Drawings and Plans
What type of drawing shows the heights of windows, doors, porches, and roof pitches?
Answer: Elevation view.
What needs to be submitted when there is a difference between the working drawings and the written specifications?
Change order.
Which NEC section covers mandatory roof clearances for overhead service conductors?
NEC Section 230.24(A).
Type SE cable must be secured within how many inches of each terminal when used as a service-entrance conductor?
12 inches.
Which electrical testing device identifies whether voltage is present and gives the general range of voltage?
Voltage tester. like with a multimeter or solenoid voltage tester aka wiggy. Non contact ones wont give range.
What size would the floor plan drawing be for an 80-foot by 50-foot building using a scale of 1/4 inch = 1 foot?
Answer: 20 inches by 12 feet 5 inches.
What is the minimum general load per square foot of living space for residential dwellings according to NEC Section 220.41?
Not less than 3 VA per square foot.
What is the minimum distance from the ground for service drop conductors when voltage is limited to 300 volts to ground?
12 feet.
In the living area of a residential space, what is the maximum distance for receptacle spacing?
12 feet.
Which electrical testing device can only be used by a qualified person for testing insulation?
Megohmmeter.
What does the electrical symbol S3 mean on a drawing?
Answer: Three-way switch.
Which NEC section covers rules for applying demand factors for (Non Dwelling) receptacle loads?
NEC Section 220.14(I).
NEC Section 230.6 considers conductors to be outside of a building when installed in conduit under how many inches of concrete beneath a building?
2 inches.
What does CO/ALR imprinted on a receptacle mean?
Suitable for use with copper, aluminum, or copper-clad aluminum wire.
Which voltage causes more deaths than any other voltage?
120 volts.
What percent of its rated capacity can a branch circuit be loaded to?
Answer: 80%.
What is it called when noncurrent-carrying conductive parts of a system are connected together to create a conductive path?
Bonding.
What color is the grounding conductor in cables usually if it is not bare?
Green.
Which NEC articles cover installation of low-voltage system wiring?
NEC Articles 724 and 725.
A cable that contains insulated circuit conductors enclosed in armor made of metal is called what?
Metal-clad cable, or Type MC cable.
Which NEC section specifies general requirements for a construction project?
Answer: NEC Section 110.3.
What is the maximum conduit size for flexible metal conduit, or FMC, to be used as an equipment grounding conductor?
1ΒΌ inches.
Which NEC section states that cable must be secured within 12 inches of every cabinet, box, or fitting and at distances not exceeding 4.5 feet thereafter?
NEC Section 334.30.
What is the minimum distance a switch must be from the water when installed adjacent to a hot tub or swimming pool?
5 feet.
A factory-assembled cable with two or more insulated conductors and a nonmetallic jacket is called what?
Nonmetallic-sheathed cable, or Type NM cable. aka romex