1 Scope
This part of IEC 60332 specifies the procedure for testing the resistance to vertical flame propagation
for a single small vertical electrical insulated conductor or cable, or optical cable,
under fire conditions. The apparatus is given in IEC 60332‑2‑1.
This standard gives the procedure for testing small optical fibre cables or a small
insulated conductor or cable when the method specified in IEC 60332‑1‑2 is not suitable because some small optical fibre cables may break or small conductors
may melt during the application of the flame. The recommended range of application
is for the testing of small single insulated conductors or cables of less than 0,5 mm²
cross-section.
NOTE 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.)
Recommended requirements for performance are given in Annex A.