1. All metal enclosures for service conductors and equipment must be:

• Grounded

• Ungrounded

• Made from 10 gauge steel or above

• PVC (plastic)

2. On a switchboard with busbars, phase B would have the highest voltage to ground in a:

• Delta-Wye system

• High-leg delta-connected system

• Wye-Wye system

• Scott connection

3. A 200-ampere panelboard may supply a maximum load of:

• 100 amperes

• 180 amperes

• 160 amperes

• 200 amperes

4. Which of the following is not a requirement for an intersystem bonding termination?

• Consists of at least three terminals

• Contains at least 50 percent bronze or brass

• It be accessible for connection and inspection

• It be listed for grounding and bonding

5. Branch circuit conductors supplying information technology equipment shall have an ampacity of:

• 20 amperes maximum

• 25 amperes minimum

• 250 percent of the computed load

• 125 percent of the connected load

6. What is the maximum number of overcurrent devices permitted in a panelboard?

• 40

• No fewer than the maximum busbar rating after all correction factors have been applied

• As many as will fit

• More than 42 requires that a permanent label be affixed to the deadfront

7. Insulated grounded conductors, in sizes larger than No. 6 AWG, may be identified by:

• Continuous white or natural gray outer finish

• Three continuous white stripes on other than green insulation

• Distinctive white markings encircling the conductor at its terminations

• All of the above

8. The minimum size copper equipment grounding conductor for a 200-ampere circuit is:

• No. 3 AWG

• No. 6 AWG

• No. 8 AWG

• No. 10 AWG

9. Auxiliary gutters must not be filled to greater than:

• 20%

• 30%

• 40%

• 50%

10. The working clearance between live parts for a system operating at 480 volts with exposed live parts on one side and grounded parts on the other side is:

• 1 foot

• 2 feet

• 3 feet 6 inches

• 4 feet