In
many cases, the individual terminals can carry several times the
derated current indicated the derating curve when less than %
of the total complement used..
For these cases, general rules cannot established and the limits
must determined for each individual case.
NOTE: practice, usually the case that all terminals are not
loaded simultaneously with the maximum permissible current. 4.
..Corrected current-carrying capacity curve (derating curve)
A corrected current-carrying capacity curve (derating curve), derived from
the [. recommended that
the method described this standard used accordingly these
cases.] basic curve (see figure 4.g.197), shall specified the relevant
detail specification. these factors result current-
carrying capacity other than that which may expected due thermal
limitations, then revised value shall apply.198: Example current-carrying capacity graph
The derating factor justified because the current-carrying capacity may
be limited further external factors, e. This curve takes into account variations specimens as
well errors temperature measurements the measuring equipment.
158 ____________________________________________________________
0 fu3 <u2 tu\
Ambient temperature
Fig. the size the wire and unequal
distribution the loaded circuits
