The Electrical System gallery offers 159 illustrations of household wiring, switches, and other electrical elements. For electrical lighting, please see the Electric Lighting gallery.

Manipulation of the special flooring saw. (Finishing the cut).

Saw

Manipulation of the special flooring saw. (Finishing the cut).

Sectional elevation showing construction of the Ames-Stumph uniflow engine.

Sectional Elevation

Sectional elevation showing construction of the Ames-Stumph uniflow engine.

Oil-cooled or self-cooling transformer. (Tubular type)

Self Cooling Transformer

Oil-cooled or self-cooling transformer. (Tubular type)

Series lighting circuits.

series lighting circuits

Series lighting circuits.

A series circuit service switch.

service switch

A series circuit service switch.

A sheet-metal panel box.

Sheet-metal Panel Box

A sheet-metal panel box.

Size wire for motor line.

Size Wire

Size wire for motor line.

A method of slotting joist for the reception of a conduit.

Slotting Joist

A method of slotting joist for the reception of a conduit.

Multiple-plate static discharger. (Grid should bridge both sides of belt and should be as close to the motor as possible).

Static discharger

Multiple-plate static discharger. (Grid should bridge both sides of belt and should be as close to the…

Losses in a non-condensing steam plant.

Steam Plant

Losses in a non-condensing steam plant.

Flexible steel armored cable.

Steel Cable

Flexible steel armored cable.

In electronics, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another.

Electric Switch Handle

In electronics, a switch is an electrical component that can break an electrical circuit, interrupting…

A small "standard-unit" switchboard for two compound-wound direct-current generators and seven feeders.

Switchboard

A small "standard-unit" switchboard for two compound-wound direct-current generators and seven feeders.

Front view of a switchboard panel for a single compound-wound direct-current generator.

Switchboard Panel

Front view of a switchboard panel for a single compound-wound direct-current generator.

Unit switchboard panels for 600-volt, direct-current, railway service.

Switchboard Panels

Unit switchboard panels for 600-volt, direct-current, railway service.

A three phase circuit and voltmeter ground detector.

three phase circuit

A three phase circuit and voltmeter ground detector.

Symmetrical arrangement of conductors; an example of a three-phase circuit.

Three-phase Conductors

Symmetrical arrangement of conductors; an example of a three-phase circuit.

A high-speed simple engine belted to a small, three-phase generator.

Three-phase Generator

A high-speed simple engine belted to a small, three-phase generator.

Perspective view of the typical 2400-volt, three-phase switchboard for power and lighting service in a small town.

Three-phase Switchboard

Perspective view of the typical 2400-volt, three-phase switchboard for power and lighting service in…

The four-wire, three-phase system.

Three-phase System

The four-wire, three-phase system.

A diagram illustrating one type of time-limit relay.
Diagrammatic drawing of a time-limit circuit breaker.

Time Limit

A diagram illustrating one type of time-limit relay. Diagrammatic drawing of a time-limit circuit breaker.

An open, portable transformer with inserted cable.

Transformer

An open, portable transformer with inserted cable.

An air-blast transformer installation.

Transformer Installation

An air-blast transformer installation.

A typical transformer sub-station.

Transformer Sub-station

A typical transformer sub-station.

Runner of a mixed-flow turbine.

Turbine

Runner of a mixed-flow turbine.

Arrangement of the electrical equipment in a modern steam-turbine generating station.

Turbine Station

Arrangement of the electrical equipment in a modern steam-turbine generating station.

A schematic diagram for an ungrounded neutral three-phase electrolytic protector.

Ungrounded Protector

A schematic diagram for an ungrounded neutral three-phase electrolytic protector.

Sectional elevation through the cylinder of a Skinner-poppet-valve uniflow engine.

Uniflow Engine

Sectional elevation through the cylinder of a Skinner-poppet-valve uniflow engine.

An automatic voltage regulator for small capacity exciters mounted on a 31 inch panel for insertion in a switchboard.

Voltage Regulator

An automatic voltage regulator for small capacity exciters mounted on a 31 inch panel for insertion…

The water-cooled transformer.

Water-cooled Transformer

The water-cooled transformer.

A gravity-type waterwheel, the most efficient wheel for very low heads and small quantities of water.

Waterwheel

A gravity-type waterwheel, the most efficient wheel for very low heads and small quantities of water.

A Westinghouse oil-insulated, self-cooling choke coil for pressures from 25,000 to 70,000 volts.

Westinghouse

A Westinghouse oil-insulated, self-cooling choke coil for pressures from 25,000 to 70,000 volts.

A Westington electrolytic protector for a three-phase, ungrounded neutral 22,000-volt circuit.

Westington

A Westington electrolytic protector for a three-phase, ungrounded neutral 22,000-volt circuit.

A wireman running flexible armored cable in a flooring space.

Wireman

A wireman running flexible armored cable in a flooring space.

A method of running wires past bracing.

Wires

A method of running wires past bracing.

Wiring where a panel box is necessary.

Wiring

Wiring where a panel box is necessary.

Wiring a small frame building.

Wiring a Building

Wiring a small frame building.

Exploring a wiring space with flash lamp and mirror.

Wiring Space

Exploring a wiring space with flash lamp and mirror.

The principles of operation of the Wright demand meter.

Wright Meter

The principles of operation of the Wright demand meter.