1. What must be the middle conductor in a single - phase , three - wire electrical system :
a . Ungrounded
b Grounded
c . Hot
d . Out - of - phase . - ANSWERB
2. Three - wire , single phase electrical systems require 120 volts between the ungrounded conductor and the neutral . Which volt...
1. What must be the middle conductor in a single - phase , three - wire electrical system :
a . Ungrounded
b Grounded
c . Hot
d . Out - of - phase . - ANSWERB
2. Three - wire , single phase electrical systems require 120 volts between the ungrounded conductor
and the neutral . Which voltage must exist between the two ungrounded conductors ?
a. 120 volts
b . 240 volts
c . 288 volts
d 600 volts - ANSWERB
3. When there are three wires in a single - phase 3 - wire electrical system , the hot conductors are
known as :
a . Neutral conductors
b Grounded conductors
c . Nominal conductors
d . Ungrounded conductors - ANSWERD
4. The local utility company supplies a 120/240 volt single phase electrical system to a one - family
dwelling with a demand load of 200 amps To be used as service entrance conductors for this
residence , what minimum aluminum THW conductor is required ?
a . 1/0 AWG
b . 4/0 AWG
c . 3/0 AWG
d . 2/0 AWG - ANSWERB
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