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/