Electrical Wiring Diagrams and Symbols Library
A wiring diagram answers one practical question: which wire goes to which terminal. This library groups the electrical diagrams on ConceptViz by job, from a single outlet or three-way switch to a solar array, a generator transfer switch or a boat battery bank.
The reference group holds the charts you check while reading or drawing a diagram: circuit symbols, logic gate symbols, AWG wire gauge, the resistor color code, Ohm's law and P&ID symbols. The last group links the general diagram makers if your circuit does not match a ready-made case.
Wiring diagrams are for planning and learning. Local electrical codes and a qualified electrician decide what is safe to install in a real building or vessel.
28 pages in this collection. Jump to: Home wiring diagrams · Power, backup and equipment wiring · Symbols and electrical reference charts · Draw your own diagram
Home wiring diagrams
Outlets, switches, fans and thermostats.
Outlet Wiring Diagram GeneratorExact outlet wiring diagrams: end of run, middle of run with pigtails, switch-controlled and split receptacles, plus an AI generator.
Light Switch Wiring Diagram GeneratorExact single pole light switch wiring diagrams: power at the switch or at the light (switch loop), with a connection table and an AI generator.
3-Way Switch Wiring Diagram GeneratorExact 3-way switch wiring diagrams: power at the first switch or at the light, travelers, common terminals and the re-marked white, plus an AI generator.
4-Way Switch Wiring Diagram GeneratorExact 4-way switch wiring diagrams for three switch locations: power at the first switch or at the light, traveler pairs and commons, plus an AI generator.
GFCI Outlet Wiring Diagram GeneratorExact GFCI outlet wiring diagrams: LINE only, LINE and LOAD with protected receptacles, ground pigtails and test steps, plus an AI generator.
Ceiling Fan Wiring Diagram GeneratorExact ceiling fan wiring diagrams with a light kit: one switch for fan and light or two switches on 14/3 cable, plus an AI generator.
Thermostat Wiring Diagram GeneratorExact thermostat wiring diagrams for heat-only, furnace with AC and heat pump O/B systems: R, C, W, Y and G terminals, plus an AI generator.
Power, backup and equipment wiring
Solar, batteries, chargers, motors and panels.
Solar Panel Wiring Diagram GeneratorGenerate solar panel wiring diagrams: series, parallel, 2S2P to an MPPT controller, and a full off-grid chain, with exact reference diagrams.
Battery Wiring Diagram GeneratorGenerate battery wiring diagrams: main fuse, switch, shunt, series or parallel banks, and DC-DC charging, with exact reference diagrams.
Generator Transfer Switch Wiring Diagram GeneratorGenerate generator transfer switch wiring diagrams: manual switch with inlet box, interlock kit, and automatic transfer switch, with an exact manual switch diagram.
EV Charger Wiring Diagram GeneratorGenerate EV charger wiring diagrams: home Level 2 and NEMA 14-50 outlet installs, with an exact hardwired single-line diagram.
Boat Wiring Diagram GeneratorGenerate boat wiring diagrams: single and dual battery, battery switch, fuse block, bilge pump, and outboard systems, with exact reference diagrams.
3-Phase Motor Wiring Diagram GeneratorExact terminal diagrams for 3, 6, 9 and 12 lead three-phase motors in wye and delta, high and low voltage, plus an AI generator.
Control Panel Wiring Diagram GeneratorGenerate control panel wiring diagrams: DOL motor starters, PLC 24V DC inputs and outputs, and panel layouts, with an exact ladder diagram.
Electrical Panel Schedule GeneratorBuild a printable two-column panel schedule with connected load per phase and phase balance, then export PNG, PDF or CSV.
Single-Line Diagram GeneratorCreate electrical single-line (one-line / SLD) diagrams showing utility, transformers, buses, breakers, and loads.
Symbols and electrical reference charts
Look up a symbol, a wire size or a component value.
Circuit Symbols ChartCircuit symbols chart with resistor, capacitor, diode, transistor and more in ANSI and IEC styles, with SVG and PNG downloads and a printable cheat sheet.
Logic Gate SymbolsAND, OR, NOT, NAND, NOR, XOR, XNOR and buffer in ANSI and IEC symbols, with Boolean expressions, computed truth tables and SVG or PNG downloads.
AWG Wire Gauge ChartAWG wire gauge chart from 0000 to 40 with diameter, mm², kcmil, copper resistance, an AWG to mm² converter, a voltage drop calculator and printable sheets.
Resistor Color Code ChartResistor color code chart for 4, 5 and 6 band resistors with colors to value and value to colors calculators, E series values and printable sheets.
Ohm's Law ChartOhm's law chart with the wheel and triangle, all 12 formulas for voltage, current, resistance and power, a calculator with unit prefixes and printable sheets.
P&ID SymbolsP&ID symbols and PFD symbols chart: vessels, pumps, valves, and instruments in ISA 5.1 style, with SVG and PNG downloads and a printable cheat sheet.
Draw your own diagram
General makers for circuits, schematics and process systems.
- Wiring Diagram MakerCreate professional wiring diagrams and electrical schematics online.
Circuit Diagram MakerCreate professional circuit diagrams for physics and electrical engineering.
Schematic Diagram MakerGenerate accurate scientific schematic diagrams for lab equipment, chemistry setups, and experimental apparatus.
P&ID MakerCreate piping and instrumentation diagrams (P&IDs) with AI — standard ISA symbols, instrument tags, and control loops for tanks, pumps, valves, and heat exchangers.
HVAC Diagram GeneratorCreate HVAC system, refrigerant-cycle, and airflow diagrams for class, bids, or service notes.
Refrigeration Cycle Diagram GeneratorDraw the vapor-compression cycle and an R-134a P-h diagram from temperatures or enthalpies, calculate q_L, work and COP, and export SVG, PNG or CSV.
Looking for something else? Browse all diagram and chart tools.