copyright 2005 ted "smitty" smith practice code look up two minute drill #6

Practice Code Look Up

Two Minute Drill #6

Directions• Left click on the presentation ICON located at the

bottom of the slide directory to the left of the this slide.

• Each slide will transition to the correct answer automatically in 2:00 minutes. The correct answer will transition in 5 seconds.

• Do not worry about writing down the correct answer for now. You will have the opportunity to do that at the end of the two minute drill

• Good luck

Further More• You have seen all of these questions before.

This time the slides will transition at different rates of speed. Remember do not worry about writing down the right answer for now. When you reach the end all of the slides will be repeated without the timer so you can take your time to find the ones you missed and write down the correct answers then.

Raceways• LFMC shall be securely fastened in place by

an approved means with in _______ inches of each box, cabinet, conduit body, or other conduit termination.

Raceways• 12” 350.30(A)

Equipment• Any wiring behind heating or heating panel

sets located in interior walls or partitions shall be considered as operating at an ambient temperature of _______________ degrees Celsius and the ampacity shall be calculated on the basis of the correction factors given Article 310.

Equipment• 40 degrees 424.95(B)

Overcurrent Protection• According to Article ___________________

of the 2005 NEC, nonstandard fuses are permitted.

Overcurrent Protection• True 240.6(A)

Services• A cable tray may serve to carry service-

entrance conductors along with other conductors as long as there is a ________.

Services• Barrier 230.44Ex

Services• True of False, the disconnect for a TVSS is

not counted as one of the six disconnects allowed for a service.

Services• True 230.71(A)

Services• The service head for entrance-conductors

should be located above the point of attachment but may be located elsewhere as long as the attachment is within __________ feet.

Services• 2 feet 230.54(C) Ex

Grounding• For multiple separately derived systems the

common grounding electrode conductor shall not be smaller than __________________.

Grounding• 3/0 CU or 250Kcm AL 250.30(A)(4)(a)

Raceways• The minimum burial depth for a nonmetallic

raceway with no vehicular traffic shall be __________________ inches.

Raceways• 4" Table 300.5 Col. 3

Calculations• A conductor passing through a junction box

with a loop length of ______________ shall be counted twice for box fill calculations.

Calculations• Twice the minimum length required by Article

300.14

• 314.16(B)(1)

Grounding• When bonding equipment, __________shall

not be used for this connection and the termination shall not depend solely on__________________.

Grounding• Sheet metal screws, solder 250.8

Feeders and Branch Circuits• The size of a feeder, grounded conductor

shall not be smaller than required by_________, except that _________ shall not apply where grounded conductors are run in parallel.

Feeders and Branch Circuits• 250.122, 250.122(F) 215.2(A)

Feeders and Branch Circuits• Where the premises wiring system has

branch circuits supplied from more than one nominal voltage system, each ungrounded conductor of a branch circuit, where accessible, shall be identified by __________.

Feeders and Branch Circuits• System 210.5(C)

Equipment Use• The size of the industrial control panel supply

conductor shall have an ampacity not less than ________ percent of the full load current of all resistance heating loads plus 125% of the full load current rating of the highest rated motor plus the sum of the full load current ratings of all connected motors and apparatus based on their duty cycle that may be in operation at the same time.

Equipment Use• 125% 409.20

Equipment Use• A ballast in a fluorescent luminaire that is

used for egress lighting and energized only during a failure of the normal supply shall not have ________________.

Equipment Use• Thermal Protection 410.73(E)(4)

Grounding• The earth shall not be considered as an

effective ground fault current path. True or False

Grounding• True 250.4(A)(5)

Overcurrent Protection• Can the next standard sized overcurrent

protective device be used to protect tap conductors for transformer secondary conductors?

Overcurrent Protection• NO 240.21(C)

Grounding• All grounding electrodes as described in 250.

52(A)(1) through 250.52(A)(6) that are ____________ at each building or structure served shall be bonded together to form the grounding electrode system.

Grounding• Present 250.50

Equipment Use• Handhold enclosure covers shall have an

_____________________ that prominently identifies the function of the enclosure.

Equipment Use• identifying mark or logo 314.30(D)

Conductors and Cable Assemblies

• Type MC cable does not have to be supported if it is not more than 2 feet long and it is being used to provide flexibility to a termination. True or False

• True 320.30(D)

Equipment Use• Wiring installed in aircraft hangars in unclassified

locations that are adjacent to areas in which flammable liquids or vapors are not likely to be released, such as stock rooms or electrical control rooms, which are adequately ventilated and are effectively cut off from the hangar itself by walls or partitions, shall be permitted to be of any suitable type wiring method recognized by chapter 3 of the NEC. True or False

Equipment Use• True Exception to 513.7

Equipment Use• A 1/2" knockout will be made in a fluorescent

light fixture that will be mounted over a junction box. The light fixture will be mounted with toggle bolts. A 1/2" chase nipple will be installed so that the conductors from the box can be brought into the fixture for make up. Is this is legal installation according to the NEC?

Equipment Use• No 410.14(A)

Equipment Use• Is thermal protection required for the ballast

of a fluorescent exit light?

Equipment Use• No 410.73(E)(3)

Equipment Use• The 480 volt auxiliary equipment of an

electric discharge lamp is permanently installed in a luminaire and the luminaire is mounted on a pole for the illumination of a highway. What is the minimum height above the ground the auxiliary equipment must be mounted?

Equipment Use• 22 ft 210.6(D)(1)(a)

Equipment Use• Is the terminal of an electric discharge lamp

rated in excess of 1000V considered to be a live part according to the NEC?

Equipment Use• Yes 410.80 (C)

Grounding• Is an equipment grounding conductor

required to be installed in listed metal flexible conduit that is 2 feet in length and is used only to provide flexible connection to a motor?

Grounding• Yes 250.118(5)(d)

Grounding• Exposed, non-current carrying, metal parts of

motion picture projection equipment that is fastened in place shall be grounded regardless of voltage. True or False

Grounding• True 250.112 (H

equipment that is connected by cord and plug, regardless of voltage, that is installed in non-hazardous locations shall be grounded. True or False

Grounding• False 250.114 (1) and (2)

Grounding• The connection of a grounding electrode

conductor or bonding jumper to fire-proofed structural steel shall not be required to be accessible if it is made with an irreversible compression connection. True or False

Grounding• True 250.68 (A) Exep. 2

Grounding• A ground rod of 8 feet in length must be

installed so that the connection point of the grounding electrode conductor remains accessible and above the ground. True or False

Grounding• False 250.53 (G) and 250.68 (A) Exp. 1

Grounding• The ground fault current path of the

equipment grounding system is intended to return fault current back to the earth. True or False

Grounding• False 250.2 Back to the source

Feeders and Branch Circuits• Where calculations result in a fraction of an

ampere that is less than __________, such fractions shall be permitted to be dropped.

Feeders and Branch Circuits• .5 220.5(B)

Feeders and Branch Circuits• Outlets for heavy duty lamp holders shall be

calculated at a minimum of _______ volt-amperes.

Feeders and Branch Circuits• 600 220.14(E)

Feeders and Branch Circuits• A load not less than ___________ volt

amperes shall be included for each 2-wire laundry branch circuit installed as required by 210.11(C)(2).

Feeders and Branch Circuits• 1500 220.52(B)

Feeders and Branch Circuits• An alternate load calculation for determine if

the existing service or feeder is of sufficient capacity to serve additional loads in an existing dwelling unit is found in __________________.

Feeders and Branch Circuits• 220.83 220.83

Feeders and Branch Circuits• The rules for calculating the load on fixed

multi-outlet assemblies are found in _______________.

Feeders and Branch Circuits• 220.14(H) 220.14(H)

The End• Each of the slides will now be repeated.

• They are not timed in this segment. To change a slide, click on the side with your left mouse button.

• Be sure to physically look up the answers in your code book to improve your look up speed and skill.