-
Home
-
Products
-
Demonstration
-
Prices
-
Support
-
Contact
CableCalc F.A.Q.
I am using CableCalc to calculate a fairly long circuit but whatever
I do the circuit 'fails'. It makes no difference whatever size of
circuit protective conductor (cpc) I add to the circuit
Check that the source impedance ze for the installation is correct.
The quoted electricity supply authorities typical maximum impedance
values (0.35 ohms or 0.15 ohms for 300 Ampere supply) are unlikely
to be correct. If you can go to site and measure the Ze then your
calculations will be much more accurate.
How many cpc's can I include in a calculation when sizing a cable?
If the cable has a sheath or armouring then that may be used for
the calculation together with options for using an internal core
and/or a separate earthwire (either automatically sized or selected).
What happens if the maximum size of cable is exceeded when I am
trying to calculate a cable size?
The load will be divided by two and two cables calculated in parallel.
If this still fails then the load will be divided by three and three
cables selected and so on up to a maximum of twenty cables.
I have designed a project with twelve distribution boards feeding
more than 300 circuits and now the architects have repositioned
the main transformer. This has completely changed all of the main
incoming figures, voltage, Ze, etc.
Simply input the revised source details and then click on the 'Calculate
all' button. The whole system will be recalculated using the updated
supply figures, and within a few minutes all of the circuits in
the project will have been recalculated.