. Journal of electricity, power, and gas . Of course, if the systemdepends entirely upon one power plant, the replace-ment of the flume is both difficult and expensive, butfew existing systems of any importance rely entirelyon one plant, and there is usually sufficient capacityavailable during certain periods of the year to allowfor the sJiHtdown of one station. Also an auxiliary June 4. 1910] JOURNAL OF ELECTRICITY, POWER AND GAS 515 steam plant is often cheaper than a tunnel and muchmore useful. Wooden pole lines are also perfectly reliable inour California climate and are a very worthy sub-
. Journal of electricity, power, and gas . Of course, if the systemdepends entirely upon one power plant, the replace-ment of the flume is both difficult and expensive, butfew existing systems of any importance rely entirelyon one plant, and there is usually sufficient capacityavailable during certain periods of the year to allowfor the sJiHtdown of one station. Also an auxiliary June 4. 1910] JOURNAL OF ELECTRICITY, POWER AND GAS 515 steam plant is often cheaper than a tunnel and muchmore useful. Wooden pole lines are also perfectly reliable inour California climate and are a very worthy sub-stitute for the steel tower lines in respect to businessdevelopment, and there is nothing to prevent theconstruction of the tower line when the wooden polehas outlived its usefulness; no interruption of serviceis necessary, as the right of way should be wideenough to accommodate both lines. Among the different parts of the system whereconsiderable expense may be saved is the switchinggear, which may be extremely simple at the outset and. Fig. 1. still ample. A small galvanized iron building on awood frame is a thoroughly satisfactory building forthe pioneer substation, which can be replaced by apermanent and fireproof structure when the businesswarrants. By the construction of light, inexpensivetie lines one substation may be arranged to tempo-rarily supply the territory of another, and by the con-struction of a ring system many miles of expensivetransmission line may be replaced by a much lighterclass of construction, which will answer all purposesfor many years. In the greater part of California the conditionsare ideal for long pole spacing. High winds seldomoccur and sleet is unheard of, but it is not uncommonto see a line consisting of three wires ranging in sizefrom No. 2 to No. 8 supported by poles spaced from120 ft. to 150 ft. apart. However, on new lines, the fallacy of this mode of construction is apparently beingrealized, and much of the new work looks on
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Keywords: ., bookcentury1800, bookdecade1890, bookidjo, booksubjectelectricity
