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(See p. 94, sec. 83.) "nVi iffi8

(Seep. 94, sec. 84.) 119- 8ystem

(See p. 94, sec. 85.) 12i°n

All single conductors shall be insulated 121 ttJSfula"

with . All duplex conductors shall

be insulated with . Duplex conductors and all single conductors larger

than | g'G j- shall be

stranded.

(See p. 95, sec. 87.) 122. insuia

v ft tion Resist

ance.

From the switchboard (or centre of dis- ^J^f

(risers )

tribution) < groups of risers > shall

( feeders )

be carried to the following points:

{ Riser ) ( riser] )

1 Group V No. 1 to , ■< group V No.

( Feeder ) ( feeder )

2 to , etc.

Every conductor in each

(riser, )

-; groups of risers, >- and main shall be
(feeder, )

provided with an independent tube.
(Riser )

< Group >- No. 1 shall feed all lights (lo

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{riser )

cation), < group j-No. 2 shall feed, etc.

^ From the j ribution f the

( Risers ) 1' Feeders . I TISCTS^ | be carried to and

thence upward in (channels, elevator shaft, etc., with location) to their respective junction boxes.

125. Mains (if From the \ [- junction boxes,

taps terrain- j leeuer I 0'

ate in sec- .-in

tinonaboies"c'mams sna^ ®e carried to secondary junction boxes where all tap lines shall centre.

From j TMeder fNo- 1 shall be carried mains terminating at ;from

| feeder f No- 2, etc

(Note.—In certain cases it is advisable to run the circuits in such a manner that no room shall be dependent on one circuit only; if so desired, it should be added under this heading.)

From the -< feeder >• junction boxes dis

, tributing circuits shall be run to the various outlets as specified in the schedule and located on the plans. For all taps duplex conductor requiring but one tube may be employed provided the current required does not exceed amperes.

mains and taps shall be brought together in junction boxes at the points designated in this specification and on the plans [and connected with their respective cut-outs and switches; (unless the wiring contractor does not furnish cut-outs and switches, in which case add, in such a way as to permit the easy and convenient insertion of the cut-outs and switches specified.)].

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128. cut-outs. (See p. 99, sec. 94.)

129. Fuses. (See p. 99, sec. 95.)

130. switches. (See p. 99, sec. 96.)

13sup^fteure Where no gas pipe or other support for the fixture exists, the special form of terminal box designed to furnish such support shall be employed and shall be substantially fixed to a suitable foundation in the ceiling or wall.

^Tube's680' All tubes shall be of sufficient size to allow the wires to be readily drawn in, withdrawn and reinserted at will.

133. Fasten- Tubes, whether concealed or on the

ings.

surface, should be held in place by the fastenings especially designed for use with this conduit.

134. joints. The tubes shall be cut squarely, reamed

out smoothly, and the ends joined by the use of the coupling designed for that purpose.

Where more than three elbows are un- Limitations! avoidable an intersection box shall be inserted to relieve both the wires and the tubes of strain when the wires are being drawn in.

All tubes shall emerge at outlets in 136- outlets, terminal boxes leaving the outlets so protected as not to be injured by the plasterers.

To guard against mechanical injury and ^ork *l°\°h the destructive action of cement all floor armored

Conduit

conduits shall be made of double tube, one telescoped within the other, and both the outer and inner tubes joined in the usual manner. The outer tube shall, in the case of contact with cement, be alkali proof. As a further protection floor tubes shall be covered, during construction, with a light board. Such other precautions shall be taken to insure the safety of the tubes as the character of the building and work require.

Each side of circuits carrying more than ^onBSSl

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