earthed switch
11Third-brush dynamo — A Third brush dynamo was a type of electrical generator formerly used for battery charging on motor vehicles. It was superseded, first by a two brush dynamo equipped with an external voltage regulator, and later by an alternator. As the name… …
12Printed circuit board — Part of a 1983 Sinclair ZX Spectrum computer board; a populated PCB, showing the conductive traces, vias (the through hole paths to the other surface), and some mounted electrical components A printed circuit board, or PCB, is used to… …
13Fluorescent lamp — A fluorescent lamp or fluorescent tube is a gas discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light.Unlike… …
14Electricity Supply Board — Infobox Company company name = Electricity Supply Board company company type = Statutory Corporation foundation = Dublin, Ireland (1927) location = Dublin, Ireland key people = Padraig McManus, CEO Lochlann Quinn Chairman num employees = 7000… …
15Earthing system — In sulvent systems, an earthing system defines the electrical potential of the conductors relative to that of the Earth s conductive surface. The choice of earthing system has implications for the safety and electromagnetic compatibility of the… …
16Patch cable — A patch cable or patch cord (sometimes patchcable or patchcord) is an electrical or optical cable, used to connect ( patch in ) one electronic or optical device to another for routing. Devices of different types (ie: a switch connected to a… …
17Maritime mobile amateur radio — An emergency portable boat radio transceiver, Museal ship S/S Sołdek in Gdańsk, Poland Most countries amateur radio licences allow licensed operators to install and use radio transmission equipment while at sea. Such operation is known as… …
18IEC 60320 — IEC connector redirects here. For other uses, see IEC connector (disambiguation). IEC 60320 is a set of international standards specifying non locking electrical power couplers for the connection of power supply cords to electrical appliance up… …
19Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge …
20Diesel locomotive — Three styles of diesel locomotive body: cab unit, hood unit and box cab. These locomotives are operated by Pacific National in Australia …
