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SOURCES OF SUPPLY 
German manufacturers, through their branch houses and agents 
who carry large stock, obtain the largest share of the trade in motors 
in the Netherland East Indies. Over one-half (2,545) of the total of 
4,884 motors imported in 1928 were supplied by German firms. 
Dutch manufacturers supplied the next largest number (1,514). 
Imports of American motors during that year amounted to about 3 
per cent of the total number, or 133. Government purchases of 
motors were largely from Dutch firms. 
Although the United States has, in the past, supplied some of the 
largest motors in use in the Netherland East Indies, imports at present 
are confined chiefly to sizes under 25 horsepower, and fractional 
horsepower motors. The United States obtains most of the trade in 
fractional-horsepower motors, since they are used largely as replace- 
ments in the American electric household appliances that have been 
imported into the territory. 
MOTOR-CONTROL EQUIPMENT 
The present regulations in force in the Netherland East Indies 
provide that motors of over 1-kilowatt axle capacity (1.34 horsepower) 
and not more than 2-kilowatt axle capacity (2.68 horsepower), used 
for intermittent operation and having a short-circuit rotor, must be 
started with a starting resistance in the stator or a star-delta switch 
which meets the approval of the electricity service. Motors with a 
larger axle capacity than 3 kilowatts must either be provided with a 
slip-ring armature and be started by means of a starting resistance 
in the rotor circuit or if with a short-circuit rotor be started with a 
starting transformer in the stator. An ampere meter is required in 
one of the phase circuits of motors of more than 10-kilowatt axle 
capacity. The Government factory safety-inspection service favors 
iron-clad starters, but they are not absolutely essential. 
The use of the star-delta switch with six leads practically eliminates 
the use of American squirrel-cage motors unless they are equipped 
with the proper starting equipment. 
Automatic no-voltage releases are not at present insisted upon, but 
it is likely that the new “factory safety ordinance” that is now being 
drawn up will provide for their use. 
MOTOR-INSTALLATION REGULATIONS 
The following regulations governing the installation of motors were 
published in 1923. They are still in force although under revision 
by a committee appointed to draw up new rules. 
1. Motors must comply with the “Standardization Rules of the American 
Institute of Electrical Engineers’ or Die Normalen fiir Bewertung and Prifung 
von Electrischen Maschinen und Transformatoren des Verbandes Deutscher 
Electrotechniker,” but the motor must, except in special cases, be built for an 
atmospheric temperature of 40° C. and be provided with protective insulation 
against moisture, and the name plate must indicate the power factor under 
highest tension. . 
2. Except for deviations in special cases, as for inclosed motors or crane motors, 
to be decided by the electricity service, the power factor for polyphase-current