rated voltage
• 300/300 V
4.1 .3 Construction
4.1 .3.1 Conductor
The conductor shall comply with Class 5, according to IEC 60228.
4.1.3.2 Sizes of cable
The sizes of cable shall be:
a) circular cable: 0,5 mm 2 and 0,75 mm 2 – 2, 3 and 4 core;
b) flat cable: 0,5 mm 2 and 0,75 mm 2 – 2 core only.
4.1.3.3 Insulation
The insulation shall be thermoplastic compound of LSHF/D to IEC 62821 -1 .
4.1.3.4 Assembly
The cores shall be assembled as follows:
a) circular cable: the cores shall be twisted together;
b) flat cable: the cores shall be laid parallel.
A halogen-free tape may be applied around the core assembly before application of the sheath.
4.1.3.5 Sheath
The sheath shall be a thermoplastic compound of Type LSHF/ST1 to IEC 62821 -1 .
The sheath shall not adhere to the cores. The assembly of cores may be surrounded by a separator which shall not adhere to the cores.
For circular cables, the application of the sheath shall give the finished cable a practically circular shape.
4.1.3.6 Marking
The circular cable shall be marked with the code 62821 IEC 1 01 , and the flat cable shall be marked with the code 62821 IEC 1 01 f.
The marking shall comply with Clause 5 of IEC 62821 -1 :201 5.
4.1.4 Requirements
Each cable shall comply with the appropriate requirements given in IEC 62821 -1 and the particular requirements of this standard.
Testing shall be in accordance with Annex A, and the relevant tests indicated in Column 6 in Table A.1 .
a) The surface resistance of sheath shall comply with the minimum requirement of 1 0 9 Ω.
b) The dimensions of the cables shall conform to Table B.1 for type 1 01 and 1 01 f.
c) The requirements to be met for the compatibility test shall be as given in Annex C.
d) When tested in accordance with the method and procedure given in IEC 61 034-2, all sizes
of cable shall exceed 60 % light transmittance throughout the test.
4.2 Ordinary duty, halogen-free, low smoke flexible cables
4.2.1 Code designation
62821 IEC 1 02 for circular cable and 62821 IEC 1 02f for flat cable.
4.2.2 Rated voltage
• 300/500 V
4.2.3 Construction
4.2.3.1 Conductor
The conductor shall comply with Class 5, according to IEC 60228.
4.2.3.2 Sizes of cable
The sizes of cable shall be:
a) circular cable: 0,75 mm 2 to 4 mm 2 – 2, 3, 4 and 5 core
b) flat cable: 0,75 mm 2 and 1 ,0 mm 2 – 2 core only.
4.2.3.3 Insulation
The insulation shall be thermoplastic compound of Type LSHF/D to IEC 62821 -1 .
4.2.3.4 Assembly
The cores shall be assembled as follows:
a) circular cable: the cores, and the fillers if any, shall be twisted together.
b) flat cable: the cores shall be laid parallel.
For cable having two cores, the space between the cores shall be filled either by separate halogen-free fillers or by the sheath filling the interstices.IEC 62821-3 pdf download.