A sensor resets at the far end
Check voltage drop, terminal voltage, SMPS margin, and field measurements.
VoltCheck24 Global Hub
DC Wire Size and Voltage Drop Calculators
DC wire size, cable sizing, voltage drop, AWG to mm2 conversion, 12V wiring, 24V control wiring, and solar DC cable calculators.
Recommended workflow
- Choose the actual use case: control panel, battery, solar, vehicle, or field device
- Enter current, one-way distance, voltage, and allowable drop
- Check recommended size against ampacity, protection, terminals, and local code
Start from the field problem
Choose the symptom or design decision first. Each path leads to the calculation, assumptions, and next verification step.
The 24V power supply runs hot
Sum loads, apply diversity and temperature derating, then compare alternatives.
A motor trips during startup
Separate full-load current from inrush current and review protection coordination.
A 4-20mA signal is unstable
Check loop voltage margin, wiring, grounding, input-card range, and measured values.
The control cabinet temperature rises
Estimate heat load, ambient conditions, fan or AC capacity, and derating needs.
How to choose the right DC calculator
Use the hub as a decision map. If the search starts with a generic wire-size question, begin with the DC wire size calculator. If the main concern is terminal voltage, use the DC voltage drop calculator. If the job is a vehicle, RV, marine, LED, solar, or industrial 24V control circuit, open the dedicated page because the practical checks after the calculation are different.
Use case->Voltage and current->Wire size result->Code and manufacturer check
DC Wire Size Calculator
Use this DC wire size calculator to estimate voltage drop and compare AWG or mm2 conductor sizes from load current, one-way cable length, and system voltage.
Wire Size Calculator DC
Estimate DC wire gauge from load current, one-way cable length, system voltage, and voltage-drop target. Compare AWG and mm2 sizes for field wiring.
DC Cable Size Calculator for Battery, Solar, and Control Wiring
Estimate DC cable size for battery, solar, control panel, and low-voltage equipment wiring using current, distance, and voltage-drop limits.
Voltage Drop Calculator DC - 12V, 24V, 48V Wiring
Calculate DC voltage drop percentage, load terminal voltage, and wiring margin for 12V, 24V, 48V, battery, solar, and control circuits.
24V Cable Calculator for PLC Sensors, Solenoids, and Control Panels
Check 24V DC cable voltage drop and recommended wire gauge for PLC sensors, solenoid valves, relays, IO-Link hubs, and control panels.
12V Wire Size Calculator for Battery, RV, Marine, and LED Wiring
Estimate 12V DC wire size for battery loads, RV accessories, marine devices, LED strips, and low-voltage equipment.
Solar DC Cable Size Calculator for PV, Battery, and Inverter Runs
Estimate solar DC cable size and voltage drop for PV strings, battery connections, charge controllers, and low-voltage inverter wiring.
AWG to mm2 Calculator and Wire Size Conversion Table
Convert common AWG wire gauges to approximate mm2 cross-sectional area and compare resistance, ampacity, and practical use cases.
Free preliminary engineering reference for technicians, panel builders, automation engineers, and designers worldwide.