Module 11 practice test
Which of the following must NEVER be used as a grounding electrode?
a metal underground gas pipe system
a feeder is used to feed
a subpanel from the main service panel
a grounding electrode conductor must be
made of copper, aluminium, copper-clad aluminum.
In a panelboard, the black circuit conductor in a lighting circuit is connected to a(n)
overcurrent protection device
One of the advantages of electric heat is that
Initial installation costs are less than other types of systems
The NEC article that provides rules for demand factors is
NEC Article 220
The NEC lists requirements for installing service disconnects is ?
NEC article 230
The NEC article that covers equipment grounding and equipment grounding conductors is?
NEC article 250
The NEC article that covers the installation of pools and spas is
NEC article 680
Low voltage system wiring is covered in
NEC article 725
an example of a location in a dwelling where a receptacle must have GFCI protection
garage
Listed FMC may be used as an equipment grounding conductor if the circuit conductors are protected by overcurrent devices rated at ______
20A or less
a residence with a 1,000 square feet of living space has a general lighting load of ?
3,000 VA
Applying the correct demand factors, the net general load for the residence in figure 1 is?
3,210VA
The NEC general lighting load for the home in Figure 1 is?
3,600VA
the minimum clearance in a service drop conductor over a residential driveway is reduced to 12' (3.7m) when the voltage is limited to?
300V to ground
Cables routed through bored holes in framing members must maintain a distance from the nearest edge of not less than ______.
1 1/4'' (32cm)
The square footage of living space in the home in Figure 1 is?
1,200 ft squared
The NEC allows the load calculation for the grounded neutral conductor supplying electric ranges and dryers to have a demand factor of?
70%
a current imbalance as low as 4 milliamps may be detected by a(n)
GFCI sensor
a type of cable with a corrugated sheath that has a maximum bend radius of 7 times the cable diameter is...
Type MC
Romex is another name for?
Type NM cable
Power to the entire residence is shut of at the main service disconnect located _______.
at the panel board
The conductors that extend from the panelboard to various outlets are called _____.
branch circuits
a GFCI sensor will trip when
current in the neutral load is less then current in the hot load.
In residential construction, conduit is most likely to be used where conductors are
embedded in concrete
The green screw on a receptacle connects to the
equipment grounding conductor
the main bonding jumper is located at the
service disconnect
a switch used to control one or more lamps from two different locations is called a(n)
three-way switch
According to the NEC, the small appliance loads in each kitchen area of dwelling must be served by at least?
two 120V, 20A small branch circuits