Veridian
Electrical Equipment Supply · LLC
kVA sizing · voltage drop · conduit fill — free tools, run in your browser
Fast answers for the numbers you run on every job — transformer sizing, voltage drop, and conduit fill. Free, no sign-up, everything runs locally in your browser.
Load current to required kVA, with growth margin, mapped to the next standard three-phase or single-phase transformer size.
Open calculator →Copper or aluminum conductors, single- or three-phase, against the NEC-recommended 3% branch and 5% total voltage-drop guidelines.
Open calculator →Mixed THHN or XHHW fills in EMT, IMC, RMC, or PVC against NEC Chapter 9 limits — 53% for one conductor, 31% for two, 40% for three or more.
Open calculator →Enter any one value — get the other three, single- or three-phase, with power factor applied. Includes a transformer full-load-amp (FLA) reference.
Open calculator →Datasheet losses (NLL/LL watts) into annual dollars and lifetime cost — and compare two quotes on total cost of ownership, not sticker price.
Open calculator →Transformer kVA to full-load amps and a reference secondary feeder size at 75°C ampacity (NEC Table 310.16), with continuous-load margin and parallel-set guidance.
Open calculator →Planning aids only — verify results against the NEC edition adopted in your jurisdiction and your project drawings.
Every transformer quote starts with three questions: how big, how far, and what fits. These calculators answer the first-pass version of each — and when the result is a unit you need, we quote it.