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    readykilowatt's Avatar
    readykilowatt Posts: 9, Reputation: 1
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    #1

    Apr 7, 2010, 12:11 PM
    Sealed contacts
    Does anybody know what sealed contacts are and what they are used for?
    RickJ's Avatar
    RickJ Posts: 7,762, Reputation: 864
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    #2

    Apr 7, 2010, 12:38 PM

    Sealed contacts?

    Might you be meaning sealed contracts?

    Please clarify exactly what you are asking about... and better yet the situation you are in as to why you are asking.
    tkrussell's Avatar
    tkrussell Posts: 9,655, Reputation: 724
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    #3

    Apr 7, 2010, 12:52 PM
    Sealed contacts are used in switching devices, such as motor or control contactors, to keep the contacts protected from moisture, or in hazardous locations that contain explosive or combustible vapors, such as gasoline, or materials, such as wood dust or baking flour.

    Yes, bread flour can be an explosive material. While flour may not burn very well if a match is put to it, if thrown or blown into the air as a dust, a spark will blow the roof off a building.

    Start reading Article 500 Classified (Hazardous) Locations of the NEC. Don't try to absorb or understand it right off.
    readykilowatt's Avatar
    readykilowatt Posts: 9, Reputation: 1
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    #4

    Apr 7, 2010, 01:03 PM

    Concerning motor control circuits.
    RickJ's Avatar
    RickJ Posts: 7,762, Reputation: 864
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    #5

    Apr 7, 2010, 01:14 PM
    Quote Originally Posted by readykilowatt View Post
    concerning motor control circuits.
    Thanks for clarifying. I apologize for not posting appropriately.
    Clough's Avatar
    Clough Posts: 26,677, Reputation: 1649
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    #6

    Apr 7, 2010, 01:34 PM
    Quote Originally Posted by RickJ View Post
    Thanks for clarifying. I apologize for not posting appropriately.
    I learn new lingo all the time here, Rick!

    It's been quite a learning experience since becoming a part of this site!

    Thanks!

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