High-voltage lines, transmission towers and the multimeter

Earth parallel: 1890–1925. Goal: power carried across the whole island and into every house, and the instruments that keep it safe and find its faults.

Years 52–6419 entries0 procedures written

ID	Achievement	Thread	Built on	About year
18.01	Standard resistors and capacitorsthe made parts every later circuit uses: known values, marked and matched	Making	11.43 11.46 11.48 14.07 14.18	52
18.02	Rectifierlets current pass one way only: alternating current charges batteries, and one meter reads both kinds	Making	14.34 15.28	52
18.03	Multimeterone instrument for volts, amperes and ohms, carried to the fault	Making	14.05 14.18 14.32 18.01 18.02	53
18.04	Suspension insulatora string of porcelain discs that holds a line at a far higher voltage	Making	11.08 11.44 11.49	53
18.05	Aluminium power cable with steel corea light, strong conductor for long spans	Making	10.23 15.46	54
18.06	Transmission towera lattice of steel angles that carries the lines high across country	Making	11.45 11.49 12.07 16.01	55
18.07	Lightning arresterleads a lightning stroke on the line safely to earth	Making	07.38 11.08 15.24	55
18.08	Substation with oil circuit breaker ⚠high voltage stepped down for a district, and a fault cut off in an instant under oil	Making	11.38 14.19 14.37 15.24 18.04 18.07	56
18.09	Lead-sheathed underground cablepower and telephone lines buried under the street	Making	05.27 08.34 12.27 14.20	56
18.10	Electric arc furnace ⚠scrap steel melted by an arc between great carbon rods: fine steels made to order	Making	10.02 14.21 14.37 15.25	57
18.11	House wiring with fuses, switches, sockets and earthingsafe current in every room	Home	11.08 14.20 14.25 15.43	57
18.12	Electricity meter for each housecounts what each household uses, so that power can be paid for	Home	14.18 14.38 18.11	58
18.13	Thermostata strip of two metals bends with heat and switches the current on and off	Making	10.25 11.15 14.07	58
18.14	Electric cooker, kettle and ironheat from resistance wire, just where it is wanted	Home	11.43 11.48 18.11 18.13	59
18.15	Electric soldering irona small heated copper tip for joining wires	Making	05.08 11.48 18.11	59
18.16	Household refrigeratora small sealed cooling machine in the kitchen	Food	14.38 15.31 15.45 18.11 18.13	60
18.17	Electric washing machinea motor turns the tub and the wringer	Home	14.38 14.39 18.11	60
18.18	Fluorescent lampa glowing tube that gives several times the light for the same current	Home	11.14 14.23 14.40 14.46 18.11	62
18.19	Oscilloscopea beam of electrons draws the shape of a changing voltage on a glowing screen	Knowledge	14.40 15.28 18.01 18.02	64