BS 7211 standard H05Z-U/H07Z-U

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Application and Description

These cables are designed for the internal wiring of switchboards and distributor boards with an alternating nominal voltage up to 1000 Volts or a direct voltage up to 750 volts. Generally install in pipes or ducts and internal wiring of appliances with maximum operating temperature of 90º C, and generally in areas (such as public and government buildings) where smoke and toxic fumes may cause a threat to life and equipment. The cables produce no corrosive gasses when burnt which is particularly important where electronic equipment is installed.

Cable Construction

  • Solid bare copper

  • single wire to IEC 60228 Cl-1

  • Cross-link polyolefin EI5 core insulation

  • LSOH - low smoke, zero halogen

Insulation Colour

Green/Yellow, Black, Blue, Brown, Red, White, Yellow, Grey, Violet

Technical Characteristics

Working voltageTest voltageFlexing bending radiusStatic bending radiusFlexing temperatureShort circuit temperatureInsulation resistanceFlame retardant  Flame test
300/500v (H05Z-U), 450/750v (H07Z-U)
2000 / 2500 volts
15 x Ø
10 x Ø
+5 ºC to +90 ºC
+250 ºC
10 MΩ x km
IEC 60332.1
Smoke density acc. to EN 50268 / IEC 61034
Corrosiveness of combustion gases acc. to EN 50267-2-2, IEC 60754-2
Flame-retardant acc. to EN 50265-2-1, IEC 60332.1

Cable Parameter

AWGNo. of Cores x Nominal Cross Sectional AreaNominal Thickness of InsulationNominal Overall DiameterNominal Copper WeightNominal WeightMinimum insulation resistance at 90 °C# x mm²mmmmkg/kmkg/kmMΩ·km
H05Z-U
201 x 0.50.61.9-2.44.880.015
181 x 0.750.62.1-2.67.2120.012
171 x 10.62.2-2.89.6140.011
H07Z-U
161 x 1.50.72.6-3.314.4200.011
141 x 2.50.83.2-4.024300.010
121 x 40.83.6-4.638450.0085
101 x 60.84.1-5.258650.0070
81 x 101.05.3-6.6961050.0070


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Addison Technology Ltd
Phoenix Place, North Street, shanghai, United Kingdom / 200007
Fax: 44-207-8913489
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