APPENDIX E STANDARD SPECIFICATIONS 



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3 Specifications for Hard-drawn Copper Telephone Wire 



General. The material shall be copper of such quality and purity that when 

 drawn hard it shall have the properties and characteristics herein required. The 

 manufacture, workmanship, and finish must be in accordance with the best commercial 

 practice. 



Manufacture. Each coil shall be drawn in one length and be exempt from joints 

 or splices. All wire shall be truly cylindrical and shall conform to gauge within the 

 limits of variation permitted by these specifications. It must not contain any scale, 

 inequalities, flaws, cold shuts, seams, or other imperfections. 



MECHANICAL AND ELECTRICAL REQUIREMENTS 



Shipping. The wire shall be made up into coils the eye of which shall have a 

 maximum diameter of 22 in. and a minimum diameter of 18 in., and shall be securely 

 tied by not less than four separate pieces of strong twine, and shall be protected by a 

 sufficient wrapping of burlap so that the wire may not be injured during transporta- 

 tion. The wrappings shall be placed upon the wire bundles, after they have been coiled 

 and secured by the twine. Each coil shall have its gauge, length, and weight plainly 

 and indelibly marked upon two brass tags which shall be secured to the coil, one inside 

 the wrapping and the other outside. 



4 Specifications for Emergency Wire 



General. This wire will be used under all climatic and weather conditions and 

 will be laid out on the ground, or on trees, in continuous lengths not exceeding 30 

 miles, and without the use of insulators. The quality of the material used and the 

 method of manufacture shall be such as to ensure for the wire the properties herein 

 specified. 



Conductor. This wire shall have a conductor consisting of ten strands of No. 30 

 B. & S. gauge hard-drawn copper wire twisted together, the twists per foot not to be 

 less than eight and not more than ten. 



Hard-drawn Copper Wire. The hard-drawn copper wire shall be free from bends, 

 cuts of any dimensions, nicks, splits or splinters, spills, grooves, scraped, surface, wavy 

 surface, flat-sided or oval wire, corrosion, or any irregularities. The diameter of No. 

 '60 hard-drawn copper wire shall not be greater than -01013 in. nor less than -00993 in. 



Covering. A double reverse serving of cotton shall be applied to the twisted 

 conductor so as to form a close, smooth covering. 



Weather-proofing. The cotton covering shall be thoroughly saturated with a per- 

 manent weather-proof compound of such a nature as to preserve the strength of the 

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