NEC
The minimum cover requirement for underground feeder and branch circuit Type UF cable used as a 30 amp feeder under a driveway for a 2 family dwelling
18 in. Art. 300.5 (A)
Table 300.5
EMF and CEMF are _____ degrees out of phase with each other
A. 90 degrees
B. 180 degrees
C. 270 degrees
D. 360 degrees
B. 180 degrees
Capacitance is measured in _______.
Farads
A major short circuit or ground fault at the main service panel or meter socket panel is called ___.
Arc Flash
Equipment that is constructed so that moisture will not enter the enclosure under specified test conditions would be classified as ______.
Watertight
Type NM cable with a 1/2 in. diameter shall be installed so that the inner edge of any bend is not less than:
2 1/2 inches. 334.24
Inductors are measured in _______.
Henries
Capacitors ______ electrical charge
Store
NFPA 70 E considers conductors not electrically safe until:
A. All sources of energy are removed
B. LOTO at disconnecting means
C. Absence of voltage is verified by an approved meter
D. All the above
D. All the above
Conductors and equipment required or permitted by this code shall be acceptable only if_____.
A. Listed
B. Certified
C. Approved
D. Documented
C. Approved
Insulated conductors for non-metallic sheathed (Type NM) cable shall be rated at:
A. 140 degrees F
B. 167 degrees F
C. 194 degrees F
D. 120 degrees F
C. 194 degrees F
Art. 334.112
Current _______ voltage in an inductive circuit.
A. Lags
B. Leads
A. Lags
The insulating material in a capacitor is called____.
The dielectric
OSHA recognizes these as the 4 main types of electrical injuries
Electrical Shock
Electrocution
Burns
Falls
NEC Table 8 of Chapter 9 may be used to find the ___ of a conductor.
Resistance
A small appliance branch circuit in a dwelling shall comply with which of the following?
A. Have no lighting outlets supplied to it
B. limited to 4 outlets and 4 lights
C. Have 15A OCPD
D. Be permitted in the living room
A. Have no lighting outlets supplied by it.
Art. 210 (C)(1) and 210.52 (B)(1)
Total opposition to the AC circuit is called_____.
Impedance
In a purely capacitive circuit, current can only flow during the time the capacitor is___.
Charging or discharging
Who is mainly responsible for Safety
YOU
Heat generated internally in a conductor is the direct result of load____.
A. Current
B. Resistance
C. Voltage
D. Wattage
A. Current
Equipment grounding conductors are permitted to be any of the following EXCEPT:
A. Stranded bare wire
B. Bare circular busbar
C. A surface metal raceway listed for grounding
D. 6 1/2' of listed flexible metal conduit
D. 6 1/2' of listed flexible metal conduit.
Art. 250.118 (5)(d)
The formula to find Inductive Reactance is_____
X(L)= 2(3.14)FL
One time constant is the amount of time it takes for a capacitor to_____% of the time left to reach its full charge.
63.2%
What does the letters NFPA stand for?
National Fire Protection Agency
Non-metallic sheathed cable wiring is generally used in a _____ location.
Dry