12:8 Technical information Connecting materials Elpress uses copper, brass and aluminium as terminal materials. The copper and brass products are electrolytically tin plated for increased corrosion resistance. In a bimetal (copper aluminium) terminal, the copper part is untreated. Brass Brass is mainly used for flat pin sleeves in areas up to 6 mm², where good suspension properties are desired. Brass is an alloy of about 70% copper and about 30% zinc and has very good cold form properties. Copper The copper used by Elpress for terminals has a purity of at least 99.95 %. Its excellent properties for use in electrical terminals are among the following: • high conductivity (only silver is better) • high corrosion resistance • good formability • good sealability In manufacturing the neck of the terminal element is soft soldered in order to obtain as good form properties and good enclosure around the conductor as possible during the contact crimping. This then provides a terminal that exhibits low transitional resistance and good mechanical properties. Aluminium The aluminium used for through connectors and cable terminals has a purity of at least 99.7 % and its excellent qualities are: • low weight • strong, in relation to its weight • good electrical conductivity, approximately 60% of the conductivity of copper • easy to work with Conductor design Cable standard IEC 60228 provides: Information about materials, construction and resistance values for both copper and aluminium conductors. Class 1 solid conductor Class 2 stranded conductor Class 5 flexible conductor Class 6 highly flexible conductor UL-approved terminals KR/KS, KRF/KSF, KRFS, KRT/KST UL approved in accordance with file no. E205350. UL certified products are delivered with UL marking on the label including the UL file number and/or certification code for control by an UL inspector. The certificate can be downloaded at UL Product IQ. MCM and AWG cross-reference table to the corresponding area in mm² MCM No. Area mm² AWG No. Area mm² 250 127 36 0,013 300 152 34 0,020 350 177 32 0,032 400 203 30 0,051 450 228 28 0,080 500 253 26 0,13 550 279 24 0,20 600 304 22 0,33 650 329 20 0,56 700 355 19 0,65 750 380 18 0,82 800 405 17 1,04 850 431 16 1,31 900 456 15 1,65 1000 507 14 2,08 1100 557 13 2,62 1200 608 12 3,31 1300 659 11 4,17 1400 709 10 5,26 1500 760 9 6,63 1600 811 8 8,37 1700 861 7 10,6 1800 912 6 13,3 1900 963 5 16,8 2000 1013 4 21,2 3 26.4 2 33.6 1 42.4 1/0 53,5 2/0 67,4 3/0 85,5 4/0 107 Remarks: 1. The information in this table comes from catalogues published by respected cable providers and does not refer to official standards. 2. The types relating to AWG vary depending on the different design of the conductors, i.e. the number of strands. AWG > 20 refers to single strand conductors. AWG ≤ 20 refers to multi stranded conductors. Exact areas for specific number of strands can be found in cable provider catalogues.
RkJQdWJsaXNoZXIy NTYxNjk=