Відгуки відвідувачів - Написати рецензію
Не знайдено жодних рецензій.
Інші видання - Показати все
adapted allowed ampères apparatus appliances approved arranged attached automatic base belt boxes building capacity carried ceiling centre circuit complete concealed conductors conduit connected consist constructed contractor controlled covered cut-out designed desired device direct distance distribution double dynamo efficient electric engines enter entirely equal exciter fastened feeders fixture floor furnish ground heating incandescent inches indicate injury installation insulation Insurance joints junction lamps least length less lights load manner material mechanical metal meter method moisture molding mounted necessary operation outlets pass pipes placed plans plant pole position possible potential pressure prevent proper properly protected Rating regulator resistance riser rules schedule securely separated side single socket specification steam suitable supply supported surface switchboard switches taken taps terminals tion tube unless volts walls waterproof wires
Сторінка 131 - It must be clearly understood that the size of the fuse depends upon the size of the smallest conductor it protects, and not upon the amount of current to be used on the circuit. Below is a table showing the...
Сторінка 122 - Must be so spliced or joined as to be both mechanically and electrically secure without solder. The joints must then be soldered, to insure preservation, and covered with an insulation equal to that on the conductors.
Сторінка 134 - Must be so suspended that the entire weight of the socket and lamp will be borne by knots under the bushing in the socket, and above the point where the cord comes through the ceiling block or rosette, in order that the strain may be taken from the joints and binding screws.
Сторінка 138 - Must be capable of being disconnected at the power plant, or of being divided into sections, so that in case of fire on the railway route, the current may be shut off from the particular section and not interfere with the work of the firemen. This rule also applies to feeders.
Сторінка 134 - The wires used with the fixtures must have a non-inflammable insulation, or, where concealed between the pipe and shell of the fixture, the insulation must be such as required for fixture wiring for the electric light. c. The whole installation must test free from "grounds.
Сторінка 132 - MOTORS — a. Must be wired under the same precautions as with a current of same volume and potential for lighting. The motor and resistance box must be protected by a double-pole cut-out and controlled by a double-pole switch, except in cases where one-quarter horse-power or less is used. The...
Сторінка 122 - Must be so placed that moisture cannot form a cross connection between them, not less than a foot apart, and not in contact with any substance other than their insulating supports.
Сторінка 129 - The object of a tube or conduit is to facilitate the insertion or extraction of the conductors to protect them from mechanical injury and, as far as possible, from moisture.