Insulator

An electrical insulator is a material whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field. This contrasts with other materials, semiconductors and conductors, which conduct electric current more easily. The property that distinguishes an insulator is its resistivity; insulators have higher resistivity than semiconductors or conductors.

A perfect insulator does not exist, because even insulators contain small numbers of mobile charges (charge carriers) which can carry current. In addition, all insulators become electrically conductive when a sufficiently large voltage is applied that the electric field tears electrons away from the atoms. This is known as the breakdown voltage of an insulator. Some materials such as glass, paper and Teflon, which have high resistivity, are very good electrical insulators. A much larger class of materials, even though they may have lower bulk resistivity, are still good enough to prevent significant current from flowing at normally used voltages, and thus are employed as insulation for electrical wiring and cables. Examples include rubber-like polymers and most plastics which can be thermoset or thermoplastic in nature.

Insulators are used in electrical equipment to support and separate electrical conductors without allowing current through themselves. An insulating material used in bulk to wrap electrical cables or other equipment is called insulation. The term insulator is also used more specifically to refer to insulating supports used to attach electric power distribution or transmission lines to utility poles and transmission towers. They support the weight of the suspended wires without allowing the current to flow through the tower to ground.

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Matching Insulator Colleges

Scholarships for Insulator Majors

Bullet name award deadline Link

Nat Moore Vocational Grant

Miami Dolphins

$3,500 Varies See Details

Nat Moore Vocational Grant

Miami Dolphins

award

$3,500

deadline

Varies
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Steve Hunter Memorial Scholarship

Decatur County Community Foundation

$1,500 February 01, 2020 See Details

Steve Hunter Memorial Scholarship

Decatur County Community Foundation

award

$1,500

deadline

February 01, 2020
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Merit Shop Construction Scholarship

Associated Builders and Contractors, Inc. - Keystone Chapter

Up to $4,000 February 28, 2020 See Details

Merit Shop Construction Scholarship

Associated Builders and Contractors, Inc. - Keystone Chapter

award

Up to $4,000

deadline

February 28, 2020
See Details

Elmhurst Rotary Club Vocational/Technical Scholarship

College of DuPage

$1,000 March 31, 2020 See Details

Elmhurst Rotary Club Vocational/Technical Scholarship

College of DuPage

award

$1,000

deadline

March 31, 2020
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Attie M. Austin Memorial Scholarship

Decatur County Community Foundation

$1,000 February 01, 2020 See Details

Attie M. Austin Memorial Scholarship

Decatur County Community Foundation

award

$1,000

deadline

February 01, 2020
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NAWIC Undergraduate Scholarship

National Association of Women In Construction

Up to $2,000 February 28, 2020 See Details

NAWIC Undergraduate Scholarship

National Association of Women In Construction

award

Up to $2,000

deadline

February 28, 2020
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GCHS Class of 1941 and 1942 Scholarship

Decatur County Community Foundation

$800 February 01, 2020 See Details

GCHS Class of 1941 and 1942 Scholarship

Decatur County Community Foundation

award

$800

deadline

February 01, 2020
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MRCA Foundation Scholarship

Midwest Roofing Contractors Association (MRCA)

Varies March 01, 2020 See Details

MRCA Foundation Scholarship

Midwest Roofing Contractors Association (MRCA)

award

Varies

deadline

March 01, 2020
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Kyler Raffaelli Memorial Scholarship Fund

Shiawassee Community Foundation

Varies January 31, 2020 See Details

Kyler Raffaelli Memorial Scholarship Fund

Shiawassee Community Foundation

award

Varies

deadline

January 31, 2020
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Devin Allen Swatman Memorial Scholarship

Shiawassee Community Foundation

Varies January 31, 2020 See Details

Devin Allen Swatman Memorial Scholarship

Shiawassee Community Foundation

award

Varies

deadline

January 31, 2020
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