The Most-Searched Wiring Diagrams: An Analysis of 2,959 Electrical-Diagram Search Queries
We grouped 2,959 wiring-, circuit- and schematic-diagram search queries into 2,434 topics and ranked them by estimated monthly search volume — about 3.9 million searches a month in total — to see what people actually look up when they wire something. Wiring a 3-way switch is the single most-searched task by a wide margin.
Key findings
- 329,000 / mo — Wiring a 3-way switch is the most-searched electrical task online — 2.7× the next-biggest topic, the 2-way switch (123,000/mo).
- ~620,000 / mo — Light-switch wiring of all kinds (3-way, 2-way, 4-way, single) is the largest pocket of demand — more than any automotive or industrial topic.
- 79% — Of the 2,431 distinct topics get under 1,000 searches a month. Wiring demand is a long tail of thousands of specific questions, not a few big ones.
The 12 most-searched wiring topics
| Topic | Estimated monthly searches |
|---|---|
| 3-way switch | 329,070 |
| 2-way switch | 122,970 |
| Ignition system (automotive) | 71,670 |
| Relay | 53,890 |
| 7-pin trailer connector | 49,800 |
| 2-way light switch | 49,800 |
| Light switch | 45,520 |
| 4-way switch | 32,480 |
| Star-delta starter | 31,900 |
| Alternator | 31,270 |
| Series & parallel circuits | 24,300 |
| DOL motor starter | 23,000 |
Search demand by domain
Across 2,431 topics (3,444,160 estimated monthly searches, after removing a generic catch-all cluster and two data artifacts), demand splits like this:
| Domain | Share | Est. monthly searches | Topics |
|---|---|---|---|
| General / unspecified | 35.5% | 1,221,960 | 1,313 |
| Home & building wiring | 34.9% | 1,201,650 | 628 |
| Industrial & motor control | 8.6% | 296,270 | 111 |
| Automotive | 8.3% | 287,210 | 181 |
| Trailers & towing | 7.9% | 272,100 | 66 |
| Electronics | 2.6% | 87,930 | 70 |
| Solar & battery | 2.2% | 77,040 | 62 |
Methodology
Source data is a set of monthly search-volume estimates from a third-party keyword tool (Mangools KWFinder) for wiring-, circuit-, schematic- and electrical-diagram queries. We clustered 2,959 queries into 2,434 topics and summed estimated volume per topic. For the category breakdown we excluded one generic catch-all cluster and two data artifacts (a term whose volume is inflated by an unrelated adult-search collision, and a misspelling cluster), leaving 2,431 topics and 3,444,160 estimated monthly searches; closely-related phrasings are counted as separate query clusters. Keyword-tool volumes are estimates, not measured traffic, so treat the numbers as relative demand rather than exact counts. Analysis run 15 June 2026 by the team behind CircuitDiagramMaker.
Cite this study
CircuitDiagramMaker (2026). The Most-Searched Wiring Diagrams: An Analysis of 2,959 Electrical-Diagram Search Queries. https://circuitdiagrammaker.app/research/most-searched-wiring-diagrams