When installing units requiring three phase power, what is one of the concerns with the three phase installation?
What will be an ideal response?
One important aspect of three phase power is that the phases are within 3% of each other.
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Indicate whether the statement is true or false
Fearing a return of political extremism, fragile western European democracies turned to whom for support and protection?
a. Great Britain b. France c. the United States d. the Soviet Union
Transformers in which the primary and secondary voltages are 180 degrees out of phase are known as _____.
a. unlike-wound transformers b. like-wound transformers c. unequal transformers d. step-up transformers
Which type of duct undergoes more rigorous testing before it is labeled?
A) Polycarbonate molded duct B) Galvanized sheet metal duct C) Flexible duct D) Flexible duct connector