A guide to some common standards and classifications encountered in engineering.

    Approval Bodies and Commissions
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    Standard Component Values
 Click for more. BS 2488, IEC pub 63
    IP Ratings
 Click for more. BS 5420:1977, BS 5490:1977, IEC 144:1963, IEC 529:1976
    Insulation Groups
 Click for more. VDE 0110
    Flammability Classifications
 Click for more. UL 94
    Utilisation Categories for Contactors
 Click for more. IEC 947-4
    Cable Sizes for Building Installation
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