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Harmonised codes for flexible mains cables
Flexible mains cables can be identified by the harmonised code, usually printed or embossed along the cable.
The code consists of a number of alphanumeric characters, each group representing a different aspect of the cable. The groups identify the construction, voltage rating, and the number and size of conductors. An example code is shown below.
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H | 0 | 7 | |
R | N | - | - | |
F | |
3 | G | |
0 | 1 | 0 |
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The possible characters in each position are outlined in the table below. It is worth remembering that not all positions may be used in a code. In the example above, the last two charcters in the second group are not utilised. This code would be printed or embossed on the cable as H07RNF3G010.
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Harmonised cable code | ||
| Group 1 | |||
|---|---|---|---|
| Character 1 | Cable Types | ||
| H | Harmonised | ||
| A | Other standard | ||
| Character 2&3 | Voltage rating (conductor / outer jacket) | ||
| 03 | 300V / 300V | ||
| 05 | 300V / 500V | ||
| 07 | 450V / 750V | ||
| Group 2 | |||
| Character 1 | Conductor insulation | ||
| V | PVC | ||
| R | Rubber (natural or synthetic) | ||
| N | Polychloroprene rubber | ||
| S | Silicone rubber | ||
| J | Glass fibre construction | ||
| Character 2 | Cable jacket | ||
| V | PVC | ||
| R | Rubber (natural or synthetic) | ||
| N | Polychloroprene rubber | ||
| T | Textile construction | ||
| Character 3 | Special component | ||
| D3 | Rarely used | ||
| Character 4 | Construction detail | ||
| H | Flat separate cable | ||
| H2 | Flat non-separate cable | ||
| Group 3 | |||
| Character 1 | Conductor construction | ||
| U | Solid | ||
| R | Stranded | ||
| K | Fine wire for stationary installation | ||
| F | Fine wire for flexible cordage | ||
| H | Extra-fine wire for flexible cordage | ||
| Y | Tinsel cord | ||
| Group 4 | |||
| Character 1 | Number of conductors | ||
| . | 3 etc | ||
| Character 2 | ground conductors | ||
| G | With ground conductors | ||
| X | Without ground conductors | ||
| Group 5 | |||
| Characters 1-3 | Cross-sectional area of conductors in mm² | ||
| ... | 075 etc | ||
So our example above would be a harmonised cable [H], with conductors rated at 450V and jacket at 750V [07]. The conductor insulation is rubber [R] and the cable jacet is polychloroprene rubber [N]. Each conductor is constructed from fine wire [F] and so is flexible cord. The three conductors with ground conductor [3G] are each 10mm² in cross sectional area [010].
See also:
- Other Electrical reference information
- Main Technical reference index
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