. The Street railway journal . the wallsufficiently large to permit easy access to its connectionsand bus-bars from behind, and all high-voltage wiring iskept as far as possible from attendants. The engine roomis well lighted and exceptionally clean in appearance andconvenient in arrangement. The power station was builtby F. E. Gilbreth, of Boston. The transmission line between the Plymouth power sta-tion and the Mayflower Grove or Bryantville sub-stationconsists of 13 miles of single three-phase circuit, designedto carry 400 kw at 13,000 volts with 5 per cent loss. Seven-strand No. 2 aluminiu
. The Street railway journal . the wallsufficiently large to permit easy access to its connectionsand bus-bars from behind, and all high-voltage wiring iskept as far as possible from attendants. The engine roomis well lighted and exceptionally clean in appearance andconvenient in arrangement. The power station was builtby F. E. Gilbreth, of Boston. The transmission line between the Plymouth power sta-tion and the Mayflower Grove or Bryantville sub-stationconsists of 13 miles of single three-phase circuit, designedto carry 400 kw at 13,000 volts with 5 per cent loss. Seven-strand No. 2 aluminium wires furnished by the PittsburghReduction Company are used, with a conductivity of 61 percent, equivalent in resistance to No. 4 copper. The lineruns on the highway for miles and on its own privateright of way the remaining distance. Separate poles areused on the right of way, the regular railway poles beingstrung with the high-voltage circuit on the highway, thewires beins on cross-arms above the direct-current feeders. TRACK OPPOSITE MAYFLOWER GROVE and telephone wires. The full-load current is 18 ampsper phase. The town regulations called for insulation onthe high-tension circuit conductors, double-braid water-proof covering being put on. The wire weighs 488 lbs. permile. Poles in the open are of chestnut, 30 ft. to 55 ft. inlength, with 7-in. tops set 5-J ft. in the ground. The cross-arms carry four locust pins and are of Georgia pine. Wash-ers are used under all lag screws and double cross-arms April 5, 1902.] where the deflection is over 2^ degs. to 3 degs. at highwayand railroad crossings. The line is transposed every halfmile, one wire dropping to a lower cross-arm for a singlepole while passing beneath the others. Locke No. 3 choco-late porcelain insulators are installed, weighing 3 lbs. eachand guaranteed to 20,000 volts. Ties are made by two insulated aluminium wires 18 ins. long. Head and sideguys of No. 4 or seven-strand No. 12 iron wire are used inall
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
