Cable Conductor Size Calculator

To calculate ground wire size use the ground wire size calculator.

Cable conductor size calculator.

The primary two metals used for electrical conductors are copper and aluminum. For more information on ampacity calculations please consult our technical resources. The wire sizing calculator uses the resistance and reactance values from the pvc conduit column in chapter 9. The requirements of the national electrical code nec and local codes must always be followed.

One of these wires is a ground wire which can be sized down. Tables 4 to 21 are based on an ambient temperature of 40 c and a ground temperature of 25 c. Wire circular mils conductor. Southwire s voltage drop calculator is designed for applications using awg and kcmil sizes only.

The values in table 9 is based om three single conductors in a conduit. Insulation select the thermal rating of the insulation on the wire. Cable sizes are typically depicted as far as cross sectional territory american wire gauge awg or kcmil contingent upon the geographic district. It is based on cable type insulation type and the cable installation method.

Aluminum and flexible cables are not supported yet. Simply enter the conduit type and size then specify your conductors. Kindly give me guidance for the calculation of cable size. Suppose i have 40a load and 25ka is rating and i don t have specified lentgh of cable voltage ratings but i need to give just size of cable for phase conductor and ecc is there any way to calculate it directly using some direct formula.

A great tool to help electricians engineers and contractors answer the question what size conduit do i use per the nec the app will calculate the conduit fill percentages and jam probability for multiple conductors per nec guidelines. Conductor choose the material used as a conductor in the wire. The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 volts 60 c through 90 c 140 f through 194 f not more than three current carrying conductors in raceway cable or earth directly buried based on ambient air temperature of 30 c 86 f. Common conductors are copper and aluminum.

Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. The cable sizing calculator considers solid or stranded copper conductors only. Each has a different ampacity for a specified gauge size and these ampacities are found in nec table 310 15 b 16 for the calculations in this app. The cable sizing calculator uses the resistance r c and reactance x c values from table 9 in chapter 9 of the nec.

For example 3 0 awg copper. When sizing conductors calculations limits wire size to voltage drop and nec ampacity.