ALLEN
&
HEATH
iDR training
JAN08
Page - 20 - of 49
4.4. PL-Calculator
The maximum number of PL devices on any Root or branch depends on the combined current
requirement of the PL devices and the voltage drop over the cable run.
The number and type of PL devices on each cable run are entered into the calculator and a result is
obtained.
Enter number
and type of PL
devices
Enter cable
length
This example
gives a negative
result