Зображення сторінки
PDF
ePub

sion of Lamps.

(All) lamps shall be suspended with 159. Suspen flexible cord pendants from double-pole

ceiling cut-outs, the average length of the

pendants to be.

to furnish all necessary

This contractor is

cord, ceiling

cut-outs and socket bushings. In both cut-outs and sockets the cord shall be knotted so that no weight shall come on the binding screws.

(See p. 101, sec. 100.)

(See p. 101, sec. 101.)

(See p. 102, sec. 102.)

(See p. 102, sec. 103.)

(May require slight modification.)

(See p. 103, sec. 104.)

(May require slight modification.)

[blocks in formation]

165. Franchises and Permits.

POLE LINES.

Low Potential-Direct-Current System-
Two or Three-Wire.

(The purchaser) shall secure all franchises, rights of way, and permits from the authorities and abutting propertyowners for the erection and guying of poles and stringing of wires along the routes on the map hereto attached and made a part of this specification, shall make all necessary arrangements with companies already having pole lines on any part of the same route for crossing, raising, lowering or otherwise moving their wires, and for using, moving or changing their poles, cross-arms, etc.; shall do all necessary trimming of trees; and in every reasonable way shall secure and furnish facilities for the uninterrupted continuance of the work to its completion.

of Circuits.

The lights shall be supplied by circuits 166. Division divided as follows:

etc.

167. Point of

All circuits shall be controlled by Control. switches placed (location.)

The pole line shall be composed of 168. Poles. straight, select, shaved poles, sound

and free from shakes, checks or large knots; poles subject to extra strain shall be specially selected and of ample strength to bear the strain.

of their

169. Setting and Guying.

All poles must be set length in the ground and solidly tamped, must measure not less than

in

diameter at the top, and the distance from the ground line to the lowest cross-arm shall be not less than. Corner, terminal and other poles subject to extra strain shall be securely guyed wherever possible; where impossible to guy them they shall be set with such rake and to such extra depth that the strain shall not pull them beyond the vertical position,

170. Distances,

171. Painting.

172. Gains and Cross-Arms.

allowance being made for the action of water and frost.

No two consecutive poles shall be set at a greater distance apart than

cept by special permission from

ex

[ocr errors]

and all poles carrying heavy feeders or mains shall be set not more than apart.

(As desired.)

Gains shall be carefully cut so that the cross-arms make a snug fit and stand at right angles to the pole.

Cross-arms shall be of —

thoroughly

seasoned, sound and free from large knots; painted ; the vertical distance between cross-arms shall not be less than

Double cross-arms must be placed on terminal poles and corner poles carrying wires larger than J B. & S. B. W. G.

At all corners making an angle greater two sets of cross-arms shall be

than

used placed at the proper angle to each other.

Pins shall be of selected

shall fit 173. Pins and

closely in the cross-arms and be nailed in place.

Insulators shall be of glass, pattern, and of a size suitable for the wire they are to hold.

Insulators.

All poles on which cut-outs are placed 174. Steps. shall be stepped.

(Note.--Specify character of soil, as 175. Soil. loam, sand, etc.; also whether rock, marsh land, quicksands, etc., requiring special work.)

All feeder, main and pressure wires 176. Wiring. of bare copper wire; all serv

shall be

insulated with

ice wires shall be insulated with

All wires shall be so handled as to avoid kinking; wagons, drays, etc., shall not be allowed to drive over them; they

« НазадПродовжити »