7 calculators in this category
- Wire Size & Ampacity CalculatorNEC 2023 (NFPA 70), Table 310.16 with 110.14(C), 240.4 and 310.15Enter the load, the conductor material and the conditions the conductor will live in, and this calculator returns the smallest…
- Voltage Drop CalculatorNEC 2023 (NFPA 70) informational notes to 210.19 and 215.2Enter the load current, the one-way length of the run, the system voltage and the conductor you plan to use, and this…
- Conductor Ampacity Derating CalculatorNEC 2023 (NFPA 70) Article 310 and 110.14(C)Start with the table ampacity of your conductor, then apply the two derating factors the NEC requires: an ambient temperature…
- Conduit Fill CalculatorNEC 2023 (NFPA 70), Chapter 9 Tables 1, 4 and 5Enter the conduit you plan to use and the conductors you plan to pull, and this calculator returns the total conductor area…
- Box Fill Calculator (NEC 314.16)NEC 2023 (NFPA 70) 314.16Enter what is going into the box — conductor sizes and counts, devices on yokes, internal clamps, support fittings and…
- Equipment Grounding Conductor Size CalculatorNEC 2023 (NFPA 70) 250.122Give this calculator the rating of the overcurrent device protecting the circuit and it returns the minimum equipment grounding…
- AWG to mm² Wire Size Conversion CalculatorASTM B258 AWG definitionPick an AWG size and this calculator gives its exact diameter in millimetres and inches, its cross-sectional area in mm², its…
Which one do you need?
- Wire Size & Ampacity Calculator
- Find the minimum copper or aluminium wire size for any load using NEC Table 310.16, with continuous-load, ambient and conductor-bundling corrections applied.
- Voltage Drop Calculator
- Calculate voltage drop and percent drop on any run, then see the smallest copper or aluminium conductor that keeps you inside the NEC 3% guideline.
- Conductor Ampacity Derating Calculator
- Apply NEC ambient temperature correction and conductor bundling adjustment to a conductor's table ampacity, then check it against the termination limit and load.
- Conduit Fill Calculator
- Work out conduit fill to NEC Chapter 9. Enter conductor sizes and counts for total area, percent fill, the 53/31/40 limit and the smallest raceway to use.
- Box Fill Calculator (NEC 314.16)
- Total the cubic-inch box fill for conductors, devices, clamps and grounds under NEC 314.16 and compare it against the marked volume of your outlet box.
- Equipment Grounding Conductor Size Calculator
- Size the equipment grounding conductor from the overcurrent device rating using NEC Table 250.122, including the proportional increase when phase conductors grow.
- AWG to mm² Wire Size Conversion Calculator
- Convert American Wire Gauge to diameter, area in mm2, circular mils and kcmil, and convert a metric area back to its AWG equivalent, with DC resistance.
More electrical trade & electronics categories
Related categories in other subjects
Where this work overlaps other trades and disciplines.