IS 1554 : Part 1 : 1988 PVC insulated (heavy duty) electric cables: Part 1 For working voltages upto and including 1 100 V

1 Scope

1.1 This standard (Part 1) covers requirements and tests forarmoured and unarmored single-core, twin-core, three-core andmulti-core PVC insulated and sheathed cables for electric supplyand control purposes.

1.2 The cables covered in this standard are suitable for use onac single phase or three phase (earthed or unearthed) systems forrated voltages up to and including 1100 V. These cables may be usedon d.c. systems for rated voltages up to and including 1500 V toearth.

Note - The cables conforming to this standard may be operatedcontinuously at a power frequency voltage up to 10 percent higherthan the rated voltage.

1.3 The cables covered in this standard are suitable for usewhere the combination of ambient temperature and temperature risedue to load results in conductor temperature not exceeding thefollowing:

Type of InsulationNormal ShortContinuous CircuitOperation Condition

General purpose 70�C160�C

Heat resisting 85�C160�C

The selection of type of insulation rests with the purchaser.

1.4 Armoured cables specified in this standard are suitable foruse in mines also. However, for such cables, additionalrequirements have been included wherever necessary.

2 References

IS 2 :1960Rules for rounding off numerical values

IS 1885 : Part 32 :1971 Electrotechnical vocabulary: Part 32 Cables, conductors andaccessoriesfor electricity supply

IS 3961 : Part 2 :1967 Recommended current ratingsfor cables:Part 2 PVC-insulated and NC-sheathed heavyduty cables

IS 3975 :1979Specification for PVC insulation and sheath ofelectric cables

IS 4905 :1968Methods for random sampling

IS 5831 :1984Specification for mild steel wires, strips andtapes for armouring of cables

IS 8130 :1984Specification for conductors for insulatedelectric cables and flexible cords

IS 10418 :1972Specification for drums for electric cables

IS 10810 : Part 42 :1984 Methods of tests for cables:Part 42 Resistivity test for armour wires andstrips and conductance test of armourwires/strips