Michigan Practice Exam 2017 Flashcards
There are 6 conductors in a raceway connected to 75 degree C rated circuit breaker. Each wire has a 70 amp load using THHN. The minimum size conductors used are ________ AWG.
4 AWG
310.15(B)(16), 310.15(B)(3)(a)
Thermal insulation shall not be installed within ________ inches of recessed lighting fixtures.
3 inches
410.116(B)
A 1” conduit contains three 3-wire circuits or a phase system. All conductors are #10TW. Each circuit consists of two-phase conductors and one grounded conductor and one equipment grounding conductor. The max ampacity of each phase conductor is _____________?
24 amps
The volt/ampere rating of a device that consumes 14.5 amperes on a 240 circuit is _________?
3,480
VOLTS X AMPERE = VA
A 208 volt, 3 phase heater draws 3,598 watts. How many amperes does the heater draw?
10 Amps
P=Ex1.73/I
3598=208x1.73/I
I=3598/359.84
A pool underwater light fixture shall be installed at least _________ inches below the water level?
18 inches
680.23(A)(5)
A pools general-purpose receptacle shall not be installed less than ________ feet from inside wall of the pool.
6 feet
680.22(A)(1)
The junction box for the 120 volt wet-niche fixture shall be at least?
4 inches
680.24(A)(2)(a)
A metal fence installed with-in _______ feet of the pool shall be bonded.
5 feet
680.26(B)(7)
The feed to the wet-niche fixture shall be installed in _________ if installed in metal conduit.
Brass
680.23(B)(2)
A 15 or 20 amp receptacle shall be located with-in ________ feet of a roof top air conditioner?
25 feet, on the same level
210.63
The maximum over current protection for 8 current carrying #12 THHN conductors in a 1/2”EMTconduit is ________ amps.
20 amps
An AC system of 50 to 1,000 volts shall be grounded if maximum voltage to ground does not exceed _______ volts.
150 Volts
250.20(B)(1)
Type “S” adapters are installed in Edison base fuse holders to _________.
To limit the size of the fuse installed.
240.53(B)
A laundry branch circuit shall be rated at ________ amps.
20 amps
210.11(c)(2)
In a commercial building the minimum size ungrounded service entrance conductor for 120/240 volt 1 phase 200 amp service is __________.
3/0
310.15(B)(2)(a)
The minimum service for a one family dwelling shall be ___________.
100 amps
230.79(C)
Type _______ cable is not permitted for service entrance conductors.
UF
340.12(a)
A motor rated 4750 watts, 208 volt 3 phase draws _______ amps.
13.2amps
I=P/Ex1.73
Direct burial cables emerging from the ground and subject to physical damage shall be installed in
Schedule 80 PVC
300.5(D)(1-4)
A high impedance grounded system is limited to systems operating as ______ volts or above.
480 volts
250.36
An expansion joint is required for nonmetallic conduit when the temperature changes from r -15 degree to 105 degree Fahrenheit, the thermal expansion for 100 feet or rigid nonmetallic conduit is ________ inches.
4.87 inches
Table 352.44
under 120 degree difference
The voltage rating of communication cables shall not be less then _______ volts.
300 volts
800.179
The direction of rotation of a 3 phase motor can be reversed by interchanging any ______ lead.
2 leads.
A _______ receptacle may be included on the small appliance branch circuit.
Electric clock or lighting on a gas range
210.52(B)(2) Exp 1 & 2
A light fixture that weights more than _______ pounds shall be supported independently of the fixture junction box.
50 lbs
314.27 (A)(2)
Disconnecting means shall be provide on the supply side of all cartridge fuses of any voltage where?
Accessible to other than qualified persons
240.40
Furnaces shall be supplied by a _______ branch circuit.
Individual
422.12
A screw connecting the neutral bar or a grounded system to the service equipment enclosure is called _______
Main bonding jumper
250.28(B)
The minimum size rigid metal conduit for a commercial service rated for 150 amps 120/240 volt 3-wire single phase, using THWN wire is ______?
1.5
Chapter 9 tables 4 and 5
Round boxes shall not be used where conduits or connectors fasten to the _______ of the box.
