1 Scope
This part of IEC 60332 specifies the procedure for testing the resistance to vertical flame propagation
for a single vertical electrical insulated conductor or cable, or optical fibre cable,
under fire conditions. The apparatus is given in IEC 60332‑1‑1.
NOTE 1 Testing to IEC 60332‑1‑2 may be performed simultaneously with that to IEC 60332‑1‑3 if required.
Recommended requirements for performance are given in Annex A.
IEC 60332‑1‑2
specifies the use of a 1 kW pre-mixed flame and is for general use, except that the
procedure specified may not be suitable for the testing of small single insulated
conductors or cables of less than 0,5 mm2 total cross-section because the conductor melts before the test is completed, or
for the testing of small optical fibre cables because the cable is broken before the
test is completed. In these cases, the procedure given in IEC 60332‑2‑2 is recommended.
NOTE 2 Since the use of insulated conductor or cable which retards flame propagation and
complies with the recommended requirements of this standard is not sufficient by itself
to prevent propagation of fire under all conditions of installation, it is recommended
that wherever the risk of propagation is high, for example in long vertical runs of
bunches of cables, special installation precautions should also be taken. It cannot
be assumed that because the sample of cable complies with the performance requirements
recommended in this standard, that a bunch of cables will behave in a similar manner.
(See IEC 60332‑3 series.)