Which of the following electrical systems is not likely to require a ground detector?
A. 480Y/277-volt, 3-phase, 3-wire, wye-connected
B. 480Y/277-volt, 3-phase, 4-wire, wye-connected
C. 600Y/346-volt, 3-phase, 3-wire, wye-connected
D. 480-volt, 3-phase, 3-wire, delta-connected
B. 480Y/277-volt, 3-phase, 4-wire, wye-connected
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Decimal fractions are added and subtracted just like whole numbers as long as the decimal points are kept in a vertical line.
Answer the following statement true (T) or false (F)
Portable on-stage switchboards must be equipped with a pilot light and must be supplied by an individual branch circuit rated at _____.
a. 15A or less b. 20A or less c. 30A or less d. 50A or less
The Black Codes provided for all of the following EXCEPT
A. a ban on jury service by blacks. B. a restriction against black migration from the South. C. a bar on blacks from renting land. D. punishment of blacks for idleness. E. fines for blacks who jumped labor contracts.
The electric furnace uses an electronic type direct spark ignition
Indicate whether the statement is true or false