Consolidated Design Number Summary
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Contents |
Battery Rests
CD 10 to CD 99 - battery rests
Small Unipart pin-type
CD 100 to 144 - side wire groove, single petticoat
CD 145 to 184 - side wire groove, double petticoat
CD 185 to 189 - pinhole goes through the insulator
CD 190 to 205 - transpositions - multiple grooves and may consist of a pair of insulators mounted on a single pin
CD 206 to 249 - saddle groove, double petticoat
CD 250 to 279 - cable top, single or double petticoat
CD 280 to 289 - side wire groove, triple petticoat
CD 290 to 309 - saddle groove, triple petticoat
Sleeves
CD 310 to 314 - sleeves (used to protect the pins on multipart insulators)
Large Unipart Power pieces
CD 315 to 334 - umbrella type large power pieces, one-piece
Multipart Power Pieces
CD 335 to 375 - umbrella type large power pieces, multi-part cemented together
Foreign threaded pintype insulators
There are a number of foreign CD styles that are the same as the North American styles. In these cases, the CD assigned for the North American insulator is used.
(selected styles that are the same as North American styles use CD 100 to 334)
CD 335 to 399 - two and three part high tension styles (cemented)
CD 400 to 499 - side groove, single or double petticoat
CD 500 to 599 - saddle groove, single or double petticoat
CD 600 to 639 - flared skirt, double or triple petticoat
CD 640 to 649 - side groove with support arms, single or double petticoat
CD 650 to 659 - cutout or fuse holder styles
CD 660 to 685 - one or two arms for securing low voltage pairs or drop lines
CD 686 to 699 - unique styles for applications involving two or more special features
Threadless pintype insulators
CD 700 to 700.1 - "Egg" pinhole goes all the way through the insulator
CD 701 to 718 - "Egg" pintypes
CD 721 to 725 - pintype, for use with a wood cover
CD 726 to 728.8 - side wire groove "signal", straight skirt
CD 729 to 732.2 - side wire groove "signal", concave skirt
CD 734 to 735.5 - side wire groove "Pilgrim Hat", one wire ridge
CD 735.6 to 739.5 - side wire groove "Pilgrim Hat", two wire ridges
CD 740 to 742.3 - side wire groove "Pilgrim Hat", rounded dome
CD 743.1 to 743.3 - side wire groove "Beehive"
CD 780 - "Bureau Knob"
CD 784 - 796 - Cross top, slash top, teapot and other miscellaneous styles
Obsolete Foreign pintype insulators
CD 800 to 999 - reassigned to CD numbers CD 376 to 699.
Glass blocks, spools, dead end insulators and miscellaneous styles
This section includes both North American and Foreign styles
CD 1000 to 1016 - glass blocks
CD 1030 to 1040 - miscellaneous glass
CD 1049 to 1100 - glass spool and nail knobs
CD 1130 to 1142 - guy wire strains
