IN ACCORDANCE WITH THE NATIONAL

ELECTRICAL CODE, WITH EXPLANATIONS,

ILLUSTRATIONS AND TABLES NECESSARY

FOR OUTSIDE AND INSIDE WIRING AND CON-

STRUCTION FOR ALL SYSTEMS, TOGETHER

WITH A SECTION ON HOUSE WIRING.

BY

H. C. CUSHING, JR.

Fellow Am. Inst. Elecl. Engrs.

WITH THE CO-OPERATION OF THE NATIONAL ELECTRIC

LIGHT ASSOCIATION COMMITTEE ON WIRING EX-

ISTING BUILDINGS, AND THE SOCIETY FOR

ELECTRICAL DEVELOPMENT.

INDEX TO CONTENTS-PAGE 216

PUBLISHED BY

H. C. CUSHING, JR., PULITZER BLDG., NEW YORK,

U. S. A.

TK3805
C 3

T

PREFACE

HE Author, with the collaboration of Mr. F.
E. Cabot, Chairman of the Electrical Com-
mittee of the National Fire Protection Associa-
tion, and with the co-operation of the National
Electric Light Association Committee on Wiring
Existing Buildings, and the Society for Electrical
Development, has made it his aim in compiling
the following pages to set forth, as clearly as pos-
sible, the essential rules and requirements for
safe and economical exterior and interior wiring
and construction, the object being to standardize,
as much as possible, all work of this nature and to
respectfully suggest to the Electrical Engineer,
Architect, House-owner, Contractor and Wire-
man just what is required by Fire Underwriters
Inspectors throughout the United States.

Copyright, 1915, by A. B. Cushing.

THE GENERATOR

All generators, whether for central station or isolated lighting or power work, should be located in a dry place so situated that the surrounding atmosphere is cool. If the surrounding air is warm it reduces the safe carrying capacity of the machine, and is likely to allow such temperatures to

Proper installation of dynamo or motor on filled wooden base frame. rise in the machine itself as to burn out either

armature or field, or both. A generator should not be installed in any place where any hazardous process is carried on, nor in places where they would be exposed to inflammable gases or flying combustible materials, as the liability of occasional sparks from the commutator or brushes might cause more or less serious explosions.