Gnist – Electrical Calculator

Gnist is a fast, precise calculation tool for electricians and electrical professionals - built around NEK 400 (and IEC 60364).

Size cables and overcurrent protection, calculate voltage drop, short circuit and earth-fault disconnection, check selectivity, and size heating cable, EV charger, solar/PV and motor starting - all in seconds.

CALCULATORS

- Cable & fuse - cross-section, protection, reference method, correction factors

- Voltage drop - DeltaU in percent over the cable length

- Short circuit - Ik and adiabatic check

- Earth fault & disconnection - Zs requirement for automatic disconnection

- Selectivity - indicative assessment between protective devices

- Heating cable - power and spacing by room and substrate

- EV charger, solar/PV, motor starting

- Basic calculator - Ohm's law, power, energy, PE, AWG

- Build installations as a tree, get warnings and single-/multi-line diagrams

- Save projects and export PDF

LANGUAGES

The app is available in Norwegian, English, Swedish and Danish. You can choose the electrical standard (NEK 400, IEC 60364, SS 436, DS/HD 60364, DIN VDE 0100, SFS 6000, BS 7671) independently of the app language.

PRIVACY

Everything runs locally on the device - no account, no server, no tracking.

IMPORTANT

Gnist is a guidance tool and does not replace independent design. All results must be checked against the current NEK 400 and manufacturer data.

Terms of Use (standard Apple EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/