Карманный электрик: ПУЭ, схемы

Calculations, diagrams, and electrical safety exam preparation in a single app. Each answer is accompanied by a "why" explanation and the relevant rule.

WHICH CABLE AND BREAKER
Enter the power or current—the app will select the cross-section according to PUE tables 1.3.4–1.3.7, adjusting for temperature and bundled installation, the circuit breaker rating, and check the voltage drop on a long line. The entire calculation process is visible: table, coefficient, and PUE rule. No "black boxes."

7 MORE CALCULATORS
• Power and current for 1 and 3 phases
• Will the circuit breaker trip during a short circuit: phase-neutral loop and maximum line length
• Voltage loss to a sauna, garage, or pump
• RCD selection: setting, AC or A type, leakage, selectivity
• Apartment or house input load
• Ohm's law
• Cross-section by core diameter - check if the cable is "thinner"

12 STEP-BY-STEP CONNECTION DIAGRAMS
Grounded socket, single- and double-key switch, pass-through and cross-over switches, motion sensor, second socket, RCD per group, residual-current circuit breaker, underfloor heating, cooktop, voltage relay. Accurate isometric diagrams, core colors according to GOST standards, wires are laid step by step. Each diagram includes common mistakes and the necessary tools. The first step is always the same: de-energize and check for the absence of voltage.

PANEL DESIGNER
Add lines—lights, sockets, kitchen, washing machine, underfloor heating. The app will select circuit breakers, assign lines to type A RCDs where needed, count modules and enclosures, draw a panel, and generate a materials estimate. PDF for electricians—in one click.

ELECTRICAL SAFETY EXAM
Groups II–V, up to and above 1000 V. Questions and answer options are verbatim from the Rostekhnadzor list, revised as of September 1, 2026. Rostekhnadzor does not publish answers, so the correct answers are provided in the text of the standards, and the basis for each is indicated: POTEE, PTEEP, PUE, first aid procedure. Training with spaced repetition, timed tests, error correction, topic forecast.

REFERENCE
Wire colors, cable markings, IP ratings and bathroom zones, room classes, grounding systems, circuit breakers and RCDs, electrical safety groups, beginner mistakes, and measuring tools.

FREE AND HONEST
Cable and circuit breaker calculations, power, Ohm's law, cross-section by diameter, four diagrams, one panel, all exam questions with answers and explanations, 25 practice answers per day, and five reference articles are available free of charge. Ads are rare and not included in questions.
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SAFETY
Work on the input, in the main panel, and on the riser is only performed by certified electricians. The app helps you understand the correct procedure, but does not replace a project, a permit, or a knowledge assessment.

This app is not an official resource of Rostekhnadzor and is not affiliated with any government agency.
Sources: List of questions — gosnadzor.ru (Rostekhnadzor), POTEE — publication.pravo.gov.ru/Document/View/0001202012300142, PTEEP — publication.pravo.gov.ru/Document/View/0001202210070065, Personnel Management Rules — publication.pravo.gov.ru/Document/View/0001202101180005, First Aid Procedure — publication.pravo.gov.ru/document/0001202405310015.
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