MASTER OPENBOOK EXAM #11

Where Nm cable or underground feeder and branch circuit cable is used boxes not larger than a nominal size 2 1/4” x 4” mounted in walls and where the cable is fastened within ___ inches of the box measures along the sheath and where the sheath extend into the box not less than 1/4”, securing the cable to the box shall not be required.

• 8

• 10

• 12

• 24

A bare copper conductor can be used in an underground service ___.

• where judged suitable for soil conditions

• where used in raceway

• without regard to soil conditions where part of cable assembly identified or underground use

• all of the above

The grounding conductor for communication circuit shall be connected to the ___.

I. metallic power raceway   II. service equipment enclosure  III. building electrode system

• I only

• II only

• II or III only

• I, II or III

“Direct grade level access” is defined as being located not more than ___ above grade level.

• 6 1/2’

• 6’ 3”

• 6’ 4”

• 8’

A main bonding jumper shall be a ___.

I. wire                   II. screw               III. bus

• I only

• I or II only

• I or III only

• I, II or III

The earth shall not be used as the sole ___ conductor.

• equipment grounding

• grounded

• neutral

• bonding

Each receptacle of DC plugging boxes shall berated at not less than ___ amps.

• 15

• 20

• 25

• 30

A protective layer which is installed between the floor and type FCC flat conductor cable to  protect the cable from physical damage and may or may not be incorporates as an integral part of the cable is the ___.

• transition assembly

• outer sheath

• bottom shield

• header

An area must be classed as a Class II hazardous location if it contains ___.

• combustible dust

• ignitable vapors

• flammable gases

• ignitable fibers

The minimum headroom requirement of 6’ 6” for service equipment in an existing dwelling unit is not required if the service equipment or panelboard does not exceed ___ amps.

• 100

• 200

• 300

• 400