Electric Lighting Specifications for the Use of Engineers and ArchitectsW.J. Johnston Company, 1892 - 176 стор. |
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Сторінка 11
... Electric Light Asso- ciation - 118 Rules of the National Board of Fire Under- writers 140 Rules of the New England Insurance Ex- change 154 1 INTRODUCTION . The following " Specifications " are intended CONTENTS . xi.
... Electric Light Asso- ciation - 118 Rules of the National Board of Fire Under- writers 140 Rules of the New England Insurance Ex- change 154 1 INTRODUCTION . The following " Specifications " are intended CONTENTS . xi.
Сторінка 13
... electrical installations of the National Electric Light Association , the National Board of Fire Underwriters , and the New England Insurance Exchange . These Rules and Regulations being practically standard all over the country and ...
... electrical installations of the National Electric Light Association , the National Board of Fire Underwriters , and the New England Insurance Exchange . These Rules and Regulations being practically standard all over the country and ...
Сторінка 14
... electric light plants must be installed to meet the varied requirements arising from the diversity of their application are so numerous that many of them it is impossible even to mention in a general specification . Though it is ex ...
... electric light plants must be installed to meet the varied requirements arising from the diversity of their application are so numerous that many of them it is impossible even to mention in a general specification . Though it is ex ...
Сторінка 18
... lights and projectors will be determined by local con- ditions . Permanent signal lights should be provided with a duplicate light , which is auto- matically switched into circuit when the first lamp fails and gives a signal calling ...
... lights and projectors will be determined by local con- ditions . Permanent signal lights should be provided with a duplicate light , which is auto- matically switched into circuit when the first lamp fails and gives a signal calling ...
Сторінка 19
... lamps that will be lighted at one time , the length of time of maxi- mum load , the length of time of light load , the day load , possibilities of extension , etc .; the sizes of the units being such as to have as near the maximum load ...
... lamps that will be lighted at one time , the length of time of maxi- mum load , the length of time of light load , the day load , possibilities of extension , etc .; the sizes of the units being such as to have as near the maximum load ...
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Alternating Current ampère meter ance apparatus appliances approved arc lamps armature attached automatic baseframe bids building c. p. lamps candle power capacity carried ceiling centre of distribution circuit cleats complete concealed conductors conduit connections contractor shall furnish covered cross-arms cuits cut-outs and switches device Direct Current double-pole efficient electric light engineer erect the following exciter fastened fixture floor foundation(s full load fuses galvanometer ground hand regulator incandescent lamps inches inclosed incombustible bases installation insulation joints junction boxes knife switch least lightning arresters Low Potential lug or set main wires ments metal moisture moisture-proof molding necessary non-combustible number of lights number or designation operation outlets placed plant porcelain proper protected pulleys purchaser Rating Risers Feeders schedule securely set screws shunt Sockets soldered spark arresters specification spirit and intent steam switchboard tests three-wire tightened tion tube two-wire voltmeter volts walls waterproof wire smaller
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Сторінка 128 - Must be so placed in wet places that an air space will be left between conductors and pipes in crossing, and the former must be run in such a way that they cannot come in contact with the pipe accidentally. Wires should be run over, rather than under, pipes upon which moisture is likely to gather or which, by leaking, might cause trouble on a circuit.
Сторінка 124 - Must be provided with reliable stops to prevent carbons from falling out in case the clamps become loose.
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 - When current for light and power is taken from primary or secondary batteries, the same general regulations must be observed as apply to similar apparatus fed from dynamo generators developing the same difference of potential.
Сторінка 137 - 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...
Сторінка 120 - All multiple arc low potential systems (300 volts or less) must be provided with an indicating or detecting device, readily attachable, to afford easy means of testing where the station operates continuously. c. Data obtained from all tests must be preserved for examination by insurance inspectors.
Сторінка 121 - Service blocks must be covered over their entire surface with at least two coats of waterproof paint. c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached.
Сторінка 132 - ... b. Must always be placed in dry, accessible places, and be grouped as far as possible. Knife switches must be so placed that gravity will tend to open : rather than close the switch.
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.