3x2,5 NHXMH
3x2,5 NHXMH is a DIN VDE type names (Germany) cable designation: N = German national (VDE) type; HX = Crosslinked polyethylene insulation 2XI1 (DIN VDE 0276-604), halogen-free: 0,5 mm at 1,5 and 2,5 mm², 0,6 at 4 and 6, 0,7 at 10 and 16, 0,9 at 25 and 35 mm² (DIN VDE 0250-214 Table 1); MH = Sheath of the halogen-free thermoplastic HM2 (Annex A, 70 °C), 1,4 to 1,8 mm, over a halogen-free common covering, 0,4 to 1,4 mm (it may be left off a single core) (DIN VDE 0250-214 5.6, 5.7, Table 1); 3X2,5 = 2.5 mm², 3 cores, one of them green-yellow (protective); NHXMH = NHXMH: halogen-free installation cable with improved behaviour in a fire, the type of DIN VDE 0250-214. U0/U 300/500 V (clause 4); laying after DIN VDE 0298-3 (clause 7). DIN VDE 0250-214:2002-04 (1 core 1,5 to 16 mm², 2 to 5 cores 1,5 to 35 mm², 7 cores 1,5 and 2,5 mm², 5.1; bare copper, solid class 1 to 10 mm², stranded class 2 from 16 mm², 5.2; mean overall diameter limits, Table 1, e.g. 3 x 1,5 mm²: 8,0 to 9,6 mm; tests, Table 2: 2 kV a.c. for 5 min, flame DIN EN 50266-2-4, corrosivity DIN EN 50267-2-2, smoke density DIN EN 50268-2).
1 coding system recognises this code
DIN VDE type names (Germany)
| Symbol | Meaning |
|---|---|
N | German national (VDE) type |
HX | Crosslinked polyethylene insulation 2XI1 (DIN VDE 0276-604), halogen-free: 0,5 mm at 1,5 and 2,5 mm², 0,6 at 4 and 6, 0,7 at 10 and 16, 0,9 at 25 and 35 mm² (DIN VDE 0250-214 Table 1) |
MH | Sheath of the halogen-free thermoplastic HM2 (Annex A, 70 °C), 1,4 to 1,8 mm, over a halogen-free common covering, 0,4 to 1,4 mm (it may be left off a single core) (DIN VDE 0250-214 5.6, 5.7, Table 1) |
3X2,5 | 2.5 mm², 3 cores, one of them green-yellow (protective) |
NHXMH | NHXMH: halogen-free installation cable with improved behaviour in a fire, the type of DIN VDE 0250-214. U0/U 300/500 V (clause 4); laying after DIN VDE 0298-3 (clause 7). DIN VDE 0250-214:2002-04 (1 core 1,5 to 16 mm², 2 to 5 cores 1,5 to 35 mm², 7 cores 1,5 and 2,5 mm², 5.1; bare copper, solid class 1 to 10 mm², stranded class 2 from 16 mm², 5.2; mean overall diameter limits, Table 1, e.g. 3 x 1,5 mm²: 8,0 to 9,6 mm; tests, Table 2: 2 kV a.c. for 5 min, flame DIN EN 50266-2-4, corrosivity DIN EN 50267-2-2, smoke density DIN EN 50268-2) |
What is NHXMH cable?
NHXMH: halogen-free installation cable with improved behaviour in a fire, the type of DIN VDE 0250-214. Rating: U0/U 300/500 V (clause 4); laying after DIN VDE 0298-3 (clause 7). Standard: DIN VDE 0250-214:2002-04 (1 core 1,5 to 16 mm², 2 to 5 cores 1,5 to 35 mm², 7 cores 1,5 and 2,5 mm², 5.1; bare copper, solid class 1 to 10 mm², stranded class 2 from 16 mm², 5.2; mean overall diameter limits, Table 1, e.g. 3 x 1,5 mm²: 8,0 to 9,6 mm; tests, Table 2: 2 kV a.c. for 5 min, flame DIN EN 50266-2-4, corrosivity DIN EN 50267-2-2, smoke density DIN EN 50268-2).
NHXMH-J has a green-and-yellow core, NHXMH-O none (3.2). The letter reading below this row is the DIN VDE 0250 letter code; this row is the type as the standard defines it.
Documents and pages the readings were taken from
- DIN VDE 0250-214:2002-04 (clauses 3 to 7 p. 4 to 6, Table 1 and Table 2)
DIN VDE type names (Germany): how to read the cable type names
Fire behaviour (EU CPR)
Halogen-free compound (HX, MH, NHXMH). Under the CPR this shows in the additional classes: acidity a1 to a3 (EN 60754-2) and smoke s1 to s3 (EN 50399; s1a and s1b add the 3 m cube test EN 61034-2). The main class, Aca to Fca, depends on the whole construction.
Typically targeted, as declared by makers for this kind of construction in the examples this site checked (not the class of this cable):
B2ca-s1a,d0,a11-CXKH-R-J, Kablo VrchlabíCca-s1b,d1,a1FG16(O)M16, Nexans (La Triveneta Cavi)B2ca-s1a,d1,a1FG18(O)M16, Nexans (La Triveneta Cavi)DcaFXQJ, Nexans NorwayCca-s1b,d1,a1H07Z1-K, Nexans SpainB2ca-s1,d2,a1AXQJ-RMF, Prysmian Sweden (12/20 kV)B2ca-s1a,d1,a1RZ1-K (AS), Top CableCca-s1b,d1,a1RZ1FZ1-K (AS), Top Cable
Listed as sources, alphabetically by maker. No maker pays to appear here.
A CPR class is declared by the maker in its Declaration of Performance and printed on the sheath (EN 50575 cl 7). This decoder does not assign one. What the CPR classes mean →
Sources: EN 13501-6 draft and FprEN 50575:2014 final draft (drafts, not the published texts); IEC 60332-3-24:2000+A1:2008; EN 13501-3 draft A2.
3x2,5 NHXMH: equivalents in other countries
Shown for 3x2.5 300/500 V. Each country's rules are applied to this build, keeping the conductor, section, cores, voltage, screen, armour and sheath.
| Country | Standard | Name in that country | Verdict | Differences |
|---|---|---|---|---|
| China | GB/T 9330 | WDZ-KYJY 3x2.5 450/750 V | Close | rated higher: 450/750 V (this cable 300/500 V); Insulation 0.5 → 0.7 mm; Inner covering / bedding material: not in the equivalent; Sheath 1.4 → 1.2 mm |
Nominal values computed by each standard's rules, not manufacturer data. This is not a statement that two cables are interchangeable: the buyer's specification and the maker's type test decide.
3x2,5 NHXMH as the cable designer builds it, 3x2.5 300/500 V
Overall diameter 9.6 mm, about 160 kg/km. Nominal values from the standard's tables for this size, computed, not a maker's data.
| Layer | Material | Thickness, mm | Over the layer, mm |
|---|---|---|---|
| Insulation | XLPE | 0.50 | 2.8 |
| Filler | Halogen-free (LSZH) | 6.0 | |
| Inner covering / bedding | Halogen-free (LSZH) | 0.40 | 6.8 |
| Sheath | Halogen-free (LSZH) | 1.4 | 9.6 |
3x2,5 NHXMH on a drum
The smallest drum that passes every check, for 9.6 mm and about 160 kg/km as the cable designer builds it. Drums as their makers print them; lengths are estimates: whole layers wound nested (each turn in the groove of the layer below), wound diameter 1.05 × OD, 50 mm freeboard under the flange rim. Cable makers' own tables print less, as they count aligned layers.
| Length | Drum size (its makers) | Layers | Gross weight |
|---|---|---|---|
| 500 m | KTG 6 (600 mm flange), plywood KTG drums (Europe), Bayka | 12 of 14 | 87 kg |
| 1,000 m | KTG 8 (800 mm flange), wood KTG drums (Europe), Bayka, KTG | 16 of 17 | 191–195 kg |
Barrel at least 15 × OD = 144 mm for a cable of this kind (Low voltage, multi-core): KTG table, the cable's datasheet wins. A load rating is the drum maker's own.
Other lengths, drums and weights: the cable drum calculator
Load it on a truck: 1000 m on its drum in the loading planner
Laying, sizes and datasheet: 3x2,5 NHXMH
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Work with 3x2,5 NHXMH
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