The Electrical System gallery offers 159 illustrations of household wiring, switches, and other electrical elements. For electrical lighting, please see the Electric Lighting gallery.
An air-insulated choke coil for pressures up to 150,000 volts.
Horn-gap, choke-coil protector for alternating-current lines.
An outlet box attached to the ceiling.
A 90 degree angle connector.
A Multigap alternating-current arrester with series resistance arranged for pole mounting.
A cross section of a General Electric company 115,000 - 135,000 volt electrolytic arrester tank.
Boiler house and generating station of the Remington Arms and Ammunition Company in Bridgeport, Connecticut.
An assembled bracket box and fixture stud.
A device that trips like a switch and opens the circuit when overloaded.
A building wired for double-pole switches.
A Burke suspension lightning protector for pressures of up to 6600 volts.
A 100-amp choke coil designed for pressures of up to 6600 volts.
"A medium-capacity, double-pole circuit breaker (250 volts, 200 amp. General Electric Company, type…
"A heavy-current (2000 amp.) 650-volt, single-pole overload circuit breaker (General Electric Company,…
A medium capacity double pole circuit breaker (250 volt, 200 amp. General Electric Company, type C,…
A heavy current (2000 amp.) 650 volt, single pole overload circuit breaker (General Electric company,…
"Diagrammatic drawing of a time-limit circuit breaker." —Croft 1920
The diagram of "circuit-breaker type" lightning protector.
An umbrella being used for catching dirt at a ceiling outlet.
A Westinghouse "pancake type" choke coil for pressures from 2200 to 25000 volts.
Arrangement of two-phase conductors on cross arms.
Installation of a concealed conduit where the conduit run is available.
Second story floor boards removed and a conduit placed in the joist slot.
Conduit lines installed in an elevator shaft in a finished building.
Vertical conduit run to serve different floors or different apartments.
Rigid conduit switchbox in position.
Conduit runs supported on the outside of a building.
Methods of connecting an alternate-current demand meter for 440 and 660-volt loads. For 110 and 220-volt…
A flexible connector connected to a rigid connector.
Construction around windows.
A plan of the desk's face and front elevation of the control desk instrument board.
Westinghouse control pedestal used in combination with an instrument post.
Sectional elevation showing a typical arrangement of a synchronous converter sub-station for electric…
A cupped-disc-gap protector.
The path of current through person receiving a shock from the frame of a machine insulated from the…
Cross section of Ashoken Dam.
The Wright demand meter.
A dirt catching device assembled and cross-sectioned.
Front view of the five-panel direct-current switchboard.
Method of drying out a generator by short-circuiting the armature through a water rheostat.
Pathway of leakage due to the installation on damp insulation.
A combination pumping and electric-light plant driven by a gravity waterwheel.
The cover of the National Light Association booklet.
Sectional elevation of a General Electric Company electrolytic protector.
Westinghouse equalizer pedestal with a switch for compound-wound direct-current generator.
Sectional elevation of the turbine building of the Essex Station.
An exposed conduit installation.
Exterior view of building that was wired.
Fasteners for Kuhlo wire.
Supporting fixture from an attic.
A flexible conduit connected to a flexible conduit.
Manipulation of the special flooring saw. (Starting the cut).
Typical framing of a wooden building.
An Edison fuse plug and casing for switchboard use.
Fuse protection for voltmeter and ground detector on a direct-current switchboard. Fuse protection on…
"Fuse protection on instrument circuit of an alternating-current switchboard." —Croft 1920
"Edison fuse plugs and casings for switchboard use." —Croft 1920
"Illustrating fuse protection for voltmeter and ground detector and ground detector on a direct-current…
"Edison fuse plug cutout for switchboard use." —Croft 1920