Cable Capacitance Calculator

Use this calculator to estimate the capacitance from one wire to all other wires in your cable. This calculator takes into account your fixturing length, cable length, and the presence of shields and will return an estimate of the capacitance a test will see from one wire to all other wires in the cable under test.

Step 1) Estimate the Capacitance

Units of Measure

All lengths in

Your Fixturing

Estimated capacitance of fixture wiring is ___ pF/Foot (wire to wire capacitance).

Total length of fixturing connected to target wire Feet (usually 2x the fixturing length between the DUT and tester)

Estimated Capacitance of Fixturing:

___ pF

Your Device Under Test

Target wire is

Other wires in cable/bundle

Estimated capacitance is ___ pF/Foot (target wire to all other wires).

Total length of wire Feet

Estimated capacitance of this wire net:

___ nF

Estimate of Total Capacitance

__________

Estimated combined fixture and DUT capacitance:

__ nF

Step 2) Estimate Hipot Safety

Hipot Safety Information

DC Hipot Information

For testers that limit hipot energy and charge the highest DC voltage that might be intrinsically safe is ___ Volts.

AC Hipot Information

AC hipot frequency

Total AC Current
Test Voltage	mA AC RMS	mA Peak	Intrinsically Safe?
	__	__	__
	__	__	__
	__	__	__
	__	__	__

Cirris Systems - Technical Tips - Cable Capacitance Calculator