Free · Made for Nepal · Works offline

The right cable, from the house meter to a 400 kV line.

Tell it what you are powering, where the cable runs and how far. You get the cable to ask for, the breaker and every part to buy — with the voltage your appliance will actually get, and every step of the calculation.

Size a house or motor cable Plan an 11–400 kV line How cable sizing works
  • IS + IEC methods, the ones used in Nepal
  • 156 published line ratings reproduced
  • No sign-up, nothing leaves your device

One tool for every cable job in Nepal

It asks only what you can read off a nameplate, a bill or a tape measure, and explains every term.

Houses, shops, motors

Main cable from the NEA meter, geysers, ACs, borewell pumps, EV chargers — copper or aluminium, IS or IEC.

11 and 33 kV cables

XLPE cables to transformers, sized for load, NEA fault level and voltage drop, with RMU, fuses and arresters.

Lines from 11 to 400 kV

ACSR and AAAC, single or bundled, rated for your site's heat, wind and altitude, with loadability for transmission.

What to buy

Breaker, RCD, isolator, surge protector, starter, lugs, glands, conduit, earthing — each with its rating and reason.

How it works

  1. Pick the jobHouse main, pump, AC, EV, shop, HV cable or overhead line.
  2. Describe the runHow it is laid, where in Nepal, how long. Pictures help you choose.
  3. Get the answerCable, breaker, voltage at the load, and the check that decided the size.
  4. Buy and installTake the list to the shop; check the cable markings; test before switching on.

Calculator

1 What the cable will power

2 Where the cable runs

3 The cable

4 Checks

How this answer was calculated

Worked examples from Nepal

Calculated live by the same engine. Open any one in the calculator and change it.

Honest by design

Standards you can check

IS 1554, IS 7098, IS 3961, IS 398, IEC 60364-5-52, IEEE 738, Nepal Electricity Regulation 2050 and NBC 207 — each step names its clause.

Checked against published data

45 automated tests with hand-worked examples; the overhead line engine reproduces 156 CEA and manufacturer ratings within 0.6 %. Typos found in source tables are listed and corrected.

Knows where it stops

It says when something is typical practice rather than a rule, when NEA data is needed, and when the work needs NEA approval or a licensed electrician.