Articles
Symbols, conventions and checks, written for the trade.
How a two-way (three-way) switch pair controls one light from two places, what an intermediate (four-way) switch adds for a third place, how each is drawn on the plan, and a simulator to flick.
How to estimate the load on each circuit of a house from what is on it, at 230 V or at 120 V, why the figure is only indicative, and a calculator with the typical loads to try on your own circuits.
What a house electrical plan contains, how it differs from a wiring diagram and a lighting plan, who draws it, and how to read one in five minutes, with a drawn room and a real plan to look at.
Every symbol on an electrical floor plan in the IEC 60617 and the US convention, from the socket to the board, with a drawn room to read them on and a chart of all 71 devices you can search.
Seven steps from the floorplan to the PDF the client signs: get the drawing, list what each room needs, place the symbols, group the circuits, draw the wiring, check it, export it. With a figure for each.
How European (IEC 60617) and American electrical plans differ, mark by mark and word by word. Sockets and receptacles, two-way and three-way, RCD and GFCI, 230 V and 120 V, A4 and Letter. With a room you can switch between the two.
Three checks that catch most mistakes on an electrical plan while they are still cheap. Does every device reach the board, does each switch control the right light, is any circuit carrying too much. Try each one here.