1. Portability: Electric motors are not very portable; they must be connected to a source of electricity. Advances in battery design have reduced this disadvantage for fractional horsepower DC motors, but AC motors must be connected to a source of alternating current.
2. Electrical hazard: Electricity has an adverse effect on humans and other animals when they come into contact with it. With the large number of motors used in agriculture and the tendency for the environment of agricultural structures to be wetter and dustier than residences, there is a greater electrical hazard associated with the use of electrical motors in agricultural buildings.
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