Current Divider Calculator: Calculate Branch Current in Parallel Circuits
Use a Current Divider Calculator to find branch current in parallel circuits. Learn the formula, derivation, examples, impedance and common mistakes.
13 min readRead article →
Practical electrical guides
Voltage drop and cable sizing guides
Expert-led guides on voltage drop, cable sizing and the calculations behind safe, efficient electrical circuits.
Latest articles
75 articlesFrom the knowledge base
Voltage Divider Calculator: Calculate Output Voltage & Resistor Values
Use a Voltage Divider Calculator to find Vout, choose resistor values, calculate 2–5 resistor dividers and understand E24 values and loading effects.
9 min readRead article →
Equivalent Resistance Calculator for Series, Parallel & Mixed Circuits
Use an Equivalent Resistance Calculator to find total resistance in series, parallel and mixed circuits with formulas, steps, examples and checks.
6 min readRead article →
Parallel Resistance Calculator: Calculate Total Resistance
Use a Parallel Resistance Calculator to find total resistance for two or more resistors. Learn the formula, examples, shortcuts and common mistakes.
10 min readRead article →
Series Resistance Calculator: Calculate Total Resistance
Use a Series Resistance Calculator to find total resistance by adding resistor values in a series circuit. Learn the formula, steps and practical examples.
9 min readRead article →
Electrical Power Calculator: Calculate Watts, kW, Amps & Voltage
Use an electrical power calculator to find watts, kW, voltage and current for DC, single phase and three phase systems using power factor and formulas.
11 min readRead article →
Resistance Calculator: Calculate Resistance Using Voltage, Current and Power
Use a Resistance Calculator to find resistance from voltage, current or power. Learn resistance formulas, examples, series and parallel calculations.
12 min readRead article →
Ohm's Law Calculator: Calculate Voltage, Current, Resistance and Power
Use an Ohm's Law Calculator to find voltage, current, resistance and power. Learn Ohm's Law formulas with examples for accurate electrical calculations.
10 min readRead article →
Flexible Cable Explained: Types, Uses, Benefits and Applications
Learn what flexible cable is, how it is constructed, different types, applications, benefits and how to choose the right cable for electrical systems.
10 min readRead article →
NYY Cable Explained: Construction, Types, Uses and NYY-J Difference
Learn what NYY cable is, what NYY stands for, how it is constructed, its types, applications and the difference between NYY-J and NYY-O cables.
8 min readRead article →
Battery Cable Explained: Types, Sizes, Uses and Applications
Learn what battery cable is, how it works, different types, sizes, applications and how to choose the right cable for automotive and electrical systems.
8 min readRead article →
Braided Wire Explained: Types, Construction, Uses and Benefits
Learn what braided wire is, how it is made, different braid types, benefits, applications, and how braided wire differs from stranded wires.
8 min readRead article →
ACSR Conductor Explained: Construction, Types, Uses and Benefits
Learn what an ACSR conductor is, how aluminum and steel strands work together, its types, advantages, disadvantages and common power applications.
8 min readRead article →
PVC Insulated Cable: Types, Uses and Applications
Learn what PVC insulated cable is, how PVC insulation works, common cable types, applications, benefits and differences from other insulation materials.
8 min readRead article →
Cable Tray Guide: Types, Uses, Sizes and Installation
Learn what a cable tray is, explore cable tray types, sizes, materials, uses and installation basics for electrical cable management systems and projects.
8 min readRead article →
Single Core Cable vs Multi Core Cable: Key Differences
Learn the key differences between single core cable and multi core cable, including 2.5 mm² cable uses, current capacity, AC wiring and selection tips.
11 min readRead article →
Underground Electrical Cable: Types, Sizing & Installation
Learn about underground cable types, sizes, voltage drop, installation, burial depth, specifications, and how to choose the right cable for your project.
10 min readRead article →
Fire Alarm Cable: Types, Sizes, Standards & Selection Guide
Learn about fire alarm cable types, sizes, UK standards, voltage drop and practical tips for choosing the right cable for reliable fire alarm installations.
14 min readRead article →
MICC Cable Guide: Meaning, Construction, Uses & Benefits Explained
Learn what MICC cable means, how mineral insulated copper cable works, its construction, uses, fire resistance and factors to consider before choosing.
9 min readRead article →
TPS Cable Guide: Types, Sizes, Uses And Current Ratings Explained
Learn what TPS cable means, including types, sizes, uses, current ratings and how to choose the right TPS electrical cable for your installation.
9 min readRead article →
3 Phase Cable Guide: Types, Sizes, Uses & How To Choose The Right Cable
Learn about 3 phase cable types, sizes, uses and selection factors including load, voltage drop, installation methods and cable requirements.
11 min readRead article →
Flat Cable vs Round Cable: Differences, Uses & Which Is Better?
Compare flat cable vs round cable, including size, flexibility, durability, Ethernet use and applications to choose the right cable for your needs.
7 min readRead article →
Twin and Earth Cable Explained: Sizes, Current Ratings, Dimensions & Uses
Learn what twin and earth cable is, including sizes, current ratings, CPC sizes, specifications and common uses for UK electrical installations.
8 min readRead article →
Tri Rated Cable Explained: Ratings, Sizes, Uses And Current Capacity
Learn what tri rated cable is, including ratings, sizes, current capacity, standards, uses and how to choose the right cable for electrical applications.
11 min readRead article →
Electrical Cable Size Guide: How To Choose The Right Cable Size
Learn how to choose the correct electrical cable size using load current, voltage, cable length, installation method and voltage drop considerations.
9 min readRead article →
Earth Cable Size Calculator: Calculate Protective Earth Conductor Size
Use an Earth Cable Size Calculator to estimate protective conductor size using fault current, fault duration, material and installation requirements.
9 min readRead article →
kW To Cable Size Calculator: Calculate Cable Size From Power
Use our kW to cable size calculator to estimate cable requirements from power loads using voltage, phase type, cable length and installation conditions.
9 min readRead article →
HV Cable Size Calculator: Calculate High Voltage Cable Requirements
Use a HV cable size calculator to estimate high voltage cable sizing requirements based on current, voltage drop, cable length and installation conditions.
10 min readRead article →
SWA Cable Calculator: Calculate Armoured Cable Size and Voltage Drop
Use a SWA cable calculator to estimate armoured cable size, current capacity and voltage drop based on load, cable length and installation requirements.
7 min readRead article →
Cable Drum Handling Guide: Equipment, Safety and Best Practices
Learn cable drum handling methods, equipment, storage practices, safety procedures and cable protection tips for safe electrical installation and project planning.
7 min readRead article →
Trailing Cable Explained: Uses, Types, Hazards and Specifications
Learn what a trailing cable is, where it is used, common hazards, specifications and how to select the right flexible cable for electrical applications.
6 min readRead article →
RVMV-K Cable Explained: Construction, Uses and Specifications
Learn what RVMV-K cable is, how its armoured construction works, where it is used and how cable sizing factors help select the right electrical cable.
6 min readRead article →
YMvK mb Cable Explained: Meaning, Construction and Applications
Learn what YMvK mb cable is, how CU XLPE PVC construction works, where it is used and how proper cable selection improves electrical installation performance.
8 min readRead article →
Understanding the Causes of Voltage Drop in Electrical Systems
Learn the factors affecting voltage drop, including current, wire size, cable length, resistance, temperature and material that influence electrical performance.
7 min readRead article →
Cable Sizing Factors That Affect Conductor Selection
Understand cable sizing factors that affect conductor selection, including load, voltage drop, cable length, temperature, installation method and material.
6 min readRead article →
Choosing the Right Wire Size for Electrical Applications
Learn how to choose wire size for electrical applications using load, voltage, distance, voltage drop and installation factors for proper conductor selection.
7 min readRead article →
What Is AWG Wire Size? American Wire Gauge Explained
Learn what AWG wire size means, why smaller numbers indicate larger wires and how wire gauge affects resistance, ampacity and electrical performance.
7 min readRead article →
Acceptable Voltage Drop Limits: Understanding 3% and 5%
Learn acceptable voltage drop limits, including 3% and 5% guidelines and understand how voltage loss affects electrical circuits, equipment and performance.
8 min readRead article →
How Cable Length Affects Voltage Drop in Electrical Systems?
Learn how cable length voltage drop affects electrical systems and how distance, resistance and wire size influence voltage loss and performance.
7 min readRead article →
THHN Wire: Meaning, Uses, Ratings and THWN Differences
Learn what THHN wire means, where it is used, its ratings, common AWG sizes and how THHN differs from THWN and THWN 2 in US electrical wiring.
9 min readRead article →
Wire Derating Explained: How It Changes Ampacity
Learn wire derating, NEC adjustment factors, temperature correction and adjusted ampacity to understand how conductor conditions affect safe wire sizing.
9 min readRead article →
NEC Wire Size Requirements: Understanding Conductor Sizing
Understand NEC wire size requirements for US installations including ampacity, temperature ratings, load factors, conductor adjustments and voltage drop.
8 min readRead article →
Ampacity vs Voltage Drop: Understanding Wire Sizing
Ampacity vs voltage drop explained with formulas, differences and wire sizing guidance. Learn how both factors affect safe and efficient electrical wire sizing.
6 min readRead article →
Copper vs Aluminum Wire: Key Differences Explained
Copper vs aluminum wire comparison covering conductivity, cost, size, current capacity, voltage drop and which conductor works best for different applications.
7 min readRead article →
Copper Wire Resistance Chart: AWG Resistance Values Explained
Copper wire resistance chart with AWG sizes, ohms per foot and resistance values per 1000 feet. Learn how resistance affects voltage drop calculations.
7 min readRead article →
Fuse Size Calculator: Calculate the Right Fuse Rating
Use a fuse size calculator to estimate the right fuse rating for your load. Learn fuse sizing for DC, AC, 12V, motors, solar and US circuits.
14 min readRead article →
3 Phase Wire Size Calculator: How to Size 3 Phase Wire
Use a 3 phase wire size calculator to select AWG for 208V and 480V systems, check ampacity and voltage drop and avoid common sizing mistakes.
9 min readRead article →
How to Calculate Cable Pulling Tension?
Use a cable pulling tension calculator to estimate pull force check sidewall pressure and compare tension with manufacturer limits before installation.
8 min readRead article →
12V Wire Size Calculator: How to Choose the Right Wire
Use our 12v wire size calculator to choose the right AWG for 12V DC circuits based on current, cable length, material and allowable voltage drop.
14 min readRead article →
Ground Wire Size Calculator: How to Size a Grounding Conductor
Use a ground wire size calculator to size equipment grounding conductors by breaker rating, wire material, NEC Table 250.122 and conductor upsizing.
11 min readRead article →
Motor Wire Size Calculator: How to Size Motor Wiring
Use a Motor Wire Size Calculator to size motor conductors by horsepower, voltage, phase, FLC, ampacity and voltage drop for US electrical applications.
11 min readRead article →
Wire Gauge Calculator: How to Determine the Right AWG Size
Use our wire gauge calculator to determine AWG size, convert wire gauge to mm² and check current, length, voltage drop and DC circuit needs.
15 min readRead article →
Wire Size by Amperage: How to Choose the Right AWG
Find the right wire size by amperage with a practical AWG chart. Learn how to size wire for amps, check ampacity and avoid common sizing mistakes.
8 min readRead article →
Wire Size Chart: AWG, Amps, mm² & Wire Sizing Guide
Use this wire size chart to compare AWG, mm², diameter and ampacity then learn how load, distance and NEC rules affect conductor sizing.
14 min readRead article →
Wire Voltage Drop Calculator: How to Choose the Right Cable Size
Not sure what wire size to use? Our wire voltage drop calculator helps you choose the right cable size with sizing charts, formulas and real examples.
11 min readRead article →
Wire Size Calculator: How to Choose the Right Wire Gauge
Use a wire size calculator to find the right AWG or mm² conductor for your load then check ampacity, derating and voltage drop requirements.
11 min readRead article →
How to Use a Landscape Lighting Calculator for Outdoor Lighting
Use a landscape lighting calculator to estimate lighting load, voltage drop, wire size, transformer capacity and costs for low voltage outdoor lighting.
13 min readRead article →
Extension Cord Calculator: How to Choose the Right Cord Size
An extension cord calculator helps you evaluate the right cord for a portable load by considering the equipment's current, supply voltage, cord length, con
13 min readRead article →
Feeder Size Calculator: How to Calculate Feeder Conductor Size
Use a feeder size calculator to determine conductor ampacity, check voltage drop and size feeders for panels, motors, transformers and other loads.
12 min readRead article →
How to Calculate Voltage Drop: A Complete Step by Step Guide
Learn how to calculate voltage drop with simple formulas, step-by-step examples, single phase and three phase calculations and practical wire sizing tips.
12 min readRead article →
How to Use the Southwire Voltage Drop Calculator
Learn how the Southwire Voltage Drop Calculator works, including inputs, formulas, examples, limitations and a practical alternative for voltage drop checks.
10 min readRead article →
How to Calculate Voltage Drop Across a Resistor?
Calculate voltage drop across a resistor using Ohm's Law with formulas, worked examples, resistor sizing tips and a free voltage drop calculator.
11 min readRead article →
How to Calculate DC Voltage Drop for Solar and 12V Systems?
Use a DC voltage drop calculator to check solar, 12V and 24V systems. Learn the formula, work through examples and choose the right cable size.
11 min readRead article →
How to Use a Solar Wire Size Calculator for PV Cable Sizing
Use a solar wire size calculator to find the right PV cable based on current, voltage, distance, voltage drop, panel setup and installation conditions.
12 min readRead article →
Minimum Circuit Ampacity Calculator: How to Calculate MCA
Use a Minimum Circuit Ampacity Calculator to size HVAC conductors, understand the MCA formula, read nameplates and avoid common wire sizing mistakes.
12 min readRead article →
Financial Updates Aggr8Finance: News, Markets & Finance Guide
Explore financial updates Aggr8Finance including market news, investment insights, crypto trends and personal finance topics to make informed decisions.
7 min readRead article →
Voltage Drop Calculator Fire Alarm: NFPA 72 NAC Guide
Use our voltage drop calculator fire alarm guide to calculate NAC voltage drop, check 20.4V derating and verify EOL and point to point results.
7 min readRead article →
3 Phase Voltage Drop Calculator: Formula & Examples
Learn how a 3 phase voltage drop calculator works, understand the formula, see worked examples and choose the right cable size for reliable systems.
11 min readRead article →
NEC Voltage Drop Calculation
NEC voltage drop calculation explained with formulas, examples, Chapter 9 Table 8 data and practical guidance for accurate electrical wire sizing.
8 min readRead article →
12V Voltage Drop Calculator: Calculate Cable Loss & Wire Size
Use our 12V voltage drop calculator to estimate cable voltage loss, choose the correct wire size and improve the efficiency of your 12V DC system.
12 min readRead article →
AC Voltage Drop Calculator for Single and Three Phase Circuits
Use our AC Voltage Drop Calculator to estimate voltage loss for single and three phase circuits using current, cable length, wire size and power factor.
13 min readRead article →
Voltage Drop Formula and Calculation Table: Quick Reference Guide
Get the voltage drop formula and calculation table for single phase, three phase and DC circuits with worked examples and quick reference values.
7 min readRead article →
What Is Voltage Drop? How It Works in Electrical Circuits
What is voltage drop? Learn its formula, causes, calculation, effects, acceptable limits and practical ways to reduce voltage loss in circuits.
9 min readRead article →
How to Calculate Voltage Drop in Parallel Circuit?
Learn how to calculate voltage drop in parallel circuit with formulas, worked examples, feeder and branch calculations, plus practical tips.
7 min readRead article →
How to Calculate Voltage Drop in a Series Circuit?
Learn how to calculate voltage drop in a series circuit using the VD = I × R formula with worked examples and our free Voltage Drop Calculator.
11 min readRead article →