Identifier: cyclopediaofappl05amer (find matches)
Title: Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc.
Year: 1916 (1910s)
Authors: American Technical Society
Subjects: Electric engineering
Publisher: Chicago : American Technical Society
Contributing Library: Northeastern University, Snell Library
Digitizing Sponsor: Northeastern University, Snell Library

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of seat, unless under side ofseat is protected by not less than \ inch fire-resisting insulating material,or .04 inch sheet metal with 1 inch air space over same, when the dis-tance may be reduced to 3 inches. Truss plank heaters to be mounted on not less than \ inch fire-resisting insulating material, the legs or supports for the heaters provid-ing an air space of not less than^ inch between the back of the heaterand the insulating material. (3) Circuits to be run in approved metal conduit, or in approvedmolding, or if the location of conductors is such as will permit an airspace of not less than 2 inches on all sides except from the surface wiredover, they may be supported on porcelain knobs or cleats, provided theknobs or cleats are mounted on not less than \ inch fire-resisting insu-lating material extending at least 3 inches beyond conductors at eitherside, the supports raising the conductors not less than ^ inch from thesurface wired over, and being not over 12 inches apart. 218
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<oPi oo H s ^^^1 a*gl > 2 i> O s> U 2 O ■K ^ § O1/1 a, ELECTRIC RAILWAYS 123 (h) Air Pump Motor and Circuits (1) Circuits to be run in approved metal conduit or in approvedmolding, except that when run below the floor of the car they may besupported on porcelain knobs or cleats, provided the supports raise theconductor at least ; inch from the surface wired over and are not over12 inches apart. (2) Automatic control to be enclosed in approved metal boxAir pump and motor, when enclosed, to be in approved metal box or awooden box lined with metal of not less than ^ inch in thickness. When conductors are run in metal conduit the boxes surroundingautomatic control and air pump and motor may serve as outlet boxes,(i) Main Motor Circuits and Devices (1) Conductors connecting between trolley stand and main cut-out or circuit breakers in hood to be protected where wires enter carto prevent ingress of moisture. (2) Conductor

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