ClipArt ETC
An Edison fuse plug and casing for switchboard use.

fuse plug and casing

An Edison fuse plug and casing for switchboard use.

Fuse protection for voltmeter and ground detector on a direct-current switchboard. Fuse protection on instrument circuit of an alternating-current switch-board.

Fuse protection

Fuse protection for voltmeter and ground detector on a direct-current switchboard. Fuse protection on…

Instrument post used instead of a panel switchboard.

Instrument Post

Instrument post used instead of a panel switchboard.

Rear elevation of the switchboard with the perspective and front views.

Rear Elevation of Switchboard

Rear elevation of the switchboard with the perspective and front views.

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.

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…

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…