NEC Practice 4

Wiring of two or more emergency circuits supplied from the same source ___________ in the same raceway, cable, box or cabinet.

• shall be

• shall be permitted

• shall not be permitted

• shall not be

Answer explanation

700.10 (B) (5) (d)

Overhead service conductors shall not be smaller than _______ cu.

• 6

• 10

• 8

• 4

Answer explanation

220.23 (B)

Non-locking 15-20 ampere 125 and 250 volt receptacles shall be listed tamperproof in which of the following locations?

• education facilities

• child care facilities

• dwelling units

• all of these

Answer explanation

406.12

In Category 1 critical care spaces each patient bed location shall be supplied by at least _____ branch circuits from either the critical or normal systems.

• two

• three

• six

• one

Answer explanation

517.19 (A)

Two ground conductors are installed under the same terminal. This installation is __________ .

• permissible

• not permitted

• okay under exceptions

• a violation.

Answer explanation

408.41

The maximum spacing between supports of 3-1/2 inch rigid pvc conduit is _____

• 6 feet

• 7 feet

• 10 feet

• 3 feet

Answer explanation

Table 352.30

Raceways, conductors junctions boxes and other accessories shall be permitted to be color coded ______ in intrinsically safe systems provided no other conductors are used in this color scheme.

• orange

• purple

• violet

• light blue

Answer explanation

504.80 (C)

Given:

6 -No. 12 2 No. 14 2 No. 8 and 1 No. 10 conductors all THHN.

One 3/4 inch emt conduit.

This installation _____ the requirements of the code

• meets

• does not meet

Answer explanation

#12 - .0133
#14 - .0097
#8 - .0366
#10 - .0211

Table 5 ( in Chapter 9 Tables)

6 times .0133, add 2 times .0097, add 2 times .0366, and add .0211, = 1935.

Table 4 (in the Chapter 9 Tables), look up the limit for conductor area for a 3/4 inch EMT (far right column). = 213.

Values for available fault current for use in determining approximate minimum short-circuit current and interrupting ratings of service equipment are available from electric utilities.

• true

• false

Answer explanation

110.24 (A) informational note 2.

SO cord is available in ______ AWG sizes.

• 14-10

• 16-2

• 18-2

• 18-4/0

Answer explanation

Table 400.4