This tool calculates the DC resistance of a conductor (in ohms) based on its size, material, length, and temperature. It supports copper or aluminum wires with input in either mm² or AWG, and includes automatic temperature correction. Input Parameters Wire Size: Choose cross-sectional area in square millimeters (mm²) or American Wire Gauge (AWG); automatically converted to standard values Conductors in Parallel: Multiple identical conductors can be connected in parallel; total resistance is divided by the number of conductors Length: Enter actual cable length in meters (m), feet (ft), or yards (yd) Temperature: Affects resistivity; input in degrees Celsius (°C) or Fahrenheit (°F), auto-convertible Conductor Material: Copper (Cu) or Aluminum (Al), each with distinct resistivity and temperature coefficient Cable Type: Unipolar (single conductor) or Multicore (multiple conductors in one sheath), influencing structural assumptions Output Results DC Resistance (Ω) Resistance per unit length (Ω/km or Ω/mile) Temperature-corrected resistance value Reference Standards: IEC 60228, NEC Table 8 Ideal for electrical engineers, installers, and students to quickly assess voltage drop and power loss in wiring systems.

This tool calculates the maximum cable length that can be used without exceeding the allowable voltage drop and without degrading insulation, based on IEC and NEC standards. It supports DC, single-phase, two-phase, and three-phase systems, including parallel conductors and various temperature ratings. Input Parameters Current Type: Direct Current (DC), Single-phase AC, Two-phase, or Three-phase (3-wire/4-wire) Voltage (V): Enter phase-to-neutral voltage for single-phase, or phase-to-phase for polyphase Load Power (kW or VA): Rated power of the connected equipment Power Factor (cos φ): Ratio of active to apparent power, between 0 and 1 (default: 0.8) Wire Size (mm²): Cross-sectional area of the conductor Parallel Phase Conductors: Conductors with same size, length, and material can be used in parallel; total permissible current is sum of individual core ratings Voltage Drop (% or V): Maximum allowable voltage drop (e.g., 3% for lighting, 5% for motors) Conductor Material: Copper (Cu) or Aluminum (Al), affecting resistivity Cable Type: Unipolar: 1 conductor Bipolar: 2 conductors Tripolar: 3 conductors Quadrupolar: 4 conductors Pentapolar: 5 conductors Multipolar: 2 or more conductors Operating Temperature (°C): Based on insulation type: IEC/CEI: 70°C (PVC), 90°C (XLPE/EPR), 105°C (Mineral Insulation) NEC: 60°C (TW, UF), 75°C (RHW, THHN, etc.), 90°C (TBS, XHHW, etc.) Output Results Maximum allowable cable length (meters) Actual voltage drop (% and V) Conductor resistance (Ω/km) Total circuit resistance (Ω) Reference Standards: IEC 60364, NEC Article 215 Designed for electrical engineers and installers to plan wiring layouts and ensure acceptable voltage levels at the load end.

Free online cable power loss calculator. Instantly compute I²R losses, voltage drop, and efficiency for DC/AC systems — supports copper, aluminum, and parallel conductors. How much power is lost as heat in your wires? Enter voltage, load, length, and wire size to instantly calculate I²R losses, voltage drop, and circuit efficiency — compliant with IEC 60364 and NEC standards. Supported Systems & Parameters System Types Direct Current (DC) Single-phase AC Two-phase Three-phase (3-wire or 4-wire) Input Parameters Voltage: Phase-to-neutral (single-phase) or phase-to-phase (polyphase) Load Power: In kW or VA Power Factor: 0–1 (default: 0.8) Wire Size: Cross-sectional area (mm² or AWG) Material: Copper (Cu) or Aluminum (Al) Length: One-way distance (meters) Operating Temperature: Auto-adjusted based on insulation type (PVC, XLPE, etc.) Parallel Conductors: Supported for higher current capacity Output Results Conductor resistance (Ω/km) Total circuit resistance (Ω) Power loss (W or kW) Energy loss (kWh/year, optional) Voltage drop (% and V) Temperature-corrected resistance Compliant with IEC 60364 and NEC Article 310. Designed for electrical engineers, solar installers, and industrial designers.

This tool calculates the maximum admissible let-through energy (I²t) that a cable can withstand under short-circuit conditions, based on IEC 60364-4-43 and IEC 60364-5-54 standards. It ensures that protective devices (e.g., circuit breakers or fuses) interrupt fault currents before the conductor overheats and damages insulation. Input Parameters Conductor Type: Phase conductor, single-core protective conductor (PE), or multi-core cable's protective conductor (PE) Wire Size (mm²): Cross-sectional area of the conductor, affecting thermal capacity Conductor Material: Copper (Cu) or Aluminum (Al), influencing resistivity and heat generation Insulation Type: Thermoplastic (PVC) Thermosetting (XLPE or EPR) Mineral thermoplastic (PVC) covered Mineral bare sheath or bare conductor (not exposed to touch, restricted area) Mineral bare sheath or bare conductor (exposed to touch, normal conditions) Mineral bare sheath or bare conductor (fire risk environment) Mineral with metallic sheath used as protective conductor Output Results Admissible let-through energy (kA²s) — maximum tolerable I²t value Reference standard clauses: IEC 60364-4-43 and IEC 60364-5-54 Compliance check: whether the calculated I²t is less than the protection device’s I²t characteristic Designed for electrical designers and installers to verify short-circuit thermal stability of cables and ensure safe operation during faults.

This tool calculates the maximum continuous current-carrying capacity of insulated conductors with nominal voltage not exceeding 1 kV a.c. or 1.5 kV d.c., based on Tables B.52.2 to B.52.13 of IEC 60364-5-52. It ensures that conductor temperature does not exceed the insulation's thermal limit during normal operation. Input Parameters Method of Installation: According to IEC 60364-5-52 (Table A.52.3), such as open air, in conduit, buried, etc. Note: Not all methods are recognized in every country's regulations. Conductor Material: Copper (Cu) or Aluminum (Al), affecting resistivity and thermal performance Insulation Type: Thermoplastic (PVC): Conductor temperature limit 70°C Thermosetting (XLPE or EPR): Conductor temperature limit 90°C Wire Size (mm²): Cross-sectional area of the conductor Ambient Temperature: Temperature of surrounding medium when unloaded: Air temperature correction factor: IEC 60364-5-52 Table B.52.14 Ground temperature correction factor: IEC 60364-5-52 Table B.52.15 Soil thermal resistivity correction: IEC 60364-5-52 Table B.52.16 Number of Loaded Conductors: Actual number of current-carrying conductors: Direct current: 2 Single-phase: 2 Two-phase without neutral: 2 Two-phase with neutral: 3 Three-phase without neutral: 3 Three-phase with neutral (balanced load, no harmonics): 3 Three-phase with neutral (unbalanced load or with harmonics): 4 Total Harmonic Distortion (THD): Total 3n harmonic current content. If unknown, use total harmonic distortion value for estimation Phase Conductors in Parallel: Identical conductors can be connected in parallel; maximum permissible current is the sum of individual core ratings Circuits in the Same Conduit: Number of circuits inside one duct powering different loads (e.g., 2 lines for 2 motors). Reduction factors from IEC 60364-5-52 Table B.52.17 apply. Derating Factor for Parallel Cables (if present): Applies when multiple sets of cables are installed in a single duct. Each set includes: one conductor per phase + single neutral (if required) + single protective conductor. Output Results Maximum continuous current (A) Corrected value for ambient temperature Reduction factor for multiple circuits Harmonic derating factor Reference Standards: IEC 60364-5-52, Tables B.52.2–B.52.13 Designed for electrical engineers and designers to select appropriate insulated cables for low-voltage power distribution systems, ensuring safe and compliant operation.

This tool calculates the maximum continuous current-carrying capacity of mineral-insulated bare conductors rated at 750V, based on Tables B.52.6 to B.52.9 of IEC 60364-5-52. It supports copper or aluminum conductors under various installation conditions and environmental corrections. Input Parameters Method of Installation: According to IEC 60364-5-52 (Table A.52.3), such as open air, buried, in conduit, etc. Note: Not all methods are recognized in every country's regulations. Conductor Material: Copper (Cu) or Aluminum (Al), affecting resistivity and thermal performance Type: PVC-covered or bare exposed to touch (metallic sheath temperature: 70°C) Bare not exposed to touch and not in contact with combustible material (metallic sheath temperature: 105°C) Wire Size (mm²): Cross-sectional area of the conductor Phase Conductors in Parallel: Identical conductors can be connected in parallel; maximum permissible current is the sum of individual core ratings Ambient Temperature: Temperature of surrounding medium when unloaded: Air temperature correction factor: IEC 60364-5-52 Table B.52.14 Ground temperature correction factor: IEC 60364-5-52 Table B.52.15 Soil thermal resistivity correction: IEC 60364-5-52 Table B.52.16 Circuits in the Same Conduit: Number of circuits inside one duct powering different loads (e.g., 2 lines for 2 motors). Reduction factors from IEC 60364-5-52 Table B.52.17 apply. Output Results Maximum continuous current (A) Corrected value for ambient temperature Reduction factor for multiple circuits Reference Standards: IEC 60364-5-52, Tables B.52.6–B.52.9 Designed for electrical engineers and designers to select appropriate bare conductors for high-voltage or industrial power distribution systems, ensuring safe and reliable operation.

This tool calculates the steady-state temperature of a cable conductor under load current, based on IEC 60364-5-52 standards. It evaluates whether the operating temperature exceeds the insulation material's thermal limit to prevent overheating and damage. Input Parameters Current Type: DC, single-phase AC, two-phase, or three-phase (3-wire or 4-wire system) Voltage (V): Enter phase-to-neutral voltage for single-phase, or phase-to-phase for polyphase systems Load Power (kW or VA): Rated power of the connected equipment, used to calculate operating current Power Factor (cos φ): Ratio of active to apparent power, between 0 and 1 (default: 0.8) Method of Installation: According to IEC 60364-5-52 Table A.52.3 (e.g., exposed, in conduit, buried) Conductor Material: Copper (Cu) or Aluminum (Al), affecting resistivity and heat generation Insulation Type: PVC (70°C), XLPE/EPR (90°C), determines maximum allowable temperature Wire Size (mm²): Cross-sectional area of the conductor, directly affects current-carrying capacity Ambient Temperature (°C): Temperature of surrounding medium when unloaded, impacts heat dissipation Circuits in Same Conduit: Number of circuits in one duct; used for derating factor (Table B.52.17) Output Results Steady-state conductor temperature (°C) Whether temperature exceeds insulation limits (PVC: 70°C, XLPE/EPR: 90°C) Correction factors applied (ambient air/ground temp, soil thermal resistivity) Reference standard tables: IEC 60364-5-52 Tables B.52.14, B.52.15, B.52.16 Designed for electrical engineers and installers to assess cable thermal performance and ensure safe long-term operation.

Find the right wire size for solar inverters, home circuits & more. Supports DC/AC, voltage drop, IEC 60364. Free tool for engineers & DIYers. What size wire for a 2000W inverter? Can I use 10 AWG for my solar panels? Get the correct cable size based on load, voltage, distance, and allowable voltage drop — compliant with IEC 60364-5-52. How It Works This tool calculates the minimum conductor cross-sectional area (mm²) according to IEC 60364-5-52, considering: System type: DC, single-phase or three-phase AC Voltage, load power, and power factor Cable length and max allowed voltage drop (typically 3%) Ambient temperature, insulation type (PVC/XLPE), and installation method Grouping derating and parallel conductors Designed for electrical engineers, solar installers, and students who need fast, code-compliant cable sizing. Common Questions What size wire for a 2000W inverter? For a 12V system over 10ft with 3% voltage drop, you need at least 2/0 AWG (70 mm²) copper cable. Can I use 10 AWG for my solar panels? Yes — if your array current is under 30A and the distance is less than 50ft (15m) at 48V. How to calculate DC cable size with voltage drop? Enter your DC voltage, load power, one-way distance, and max % drop. The tool applies IEC derating and returns the minimum mm².

Calculate the maximum continuous current-carrying capacity of busbars based on material, size, environment, and installation conditions. Supports: Copper / Aluminum materials Rectangular / Round busbars Ambient temperature and temperature rise Ventilation (open air, enclosed, forced) Installation position (horizontal, vertical, stacked) Surface finish (unpainted, dark painted) Parallel busbars Key Formula I = K × √(A × ΔT) × f₁ × f₂ × f₃ Where: K: Material factor (Cu≈1.0, Al≈0.6) A: Cross-sectional area (mm²) ΔT: Allowable temperature rise (°C) f₁: Ventilation factor f₂: Position factor f₃: Surface factor Example Copper rectangular busbar, 100×10mm, ambient 35°C, ΔT=30°C, open air, horizontal, unpainted → Current capacity ≈ 2800 A