The distribution transformers used in industrial plants or network substations for three-wire secondary systems are usually mounted on poles or in ____________________.
Fill in the blank(s) with the appropriate word(s).
transformer vaults
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Which of the following wire colors would indicate a hot conductor?
a. green b. yellow c. white d. black
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Asbestos is no longer used in the USA.
Answer the following statement true (T) or false (F)
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Most systems can operate with up to ________ feet of lines and a maximum of ________ feet vertical distance between the indoor and outdoor units
A) 100, 30 B) 75, 15 C) 90, 20 D) 50, 10
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One way that an engineer?s scale differs from an architectural scale is that the engineer?s scale _____.