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223. Painting. (As reqUired.)

224pwtawal Such renewal parts as it is advisable to have on hand shall be furnished, a list of same to be added hereto.

225. summary. (jgee Note: p. 52, sec. 27.)

Each bidder shall fill out completely the following summary:

Number of boilers . . .

Rated horse-power . . . — —

Kind ..... .

Diameter of shell . . .

Length of shell ....

Number of tubes . . .

Diameter of tubes . . .

Heating surface . . .

Tensile strength of steel . .

Working pressure . . .

Testing pressure ... .

Outside dimensions of setting .

Number of condensers . .

Kind .....

Capacity of each . . .

Number of pumps . . .

Kind ..... —

Capacity of each . . . —

Number of heaters . . . —

Kind .....

Capacity of each . . .

RULES AND REQUIREMENTS

• OF THE

NATIONAL BOARD OF FIRE UNDERWRITERS FOR THE INSTALLATION OF WIRING AND APPARATUS FOR ELECTRIC LIGHT AND POWER AS RECOMMENDED BY THE UNDERWBITERS' NATIONAL ELECTRIC ASSOCIATION.

EDITION OF JAN. 1, 1895.

The use of wire ways for rendering concealed wiring permanently accessible, is most heartily endorsed and recommended; and this method of accessible concealed construction is advised for general use.

Architects are urged, when drawing plans and specifications, to make provision for the channeling and pocketing of buildings for electric light or power wires, and in specifications for electric gas lighting to require a two-wire circuit, whether the building is to be wired for electric lighting or not, so that no part of the gas fixtures or gas piping be allowed to be used for the gas lighting circuit.

CENTRAL STATIONS.
Class A.

FOR LIGHT OR POWER.

These Rules also apply to Dynamo Rooms in Isolated Plants, connected with, or detached from buildings used for other purposes; also to all varieties of apparatus therein of both high and low potential.

1. Generators:

a. Must be located in a dry place.

b. Must be insulated on floors or base-frames, which must be kept filled, to prevent absorption of moisture, and also kept clean and dry.

c. Must never be placed in a room where any hazardous process is carried on, more in places where they would be exposed to inflammable gases, or flyings, or combustible material.

d. Must each be provided with a waterproof covering.

2. Care And Attendance:

A competent man must be kept on duty in the room where generators are operating.

Oily waste must be kept in approved metal cans, and removed daily. (See Definitions). 3. Conductors:

From generators, switchboards, rheostats, or other instruments, and thence to outside lines, conductors—

a. Must be in plain sight, and readily accessible.

b. Must be wholly on non-combustible insulators, such as glass or porcelain.

c. Must be separated from contact with floors, partitions or walls, through which they may pass, by non-combustible insulating tubes, such as glass or porcelain.

d. Must be kept rigidly so far apart that they cannot come in contact.

e. Must be covered with non-inflammable insulating material sufficient to prevent accidental contact, except that "bus bars" may be made of bare metal.

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