HW TEST #1

In insulated grounded conductor of _______ or smaller shall be identified by a continuous white stripes on other than green insulations along its entire length. A) 8 AWG B) 6 AWG C) 4 AWG D) 3 AWG

) 6 AWG

Manhole openings for personnel shall be located where they are not directly above electrical equipment or conductors in the enclosure. Where this is not practicable. A) A protective barrier or a fixed ladder shall be provided B) Covers shall be under (100 lbs) C) A locking system is provided for protection D) Grip pads are used to prevent slipping.

A) A protective barrier or a fixed ladder shall be provided

Where leads are supplied with lamp holders the conductor attached to the screw shell shall have a _______ finish A) White or gray B) Green or green with yellow stripes C) Any color D) Pango pink or other light color

A) White or gray

The required working space for access to live parts operating at 300 Volts to ground, where there are exposed live parts on one side and grounded parts on the other side. A) 3ft B) 3 1/2 ft C) 4 ft D) 4 1/2 ft

B) 3 1/2 ft

The working space in front of electric equipment shall not be less than ________ wide, or the width of the equipment, whichever is greater. A) 15 in B) 30 in C) 40 in D) 60 in

B) 30 in

Equipment associated with the electrical installation can be located above or below other electrical equipment within their working space when the associated equipment does not extend more than __________ from the front of the electrical equipment. A) 3 inches B) 6 inches C) 12 inches D) 30 inches

B) 6 inches

The floors of vaults in contact with the earth shall be concrete that is not less than ________ thick, but where the vault is constructed with a vacant space or other stories below it, the shall shall adequate structure A) 3 inches B) 6 inches C) 12 inches D) 18 inches

B) 6 inches To the bank!

On a 4 wire, delta connected system where midpoint of one phase winding is grounded, only the conductor or busbar having the higher phase voltage to ground shall be durably and permanently marked by an outer fishing that is ______ in color or by other effective means. Such identifications shall be placed at each point on the system where a connection is made if the grounded is also present, A) Red B) Orange C) Green D) Black

B) Orange high leg

In locations where electrical equipment is likely to be exposed to _______, enclosure or guards shall be arranged and of such strength as to prevent such damage. A) Corrosion B) Physical damage C) Magnetic fields D) Weather

B) Physical damage

A door used by personnel to exit the work space that is less than 25 feet from the working space shall, A) swing outwards but remain locked B) swing outwards with simple pressure C) swing inward and be locked D) swing inward with simple pressure

B) swing outwards with simple pressure

Access openings in a manhole shall not be less than _________ A) 20 inches B) 24 inches C) 26 inches D) 36 inches

C) 26 inches (its 24 inches if its low voltage or a ladder)

Where rear access is required to work on de energized parts on the back of enclosed equipment a minimum working space of __________ horizontally shall be provided A) 24 inches B) 30 inches C) 36 inches D) 48 inches

C) 36 inches

The dimensions of working spaces access to live parts operating at 300V, nominals to ground, where there are exposed live parts on both sides of the workspace is A) 3ft B) 3 1/2 ft C) 4 ft D) 4 1/2 ft

C) 4 ft

Where this code specifies that one equipment shall be "in sight from", "within sight from" or "within sight of", and so forth, another equipment, the specified equipment is to visible and not be more than _____ distant from the other. A) 5 ft B) 25 ft C) 50 ft D) 100 ft

C) 50 ft No obstruction must be within hindsight

For equipment rated 1200 amperes or more and over 6 feet wide that contain over- current devices, there shall be one entrance not less than 24 inches wide and _______high at each end of the working space. A) 5 ft 6 inches B) 6 ft C) 6 ft 6 inches D) Any of the above

C) 6 ft 6 inches 110.26(c)(2)

When the code uses the words "________" it means the identified actions are allowed but not required, and they may be options or alternative methods. A) Shall B) Shall not C) Shall be Permitted D) A or B

C) Shall be Permitted

Where conductors of different system are installed in the same raceway, one system shall have a neutral having an outer covering of white or natural gray and each other system having a neutral shall have another covering of A) White or natural gray B) White with green stripe C) white with colored stripe other than green or distinguished by other suitable approved means D) Blue

C) white with colored stripe other than green or distinguished by other suitable approved means

If the cover for an underground pull box is not locked, bolted or screwed into place, then it must weigh equal to which of the following. A) 10 lb B) 25 lbs C) 100 lbs D) 101 lbs

D) 101 lbs (must be over 100 POUNDS, not equal or less than 100 POUNDS)

In the NEC, the words "________" indicate a mandatory requirement. A) Shall B) Shall not C) Shall be Permitted D) A or B

D) A or B

The Authority Having Jurisdiction has the responsibility _______ A) For making interpretations of rules B) For deciding upon the approval of equipment and materials. C) For waiving specific requirements in the Code permitting alternate methods and materials if safety is maintained D) All the above

D) All the above (For NYC the authority having jurisdiction is the NYC DOB)

To guard live parts over 50V but less than 600V, equipment is permitted to be __________ A) Located in a room only accessible to qualified persons B) Located on a balcony accessible only qualified persons. C) Elevated 8 ft or more above floor or other working surface D) Any of these

D) Any of these

According to the NEC, bare live parts are guarded from the public in the following methods except? A) By elevation of 8 ft. B) By location on a suitable balcony, gallery, or platform C) By suitable permanent, substantial partitions D) Protected by Fireproof curtain.

D) Protected by Fireproof curtain.

Which of the following are not permitted for protection of equipment in electrical vaults. A) Reinforced concrete roof with a 3 hour rating B) Reinforced concrete wall with a 3 hour rating C) An automatic halon or carbon dioxide fire suppression D) Studs walls covered with wallboard having a 3 hour ratings

D) Studs walls covered with wallboard having a 3 hour ratings