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BS 6480:1988 Specification for impregnated paper-insulated lead or lead alloy sheathed electric cables of rated voltages up to and including 33000 V, 2003
- BRITISH STANDARD [Go to Page]
- Committees responsible for this British Standard
- Contents
- 1 Scope
- 2 Definitions [Go to Page]
- rated voltage, U
- rated voltage, U
- maximum voltage, U
- nominal value
- approximate value
- 3 Voltage designation
- 4 Conductors
- 5 Conductor screening
- 6 Insulation [Go to Page]
- 6.1 General
- 6.2 Material
- 6.3 Method of application
- 6.4 Thickness of paper
- 6.5 Thickness of insulation
- 7 Identification of cores
- 8 Insulation screening
- 9 Laying-up [Go to Page]
- 9.1 General
- 9.2 Belted cables
- 9.3 Screened cables
- 9.4 Screened SL cables
- 9.5 Direction of lay
- 10 Impregnation [Go to Page]
- 10.1 General
- 10.2 Drainage test
- 10.3 Breaking load and elongation at break of impregnated paper [Go to Page]
- Maximum drainage
- 11 Identification of manufacturer
- 12 Lead or lead alloy sheath [Go to Page]
- 12.1 A lead or lead alloy sheath shall be extruded over the impregnated cable.
- 12.2 The composition of the lead or lead alloy sheath, (see A.3), shall be in accordance with BS 801.
- 12.3 The lead or lead alloy sheath shall be impervious to moisture, reasonably close-fitting and free from defects.
- 12.4 The minimum thickness of the lead or lead alloy sheath measured in accordance with E.2 shall not fall below the appropriate value given in Table 11 to Table 38 by an amount more than (5 % plus 0.1 mm), (0.05 mm rounded upwards).
- 13 Bedding [Go to Page]
- 13.1 Lapped bedding
- 13.2 Extruded bedding
- 14 Armour [Go to Page]
- 14.1 General
- 14.2 Steel tape armour
- 14.3 Single-wire armour [Go to Page]
- Mass of zinc coating
- 14.4 Double-wire armour
- 15 Serving and oversheath [Go to Page]
- 15.1 Oversheath for unarmoured cables
- 15.2 Serving for armoured cables
- 15.3 Oversheath for armoured cables
- 16 Compounds for lapped bedding and serving
- 17 Cable markings [Go to Page]
- 17.1 General
- 17.2 Marking of oversheathed cables
- 17.3 Identification of 600/1 000 V cables
- 17.4 End markings
- 18 Sealing and drumming
- 19 Schedule of tests [Go to Page]
- Schedule of tests
- 20 Test conditions [Go to Page]
- 20.1 Ambient temperature
- 20.2 Frequency and waveform of power-frequency test voltages
- 21 Routine tests [Go to Page]
- 21.1 General [Go to Page]
- Routine tests
- 21.2 Conductor resistance
- 21.3 Power factor, tand [Go to Page]
- Power factor, tan d, of 19 000/33 000 V cables
- 21.4 Voltage test on complete cable
- 21.5 D.C. voltage test on oversheath [Go to Page]
- Test voltage on completed cable at works
- 22 Regular sample tests [Go to Page]
- Regular sample tests
- 23 Special sample tests [Go to Page]
- 23.1 General [Go to Page]
- Special sample tests
- 23.2 Bending test [Go to Page]
- Papers containing tears
- 24 Type tests [Go to Page]
- 24.1 General [Go to Page]
- Type tests
- 24.2 Type tests for 19 000/33 000 V cables [Go to Page]
- 600/1 000 V (
- 600/1 000 V (
- 600/1 000 V (
- 600/1 000 V (
- 600/1 000 V (
- 600/1 000 V (
- 600/1 000 V (
- 600/1 000 V (
- 600/1 000 V (
- 600/1 000 V (
- 1 900/3 300 V (
- 1 900/3 300 V (
- 3 300/3 300 V (
- 3 800/6 600 V (
- 3 800/6 600 V (
- 6 600/6 600 V (
- 6 350/11 000 V (
- 6 350/11 000 V (
- 6 350/11 000 V (
- 8 700/11 000 V (
- 8 700/15 000 V (
- 8 700/15 000 V (
- 12 700/22 000 V (
- 12 700/22 000 V (
- 12 700/22 000 V (
- 19 000/33 000 V (
- 19 000/33 000 V (
- 19 000/33 000 V (
- Calculated values of minimum thickness of extruded layers
- Recommendations for the selection of paper insulated cables [Go to Page]
- Recommendations for the selection of paper insulated cables
- Voltage rating
- Non-draining cables [Go to Page]
- Selection of cables for a.c. systems
- Lead or lead alloy sheath
- Protective coverings [Go to Page]
- Lapped coverings
- Extruded oversheath on unarmoured cables
- Extruded coverings for armoured cables
- Graphite layer on oversheath
- Current ratings [Go to Page]
- Cables installed in and around buildings
- Other cables
- Short-circuit ratings
- Recommendations for the installation of paper insulated cables [Go to Page]
- Recommendations for the installation of paper insulated cables
- Compliance with regulations
- Minimum temperature during installation
- Minimum installation radius [Go to Page]
- Minimum bending radius during installation
- Minimum bending radius for 19 000/33 000 V cables adjacent to joints or terminals
- Prevention of moisture ingress
- Tests on commissioning [Go to Page]
- Tests on cable [Go to Page]
- Test voltages on commissioning
- Test on oversheath
- Type tests for 19 000/33 000 V cables [Go to Page]
- Type tests for 19 000/33 000 V cables
- Preliminary procedure
- Loading cycle test [Go to Page]
- Test installation
- Procedure
- Impulse voltage test [Go to Page]
- Test installation
- Principle
- Detailed test method
- Resistance values of phase conductor, and lead or lead alloy sheath and single-wire armour of 600/1 000 V cables [Go to Page]
- Resistance values of phase conductor, and lead or lead alloy sheath and single-wire armour of 600/1 000 V cables [Go to Page]
- D.C. conductor resistance at 20 °C and d.c. resistance at 20 °C of lead or lead alloy sheath of 600/1 000 V single-core cables
- D.C. conductor resistance at 20 °C and d.c. resistance at 20 °C of lead or lead alloy sheath and single steel wire armour of 600/1 000 V cables: two-core stranded conductor cable
- D.C. conductor resistance at 20 °C and d.c. resistance at 20 °C of lead or lead alloy sheath and single steel wire armour of 600/1 000 V cables: two-core solid conductor cable
- D.C. conductor resistance at 20 °C and d.c. resistance at 20 °C of lead or lead alloy sheath and single steel wire armour of 600/1 000 V cables: three-core stranded conductor cable
- D.C. conductor resistance at 20 °C and d.c. resistance at 20 °C of lead or lead alloy sheath and single steel wire armour of 600/1 000 V cables: three-core solid conductor cable
- D.C. conductor resistance at 20 °C and d.c. resistance at 20 °C of lead or lead alloy sheath and single steel wire armour of 600/1 000 V cables: four-cores of equal area stranded conductor cable
- D.C. conductor resistance at 20 °C and d.c. resistance at 20 °C of lead or lead alloy sheath and single steel wire armour of 600/1 000 V cables: four-cores of equal area stranded conductor cable
- D.C. conductor resistance at 20 °C and d.c. resistance at 20 °C of lead or lead alloy sheath and single steel wire armour of 600/1 000 V cables: four-core including a reduced neutral conductor stranded conductor cable
- D.C. conductor resistance at 20 °C and d.c. resistance at 20 °C of lead or lead alloy sheath and single steel wire armour of 600/1 000 V cables: five-core including a special purpose conductor stranded conductor cable
- Methods of test [Go to Page]
- Methods of test
- Measurement of insulation thickness [Go to Page]
- Cables of voltage rating up to 12 700/22 000 V
- Cables of voltage rating 19 000/33 000 V
- Measurement of lead or lead alloy sheath thickness
- Measurement of thickness (excluding insulation and metallic sheath) [Go to Page]
- Sampling
- Test procedure
- Measurement of diameter of round wire armour
- Mass of zinc coating of galvanized steel wire
- Bending test [Go to Page]
- Sampling
- Procedure [Go to Page]
- Diameter of test cylinder
- Measurement of breaking load and elongation at break of impregnated paper
- Test for water soluble impurities in insulating paper
- Information to be provided with enquiry or order [Go to Page]
- Information to be provided with enquiry or order [Go to Page]
