. American hydroelectric practice; a compilation of useful data and information on the design, construction and operation of hydroelectric systems, from the penstocks to distribution lines . 200 400 600 SOO 1000 Length of Span in Feet 1200 1400 Fig. 130.—^Tower and Insulator Costs in Dollars per 1000 Feet of Transmission Line Belcher Ground^PWire Clamp. Peirce Glamp Pin Series \ Fig. 131.—A Design of Metal Cross Arm for Voltages up to 60,000. For the 33,000Volt Service Referred to in Table 30, A = 36 in.; B = in.; C = 6 in.; D = 12 in.;E = in.; and F = 50 in. show relative co
. American hydroelectric practice; a compilation of useful data and information on the design, construction and operation of hydroelectric systems, from the penstocks to distribution lines . 200 400 600 SOO 1000 Length of Span in Feet 1200 1400 Fig. 130.—^Tower and Insulator Costs in Dollars per 1000 Feet of Transmission Line Belcher Ground^PWire Clamp. Peirce Glamp Pin Series \ Fig. 131.—A Design of Metal Cross Arm for Voltages up to 60,000. For the 33,000Volt Service Referred to in Table 30, A = 36 in.; B = in.; C = 6 in.; D = 12 in.;E = in.; and F = 50 in. show relative costs of mechanical equipment rather than give any precisedata and must not be taken except as an approximate average for lines in PLANT, LINE AND SUBSTATION COSTS 229 o oaw m I O oo o ■* 0 to 0 iM 0 (N ^OCCQC^IO 0 ■* OCDOIN p q 03 q q co_ q CQ TfCCOOtM 0 IN o ooqqocoq oqqqqcoq a> q q q 0 CO q CT; oj CO Tf! CO c-i C3 CO oj CO •*- c<i oi lo t^ M* CO •*- CO <N id id ■* CO T)< c41^; 0 CO OJOJOit-CDiO t- 03 05 031—COIN •* 00 03 OS t-CO IN CO 00 <r. 031_ CO 0 ^ _oo ■* 0 •* 10 rt ^.3 «« (13 «« % a a a 1=1 1 0 m 0 n 0 m 0 m 05 o pinsbay d tiei erv. 3 pins bay d tie erv. armsand pinsre & bays and tiei Line Superv. armsand pinsre & bays an
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