Two classes of protection - commercial electrical supply

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Two classes of protection

Class I Protection --

     Use of barrier/insulation and connection of protective conductor to equipment metallic enclosure in order to protect against electric shock


Class II Protection --

    Besides of the basic insulation, addition layer of insulation apply to the enclosure. Therefore no extraneous conductive part . The additional layer is independent to the basic insulation so hat under failure of basic insulation, it offers additional protection
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MarkStonis
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