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Glowing Connection Experiments With Alternating Currents Below 1 {\rm A}_{\rm \rms}

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1 Author(s)
Urbas, J. ; Dept. of Eng. Technol., Univ. of North Carolina at Charlotte, Charlotte, NC, USA

It was experimentally shown that a glowing connection can develop in an electrical switch at a terminal connection comprised of a connector that utilizes a spring action against a conductor to provide electrical contact in household electrical appliances where vibration exists, and when the connection is loose. This can happen at a current flow such as 0.6 Arms at 120-V. Further, the glow can provide sufficient heat to degrade plastic in contact with the terminal components. Violent arcing involving intense gasification can then develop on nearby plastic areas, sometimes accompanied by intensely glowing areas inside the plastic. Sometimes the intense glowing areas inside plastic develop without the violent arcing. The intense arcing or the glow inside plastic often develops into flaming, which can be of sufficient intensity and duration to ignite combustible materials near the connection.

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Components and Packaging Technologies, IEEE Transactions on  (Volume:33 ,  Issue: 4 )