Cable tests that are not equivalent, and why
IEC 60332-1-2 ≠ IS 10810-53
Not equivalent, because A different burner (a Bunsen flame, not the 1 kW premixed one), a flame time set by the cable's mass instead of its diameter, and no lower char limit: an IS 10810-53 pass does not show an IEC 60332-1-2 pass.
IEC 60332-1-2
- One 1 kW flame on a single vertical cable, applied once for a time set by the cable diameter. Sources: IEC 60332-1-2:2004+AMD1:2015 (edition 1.1), Table 1 p. 7 (flame time by diameter), Annex A p. 11 (recommended pass) (read in the standard)
- Pass: the char ends at least 50 mm below the top clamp and no lower than 540 mm below it. Sources: IEC 60332-1-2:2004+AMD1:2015 (edition 1.1), Table 1 p. 7 (flame time by diameter), Annex A p. 11 (recommended pass) (read in the standard)
IS 10810-53
- A Bunsen burner flame of about 125 mm at 45° on one vertical cable, for T = 60 + m/25 s, m being the mass in grams of a 600 mm length; two burners above 50 mm diameter. Sources: IS 10810 (Part 53):1984, cl. 4.2.1, 8.2, 8.4, pp. 1-2 (read in the standard)
- The method sets no pass limit; the product standard does, for example IS 17048: burning stops within 60 s and at least 50 mm below the top clamp stays unaffected. There is no lower char limit. Sources: IS 17048:2018, cl. 5.3, p. 4 (flammability), cl. 5.6, p. 4 (smoke), Annex A item 9, p. 19 (halogen) (read in the standard)
Values as the sources print them, every one with its source and how it was seen; where a value is not held, it says so. The cable's own standard and the specification decide which test applies.
Questions and answers
Is IS 10810-53 equivalent to IEC 60332-1-2?
No. A different burner (a Bunsen flame, not the 1 kW premixed one), a flame time set by the cable's mass instead of its diameter, and no lower char limit: an IS 10810-53 pass does not show an IEC 60332-1-2 pass.