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    By Miles Nicholson 


    Components used in AutoCAD® Electrical are named specifically around family codes and these Family Codes correspond to the manufacturers parts table names found in the default_cat.mdb database file. When you select Catalogue Lookup to assign a part number, AutoCAD® Electrical looks at the 2nd and 3rd character in the symbol's file name and opens the associated catalogue database table. A contactor coil as an example has a symbol block name of VMS1 or HMS1 and will therefore look up the MS table when Catalogue Lookup is selected.