IS 4820 : 1968 Vulcanized fibre sheets for electrical purposes - Specificaion

1 Scope

1.1 This standard covers vulcanized fibre sheets of 1.5 to 25 mmthickness.

2 References

IS 2 :1960 Rules for rounding offnumerical values

IS 397 : 1952 Method for statistical qualitycontrol during productionby the use of control chart

IS 2584 : 1963 Methodof test for electric strength of solid insulatingmaterials at power frequencies

IS 2967 : 1964Specification for external micrometers