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Preliminary engineering tools for cable sizing, voltage drop, ampacity, short-circuit screening, conduit fill and unit conversion. Use these calculators to check design assumptions before final cable specification.
Use these calculators as engineering screening tools. Detailed design may require exact installation conditions, grouping studies, manufacturer data, standard tables and protective-device coordination.
Select a preliminary conductor size from current, voltage drop and installation assumptions.
C-01 C-02 C-03Screen short-circuit thermal withstand using the adiabatic k-factor approach.
C-04Check conduit fill and estimate geometric conductor mass for logistics and installation planning.
C-05 C-06These tools provide preliminary engineering screening only. Final cable selection should be verified against the project jurisdiction, applicable standard, exact cable construction, installation arrangement, ambient conditions, grouping, protection coordination and manufacturer data.
Calculate a preliminary minimum conductor size from design current, voltage drop and reference installation conditions.
Preliminary voltage-drop calculation using reference mV/A/m values. For final design, use manufacturer R/X data or an applicable detailed calculation.
Use a clearly labelled reference dataset to screen current-carrying capacity under simplified installation and grouping conditions.
Preliminary thermal withstand screening using the simplified adiabatic relationship I = k·S/√t.
NEC-oriented conduit-fill screening based on conductor count and a user-supplied internal conduit diameter.
Estimate geometric conductor mass from nominal cross-section, conductor count, length and material density.
Fast deterministic conversions for common cable and electrical calculations. These conversions do not by themselves determine cable compliance or selection.
Convert common American Wire Gauge sizes to approximate metric conductor area.
Estimate operating current from power, voltage, system type, power factor and efficiency.
Mechanical horsepower conversion for motor and equipment calculations.
1 mechanical HP = 0.745699872 kW.
Temperature conversion for ambient, conductor and cable operating conditions.
Use the calculators for screening, then move to the detailed engineering guides for installation conditions, material selection, voltage drop and standards.
Understand current-carrying capacity, voltage drop, derating factors, installation methods and cable tray considerations before making a final conductor selection.
Open Cable Sizing Guide →Separate insulation material from sheath classification and understand how temperature rating, fire performance and installation environment affect cable specification.
Open Materials Guide →Check mechanical installation requirements for power cables, flexible cables, drag-chain applications and large single-core cables.
Open Bending Radius Guide →A cable should not be selected from ampacity alone. Use the following sequence to structure a preliminary engineering check.
Standards are shown to make the boundary of each calculator explicit. Always use the edition and requirements adopted by the project jurisdiction.
Use exact manufacturer R/X and ampacity data where available. Model grouping, soil, burial, thermal insulation and cable geometry where required. Check protective-device coordination and fault-current withstand separately. Confirm final cable construction, certification and installation standard.
Move from preliminary calculations to application-specific cable engineering guidance.
Review voltage-drop, ampacity and system-voltage considerations for 600 V and 1500 V DC solar applications.
Read Guide →Explore 1000 V / 1500 V DC battery-system cable selection, certification and application considerations.
Read Guide →Learn how to read cable construction markings such as XLPE, LSZH, SWA, AWA, voltage rating and product standards.
Read Guide →Send SORIVO your project conditions and our engineering team can review cable size, ampacity, voltage drop, installation conditions and application requirements.