Heavy duty cables – H07BN4-F

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Heavy duty cables – H07BN4-F

6.4 Heavy duty cables – H07BN4-F

6.4.1 Construction

6.4.1.1 Conductor

The conductor shall be class 5, according to EN 60228.

6.4.1.2  Sizes of cable

The sizes of cable shall be:

-      Single core – 1,5 mm2 to 630 mm2;

-      2 and 5 core – 1,0 mm2 to 25 mm2;

-      3 and 4 core – 1,0 mm2 to 300 mm2.

6.4.1.3  Insulation
The  insulation  shall  be  a  cross-linked  elastomeric  compound,  Type  EI 7  to  EN  50363-1
applied around each conductor.
NOTE  It is permitted to apply a tape on each core.

Where the insulation is covered with a tape, it shall be applied in such a manner that it can be
removed without damage to the insulation.

6.4.1.4  Assembly

The cores of cables having two to five cores shall be twisted together.

NOTE 1  A centre filler may be used.


NOTE 2  A tape may be applied around the core assembly before application of the sheath.
6.4.1.5  Sheath


The cores shall be covered with a sheath.
a)   For cables with a specified sheath thickness up to and including 2,4 mm:
1) sheath in  a  single  layer,  cross-linked  elastomeric  compound  of  type EM 7  to EN
50363-2-1.
b)   For cables with a specified sheath thickness greater than 2,4 mm:

1) sheath either in a single layer, cross-linked elastomeric compound of type EM 7 to EN 50363-2-1;
2) or in two layers, with the inner layer made of one of the cross-linked elastomeric compounds
type EM 7 or EM 6 to EN 50363-2-1 and the outer layer of the cross- linked elastomeric compound
type EM 7 to EN 50363-2-1.


The sheath applied in a single layer or the inner layer of the sheath in two layers shall, for
cables with two to five cores, fill the spaces between the cores. Where a tape of suitable material
is applied around the core assembly (see NOTE 2 to 6.4.1.4) this requirement shall not apply,
provided that the finished cables shall not have any substantial cavity in the outer interstices
between the cores.
6.4.1.6  Marking
The cable shall be marked with the CENELEC code H07BN4-F. The marking shall comply
with Clause 6 of EN 50525-1.

6.4.2  Requirements
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 Table A.2, column 9.

NOTE  For non-electrical tests on sheaths in two layers see EN 50525-1, 5.7.2.3, c).

The dimensions of the cables shall conform to Table B.2 for the relevant size.
The requirements to be met for the compatibility test shall be as given in Table C.2.

6.5  Heavy duty multicore cables – H07BN4-F
6.5.1  Construction

6.5.1.1  Conductor
The conductor shall be class 5, according to EN 60228.
6.5.1.2  Sizes of cable

The sizes of cable shall be:

-      6, 7, 12, 18, 24 and 36 core – 1,5 mm2 and 2,5 mm2;

-      6, 7, 12 and 18 core – 4 mm2.
NOTE The number of cores given here is preferred. Other numbers of cores are permitted up to the
maximum number stated in the table for the given size of conductor, subject to agreement between
the purchaser and manufacturer. See also footnote c to Table B.3.

6.5.1.3  Insulation

The insulation shall be a cross-linked elastomeric compound, Type EI 7 to  EN  50363-1, applied
around each conductor.

The identification of each core shall be in accordance with EN 50525-1, Annex D.

6.5.1.4  Assembly

The cores shall be twisted together. A single core in the centre is not permitted. A protective
conductor, if any, shall be applied in the outer layer. A centre filler shall be used for cables
having 6, 7, 18, and 36 cores, and also for 19 cores when this non-preferred size is used.

NOTE 1  A centre filler may be used for other sizes.


NOTE 2  A tape may be applied around the core assembly before application of the sheath.

6.5.1.5  Sheath

The core assembly shall be covered with a sheath. The sheath shall be applied either in a single
layer, cross-linked elastomeric compound EM 7 to EN 50363-2-1, or in two layers, with the inner
layer made of one of the cross-linked elastomeric compounds EM 7 or EM 6 to EN 50363-2-1  and  the 
outer   layer   of   cross-linked   elastomeric   compound   EM   7   to EN 50363-2-1.

The sheath in a single layer or the inner layer of the sheath in two layers shall fill the spaces
between the cores. W here a tape of suitable material is applied around the core assembly

(see NOTE 2 to 6.5.1.4) this requirement shall not apply, provided that the finished cables
shall not have any substantial cavity in the outer interstices between the cores.
6.5.1.6  Marking
The cable shall be marked with the CENELEC code H07BN4-F. The marking shall comply with Clause 6 of
EN 50525-1.

6.5.2  Requirements

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 Table A.1, column 10.

NOTE  For non-electrical tests on sheaths in two layers see EN 50525-1, 5.7.2.3, c).

The dimensions of the cables shall conform to Table B.3 for the relevant size.
The requirements to be met for the compatibility test shall be as given in Table C.2.

[Dakshesh Maalolan]