Ques. How does slow burning weather proof wire compare with weather proof wire?
Ans. It is less inflammable and less subject to softening under heat.
Ques. Where should slow burning weather proof wire be used?
Ans. In places where the wires are to be run exposed and where moisture resisting quality is desired, also where at the same time it is desirable to avoid an excess of inflammable covering.
Ques. How should it be installed?
Ans. It should be set on glass or porcelain insulators.
Miscellaneous Insulated Conductors
Fig. 812.—Armoured submarine cable. This type of cable is insulated with a rubber compound containing not less than 30% of pure Para rubber. The following specifications have been adapted by various telegraph companies and the United States Government for general use.