BS 7211 Standards H05Z-U/H07Z-U

Application and Description

These BS 7211 Standards 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 voltage: 300/500v (H05Z-U), 450/750v (H07Z-U)
-Test voltage: 2000 / 2500 volts
-Flexing bending radius: 15 x Ø
-Static bending radius: 10 x Ø
-Flexing temperature: +5º C to +90º C
-Short circuit temperature: +250º C
-Insulation resistance: 10 MΩ x km
Flame retardant: 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 test: flame-retardant acc. to EN 50265-2-1, IEC 60332.1

Cable Parameter

AWG	No. of Cores x Nominal Cross Sectional Area	Nominal Thickness of Insulation	Nominal Overall Diameter	Nominal Copper Weight	Nominal Weight	Minimum insulation resistance at 90 °C
	# x mm²	mm	mm	kg/km	kg/km	MΩ·km
			H05Z-U
20	1 x 0.5	0.6	1.9-2.4	4.8	8	0.015
18	1 x 0.75	0.6	2.1-2.6	7.2	12	0.012
17	1 x 1	0.6	2.2-2.8	9.6	14	0.011
			H07Z-U
16	1 x 1.5	0.7	2.6-3.3	14.4	20	0.011
14	1 x 2.5	0.8	3.2-4.0	24	30	0.010
12	1 x 4	0.8	3.6-4.6	38	45	0.0085
10	1 x 6	0.8	4.1-5.2	58	65	0.0070
8	1 x 10	1.0	5.3-6.6	96	105	0.0070