Codes, Standards and Practices 5

Services exceeding 1000 volts nominal are covered by Part VIII of Article 230. Which other parts of Article 230 also cover services exceeding 1000 volts nominal where applicable?

• Part I, General

• Part V, Service Equipment, General

• All other parts

• No other parts

A fuse rated in continuous amperes not to exceed   ?   times the ampacity of the conductor, or a circuit breaker with a trip setting of not more than   ?   times the ampacity of the conductors, shall be considered as providing the required short-circuit protection for service entrance conductors which operate at over 1000 volts, nominal.

• three / three

• three / six

• six / three

• six / six

Answer explanation

230.208

A ground-fault circuit interrupter is generally required to be installed to protect luminaires, submersible pumps, and other submersible equipment installed in permanently installed fountains in accordance with requirements in Part   ?   of Article 680.

• III

• IV

• V

• VI

Answer explanation

230.202(B), Table 300.50

What is the minimum cover requirements for Type USE, direct-buried cables which operate at 24 kilovolts? The cables are installed without concrete protection or encasement on commercial property not subject to vehicular traffic.

• 18"

• 24"

• 36"

• 42"

Answer explanation

680.51(A)

Pool associated motors shall be permitted to employ cord-and-plug connections. The flexible cord shall not exceed   ?   in length.

• 3'

• 4'

• 5'

• 6'

Answer explanation

680.21(A)(3)

Where a permanently installed pool is installed, no fewer than one 125-volt, 15- or 20-ampere receptacle on a general-purpose branch circuit shall be located not less than   ?   from, and not more than   ?   from, the inside wall of the pool.

• 6' / 10'

• 6' / 15'

• 6' / 20'

• 6' / 25'

Answer explanation

680.22(A)(1)

In locations such as assembly occupancies and theaters, a   ?   for controlling emergency lighting systems shall be located in the lobby or at a place conveniently accessible thereto.

• key

• relay

• schedule

• switch

Answer explanation

700.21

For the installation of underground conduits and cables rated over 1,000 volts, there is a General Note to Table 300.50 for installations in industrial establishments. This note allows a   ?   reduction in the cover requirements for each two inches of concrete placed over the underground installation for all installations except RMC and IMC.

• 3"

• 4"

• 5"

• 6"

Answer explanation

Table 300.50, General Note 3

Where direct-buried cables, rated over 1,000 volts nominal, are installed in accordance with Table 300.50, their location shall be identified by a warning ribbon that is placed in the trench at least   ?   above the cables.

• 6"

• 8"

• 12"

• 18"

Answer explanation

Table 300.50, Specific Footnote b

Insulated conductors and cables rated for over 1,000 volts, nominal, installed in underground raceways, shall be   ?   for use in a wet location and shall comply with Section 310.10(C).

• approved

• identified

• labeled

• listed

Answer explanation

300.50(B)