SPECIFICATION FOR THE SHANGHAI CABLE.
1. Lengths of Cable per nautical mile of 2,029 yards :
Main cable A
Intermediate Cable B
Shore-end Cable C
Shore-end Cable D
Total length of Cable
MAIN CABLE A.
685 nautical miles. 272
111
30
25
1,098
"2
2. Core. Copper 7 wire strand weighing per nautical mile 300 lbs. Dielectric to be of Hooper's patent India rubber, weighing per nautical mile exclusive of the felt 200 lbs.
3. Serving. A good and sufficient serving of preserved best jute yarn.
4. Outer covering. 17 BB galvanised iron wires No. 13 BWG each 0.095" diameter weighing per nautical mile about
5. Outer protection. To be asphalte and silicate compound laid on in two coatings with two layers of jute yarn between as hereafter specified.
The outer diameter not to exceed 0.85′′.
The gross weight not to exceed 1 ton 16 cwt. per nautical mile.
500 lbs.
2,510,
INTERMEDIATE CABLE B.
6. Core. Same as for Cable A
500
7. Serving. A good and sufficient serving of preserved best jute yarn.
8. Outer covering, 12 BB galvanised iron wires No. 8 BWG each 0.160′′ diameter weighing per nautical mile about
5,023,
9. Outer protection. To be asphalte and silicate compound laid on in two coatings with two layers of jute yarn between as hereafter specified.
The outer diameter not to exceed 1.06"
The gross weight not to exceed 3 tons 1 cwt. per nautical mile.
SHORE-END CABLE C.
10. Core. Same as for Cable A
500,
11. Serving. A good and sufficient serving of preserved best jute yarn.
12. Outer covering. 9 BB galvanised iron wires No. 1 BWG each 0.300" diameter, weighing per nautical mile about
13,311
22
5
SHORE-END CABLE D.
14. Intermediate. Cable B as specified above inside.
15. Serving. A, serving of yarn outside the cable B.
16. Outer Cov ring. 12 BB Galvanized iron wires, No. 00 BWG, cach 0-380" diameter, weighing per nautical mile about 28,501lbs.
17. Outer Protection. To be asphalte and silicate compound, laid on in two coatings with two layers of jute yarn between as hereafter specified.
18. Conductor. The conductor to consist of a seven wire strand of annealed tinned copper wires of the best quality and manufacture.
The conductor to have a conductivity of not less than 90° of pure copper. 19. Dielectric. The dielectric of Hooper's India-rubber to be of the best quality and manufactured and applied according to Hooper's patent.
The resistance of the Dielectric at 75° Fahrenheit to be not less than 3,500 millions of B.A. units per nautical mile after one minute's electrification, while being tested the core shall be immersed in water at the temperature of 75o Fahrenheit, and shall have been previously maintained at that temperature for 24 hours.
The resistance of the Dielectric also to be tested and certified by ascer- taining the loss in charge after one minute's electrification and insulation. The inductive capacity not to exceed at an average 0440 farads nautical mile.
per
20. Joints in the Core. The joints in the core are to be made by experienced workmen. No joint in the completed core neither at the Core works nor at the Cable works is, under any circumstances, to be made except in the presence of the Inspectors, who will be appointed by the Contractor for this duty, and who will test and pass each joint.
The mode of making joints as well as a standard for, and the mode of test- ing the joints to be agreed upon between the Contractor and the Company's Engineer or his Deputy.
21. Serving.The serving of the preserved jute yarn to be applied wet, and all care to be taken in its application.
22. Iron Covering. The iron wires are to be of the quality known as best best, free from splinters and irregularities, annealed and galvanized. No wire of brittle quality shall be put into the cable, and no weld in any of the iron wires to be made within 12 feet of any other weld.
23. Outer Protection. The cables are to be covered after the iron wires are laid on and before being coiled into the tanks with two coatings of a com- pound with two layers of jute yarn between; the compound to consist of asphalte and silicate and tar in such proportions as may be agreed upon between the Contractor and the Northern Company's Engineer or his deputy.
of
This first coating of the compound being next the wires, then a serving yarn, then a second coating of compound, and lastly, a close serving of tarred jute yarn, laid in opposite direction of the first serving; precautions are to taken against the heating of the core, in case of the machinery stopping, The first serving of yarn is to be everywhere covered by the compound and the outside is to be smooth and regular.
24. Taper Cable.-The intermediate Cable B, as well as the shore-end Cables C and D, are to be finished off with a taper not less than three-quarters of a mile in length, and to be arranged to the satisfaction of the Company's Engineer or his Deputy.
THOMAS FULLER, Serretary,
Chino Submarine Telegraph Company, Limited.
The Board of Directors of The Great Northern Telegraph China and Japan Extension Company.
C. F. TIETGEN," Chairman.
13. Outer protection. To be asphalte and silicate compound laid on in two coatings with two layers of jute yarn between as hereafter specified.
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Waterlow at Sole, Frinters, Carpenters' Hatt, Lundun Wall,