Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
52 Cards in this Set
- Front
- Back
The open-circuit voltage between the two terminals of a single pole switch on a lighting circuit when the switch is in the off position is |
120 volts |
|
An arc flash can produce temperatures of _______ degrees Fahrenheit. |
35,000 |
|
Listing and labeling of electrical equipment is done by a ______? |
Recognized testing Laboratory |
|
The purpose of electrical symbols on plans is ______? |
To provide a code to prevent untrained persons from doing electrical |
|
The national electrical code is a minimum ______ standard |
Safety |
|
The meaning of approved is ______? |
Acceptable to the authority having jurisdiction |
|
All measurements in the National electrical code are shown in which systems of unit |
Both inch-pounds and metric value |
|
In the industrial System of Units the prefix kilo means ______? |
Thousand |
|
Nationally recognized Testing Laboratories ______ electrical products to provide the basis of approval by inspectors in the field |
Test and list |
|
Devices are equipment who's primary function is to carry current not |
Utilize electric energy |
|
All the following items of electrical equipment are devices except for a _____. Receptacle Three-way switch Lamp Disconnect switch |
Lamp |
|
The NEC requires that a _____ be installed at each conductor splice connection point |
Box or conduit body |
|
In the International System of Units the prefix milli means _____? |
One thousandth |
|
In order that connections inside an outlet box remain accessible NEC requires that a surface extensions from an outlet box cover be made using ____ |
Flexible conduit |
|
Electrical wall boxes should not be mounted back-to-back in walls because |
Sounds may be transferred from room to room It reduces the fire resistance of the wall The practice violate building codes |
|
According to ______ unused Knockouts and other openings in electrical boxes and cabinets are required to be closed |
Article 100 NEC 110 .12 a |
|
Device faceplates must be mounted so as to |
Cover the opening in the wall Feet against the wall surface |
|
A receptacle Outlet is _____ |
A contact device for the connection attachment plug |
|
Where non-combustible surface material is used on walls or ceiling outlet boxes must be mounted so that they will be back not more than ______ from the face of the surface material |
1/4 inch |
|
As defined in article 100 a dwelling unit has the following features |
Permanent Provisions for living sleeping cooking and sanitation |
|
A 20 ampere Appliance circuits required by NEC are permitted to serve no other load except for |
One outdoor GFCI protected receptacle |
|
NEC article 210 provides --- guidelines for locating receptacles outlets in Residence |
Mandatory |
|
Wall receptacles in a habitable room must be placed so they are no further than --- from any point along the wall |
6 feet |
|
A continuous load shall not exceed --- of the rating of the branch circuit |
80% |
|
Where fixed glass panes do not permit installation of wall mounted receptacle --- are typically used to satisfy the receptacle spacing required of the NEC |
Floor mounted receptacles |
|
In construction of one and two family dwellings the electrical circuits are usually designed by the |
Electrician |
|
The minimum lighting load requirement for dwelling units is --- per square foot |
3 volt amperes |
|
How is track lighting load in Residence calculated? |
It is considered to be part of the general lighting load of 3 volt amperes per square foot |
|
A 20 ampere branch circuit requires --- AWG conductors ignoring the effects of voltage drop |
12 copper |
|
Small appliance receptacle Outlets --- included in the three volt ampere per square foot load calculation |
Are not |
|
12 foot rule for spacing receptacles applies to all of the following areas of the house except for |
The Attic |
|
The National Electric Code requires receptacles installed in a garage to be |
GFCI protected |
|
All of the following are included when calculating an unused area of a dwelling to compute the required lighting load except for |
Crawl space |
|
Name several factors that may be taken into account when sizing boxes per the NEC |
Wire size , Amount of wiring in a box , Number of outlets being installed |
|
Explain what is meant by a normal cage rating |
A piece of equipment that will use plus or minus 10% |
|
What is the purpose of the National Electric Code? |
The safeguarding of persons and property from electrical hazards |
|
How is an outlet defined by the NEC? |
A point on the wiring system at which current is taken to supply utilisation equipment |
|
Explain the requirements for installing lighting fixture more than 50 pounds |
The Box must be rated for the weight of the lighting |
|
Explain the difference between a receptacle and a receptacle Outlet |
A receptacle is a contact device installed at the outlet for connection attachment plug A receptacle Outlet is an outlet one or more receptacles are installed |
|
Explain why the code in general discourages mounting receptacle below the edge of kitchen countertops |
Children are able to reach them |
|
Calculate the minimum number of 15 ampere lighting Branch circuits required 1850 square feet |
3 amperes X 1850 feet / 120 volt Equals 46.25 amps 46.25 divided by 15 Equals 3.083 4 ampere lighting branch circuits are required |
|
What is the NEC definition for a qualified person |
A person who is skilled and knowledgeable relating to the construction and operation of electrical equipment and installation, and has safety training to recognize hazards. |
|
What is meant by fire resistance rating? |
The amount of time a wall can resist a fire |
|
Name the kitchen receptacles that are not required to be protected by ground fault circuit interrupters |
All designated Outlets such as microwave , gas range, refrigerator |
|
In walls or ceilings constructed of non combustible materials such as concrete or tile The Edge outlet boxes permitted to be set back not more than --- from the finished surface |
1/4 inch |
|
Nationally recognized Testing Laboratories test and evaluate products for |
Safety |
|
Receptacles are not permitted to be mounted directly over --- heaters in residential construction |
Baseboard |
|
The Authority having jurisdiction over electrical construction is generally the |
Local inspector |
|
Device boxes are designed for what size screws |
6 - 32 in and 10 - 32 inch |
|
Where there are --- or more on the interior stairway a wall switch control stairway lighting must be provided on each floor level and level has an entryway |
6 risers |
|
--- provide additional information about a job that may not be found on the blueprints |
Specifications |
|
Lighting outlet boxes are designed for what size screws? |
8 - 32 inch and 10 - 32 inch |