HD 21-2 : S3 AMD 1 2002

1. General
    1.1 Scope
    1.2 Applicable tests
    1.3 Classification of tests according to the
          frequency with which they are carried out
    1.4 Sampling
    1.5 Pre-conditioning
    1.6 Test temperature
    1.7 Test voltage
    1.8 Checking of the durability of colours and
          markings
    1.9 Measurement of insulation thickness
    1.10 Measurement of sheath thickness
    1.11 Measurement of overall dimensions and ovality
2. Electrical tests
    2.1 Electrical resistance of conductors
    2.2 Voltage test on completed cable
    2.3 Voltage test on cores
    2.4 Insulation resistance
    2.5 Long term resistance of insulation to direct
          current
    2.6 Test to check the absence of faults on
          insulation
    2.7 Screening efficiency
3. Test of mechanical strength of completed flexible
    cables
    3.1 Flexing test
    3.2 Bending test
    3.3 Snatch test
    3.4 Test for separation of cores
    3.5 Extension tests for extensible leads
    3.6 Endurance test for extensible leads
4. Tests under fire conditions
    4.1 Test for extensible leads
Annex A Normative references (Normative)
Annex B Procedure for checking the efficacy of the
          method of spark testing (Normative)
Annex C Measurement of sheath thickness for flat cords
          (Normative)
Annex D Calculation of minimum insulation resistance
          (Informative)
Annex E Bibliography (Informative)

Covers rigid and flexible cables with insulation and sheath, if any, based on polyvinyl chloride, of rated voltages U[0]/U up to and including 450/750 V used in power installations of nominal voltage not exceeding 450/750 V a.c.