Telephone And Telegraph Engineers' Handbook : a Convenient Reference book for All Persons Interested in Telephone And Telegraph Systems, Location of Faults, Electricity, Magnetism, Electrical Measurements, And Batteries
Telephone And Telegraph Engineers' Handbook : a Convenient Reference book for All Persons Interested in Telephone And Telegraph Systems, Location of Faults, Electricity, Magnetism, Electrical Measurements, And Batteries
International Correspondence Schools
The book Telephone And Telegraph Engineers' Handbook : a Convenient Reference book for All Persons Interested in Telephone And Telegraph Systems, Location of Faults, Electricity, Magnetism, Electrical Measurements, And Batteries was written by author International Correspondence Schools Here you can read free online of Telephone And Telegraph Engineers' Handbook : a Convenient Reference book for All Persons Interested in Telephone And Telegraph Systems, Location of Faults, Electricity, Magnetism, Electrical Measurements, And Batteries book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Telephone And Telegraph Engineers' Handbook : a Convenient Reference book for All Persons Interested in Telephone And Telegraph Systems, Location of Faults, Electricity, Magnetism, Electrical Measurements, And Batteries a good or bad book?
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above rail. Lowest wire crossing a public road should be at least 19 ft. above crown of road. Standard telephone and telegraph cross-arms are 3i in.X4l in., and so-called telephone cross-arms are 2}in.X3i in. For telephone drop lines, extending from line or cable to ' the house, many companies use a rubber-covered and braided copper, and occasionally iron, wire of No. 14 or 16 B. ft S. gauge. Usually this wire comes twisted in pairs, but occa- sionally two single wires are used. Digitized by Go...ogle 154 MAGNETISM 0 00 « 0> t>. t>. 00 fH O »H i-icsico'5«N.o«oc* ousgocooNNoo _ 5 0» 00t>. OS O lO N. -^ t^ CO CO o> O 00 5 1>: ^ t^ »o 00 lo p »o "^ -^^ oq ^, CO CO OS CO CO u3 00 «; *^'^'cTt4N.QQ i»'00O»O00C0'^'-Hi-iQQ «0S>OC0>O000S00(O>O00tO00tO^O00 »-»O»0O0Si-i®^^ i-iC^t^F-lQQpiO.-il^U300OQ^tQC0»O«-«^ ®0'^t*OO^OS"^«OCMWiOOQQ^O»0
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