General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

porcelain shell/ copper/ bakelite?/ wax/

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

13.2 cm

Width

8.4 cm

Height

8.2 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Energy-electric

Category

User site

Sub-Category

N/A

Manufacturer

AKA

Trumbull

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Unknown

Period

early 20th century

Canada

An example of a fuse cutout of a type used in Canada. Part of a large and varied collection of over 7500 electrical items acquired and documented by Ontario Hydro in the1960s. The collection was thought to be the largest and most comprehensive of its kind in Canada and was donated to the National Museum of Science and Technology in 1992.

Function

An electrical device which interrupts the flow of electrical current through a piece of apparatus or equipment.

Technical

In the late 1880s the knife switch was improved and provisions made for its use in fusing. They were intended to be placed as near as possible to the point where the wires entered the building and arranged to cut off the entire current. Double pole switches were preferable to single pole because they disconnected the part of the circuit that was out of use. During the period 1900 to 1909, a knife switch and fuse plugs were often incorporated into one unit, for interior use. They were usually in a box but were also built into switch and fuse panels for larger installations (Refs. 2-4).

Area Notes

Unknown

Details

Markings

raised lettering on top reads "30 AMP. 125 V./ T[logo]/ T.E.M. Co."/ raised lettering on underside reads "MAR. 09" and "CAT.NO.701-721"

Missing

4 screws

Finish

glazed white porcelain/ black synthetic/ brass and copper coloured metal

Decoration

N/A