Electric Ref: Wire Size, Fill

Electrician calculator for wire size, conduit fill and voltage drop. Type the amps, get the wire size. Pick a conduit, see how many conductors fit. Electric Ref answers the questions electricians ask every day — in three taps, fully offline. SIZE WIRES CORRECTLY - Amps to conductor size with temperature correction, conductor bundling adjustment and termination limits applied automatically - Copper and aluminum, 60/75/90°C insulation - Small-conductor breaker caps built in - Every answer shows WHY — the code articles and factors behind it CONDUIT & BOX FILL - Max conductors for EMT, RMC, IMC, PVC 40/80, ENT, FMC, LFMC and more - THHN, XHHW, TW/THW wire types - Box fill with device, clamp and ground allowances MORE FIELD TOOLS - Voltage drop (DC and AC methods, any power factor, conduit material) - Motor full-load current, conductor and breaker sizing - Equipment grounding and grounding electrode conductor sizes - Transformer currents, Ohm's law wheel REFERENCE CHARTS - Hole saw and knockout sizes (triple-checked) - NEMA plug and receptacle configurations - Motor starter sizes, wire color codes - Burial depths, conduit support spacing, wire properties BUILT FOR THE FIELD - 100% offline — works in basements, new construction, anywhere - Big glove-friendly controls, screen stays awake - No account. Your data never leaves your phone. ELECTRIC REF PRO Without Pro, Electric Ref includes the Ohm's law wheel, daily wire sizing and core reference charts. Electric Ref Pro unlocks every calculator and chart, with unlimited wire sizing. Choose a monthly or yearly subscription, or one of three lifetime options. The lifetime options unlock the same Pro features; only the support amount differs. Prices are shown in the app before you buy. No ads. Subscriptions are charged to your Google Play account and renew automatically until cancelled. Manage or cancel any time in Google Play subscriptions. If you bought Pro before, it stays unlocked: use Restore. Values are based on the National Electrical Code®. Reference only — always verify with your locally adopted code edition and AHJ. NEC is a registered trademark of the National Fire Protection Association, which does not endorse this app.

New design: brighter colors, easier-to-read result cards and input fields.