. American telephone practice . ors to which the external circuits areto be Sometimes this housing assumes the form of a cylin-drical can of galvanized iron, as in the case shown in Fig. 607, andis better illustrated for a large terminal in Fig. 609. Whore apothead is used the general practice is to support it in an uprightposition on the pole, having its upper end extending into a woodencable box containing conductor strips, lo which the wires leadingfrom the pothead and those leading to the outside circuits may be 832 AMERICAN TELEPHONE PRACTICE. joined. This construction is applied
. American telephone practice . ors to which the external circuits areto be Sometimes this housing assumes the form of a cylin-drical can of galvanized iron, as in the case shown in Fig. 607, andis better illustrated for a large terminal in Fig. 609. Whore apothead is used the general practice is to support it in an uprightposition on the pole, having its upper end extending into a woodencable box containing conductor strips, lo which the wires leadingfrom the pothead and those leading to the outside circuits may be 832 AMERICAN TELEPHONE PRACTICE. joined. This construction is applied to a multiple tap as shown indetail in Fig. 610, this being the standard construction of one ofthe large Bell companies. In the case of Fig. 610 the wires leading to the subscribersstations are taken off on insulators attached to cross arms, while inother cases what are called distributing rings or circle tops, of whichone is shown in Fig. 611, are provided. Methods of distribution from aerial cables to subscribers prem- *z±^. FIG. 611.—DISTRIBUTING RING OR CIRCLE TOP. ises differ greatly. The old method was to terminate the cable ona pole and then to continue the conductors as bare wires on crossarms until the destination of a pair was reached, after which dropwires were run from the pole nearest the subscribers premises tohis house. This bare wire distribution has largely gone out of useand plants have been constructed in this country in which hardly afoot of bare wire was used. This latter practice, however, is thoughtto be carrying the cable idea to an extreme. At present the best AERIAL CABLE CONSTRUCTION. 833 practice after terminating the cable by any of the methods described,is to run a No. 18 B. & S. rubber-covered braided wire from theterminal in the cable box to the distributing insulator on the samepole, and then drop off from its insulator with the drop wire to thesubscribers premises. Drop wires differ largely, both bare and in-sulating wire being used. Drop w
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