5th Test Flashcards
What are the cheapest type of poles
Wood
What are some non wood poles / structures
Aluminum concrete fiberglass and steel
How do you determine the whole depth used for poles
Is determined by the pole type and soil
Four classes of insulators for poles
Pin post suspension and strain
What are conductors for overhead lines made out of
Stranded or solid aluminum copper steel
What’s another name for a down guy
Anchor
What do grounds protect
Equipment
When would you use underground electrical distribution systems
When ordinance codes require its use or overhead is unsightly
Two types of underground electrical distribution systems
Direct buried and conduit encased in concrete
Where are underground electrical distribution systems used
Industrial areas residential and airfields
Another name for a manhole
Splice chamber or cable vault
What is a riser and what must it go into
Underground connection to overhead via riser goes into pothead
All Ferris hardware used in Pole line construction must be what
Standard line galvanized steel
What is the pitch in a duct system underground
3 in per 100 ft for draining
How to lay ducks
Is began midway between manholes and when ducks May flare out
When does interior wiring begin
Begins where distribution system service connects to building and extends throughout known as service entrance
How often is the NEC published and who publishes it
Every three years by the NFPA
What sub part houses electrical in the 29 CFR
Subpart k
What should portable tools always be plugged into and should have what
Should have a third prong for a ground and should always be plugged into a GFCI
What is the simplest wiring system
Two wire single phase 50 amps or less usually for lighting
What is the most common wiring system
Three wire single phase
110/220 lighting and power
Heating and air conditioning
What are the four types of wiring systems
2 wire single phase
3 wire single phase
3 wire 3 phase
4 wire 4 phase
What are three types of service disconnects
Knife blade
fuse block
breaker which is the most common
Are three types of nmsc
NM insulated conductor non-metallic jacket
Nmc insulated conductor non corrosive jacket
Nms signaling and data non-metallic
What’s another name for Romex
Nmsc
How often should data be stamped on Romex
Every 24 in
What are octagonal boxes used for
Lighting outlets
What are round boxes used for
Overhead for lighting
What’s the mounting height for wall switches
48 in
What’s the mounting height for receptacle outlets
18 in
What’s the mounting height for bed lights
72 in
What are the types of electrical tests
D Energizer operational test
Operational test
Continuity test
High potential
Resistance testing
Grounds to metallic water pipe system should be made on what side of meter
Streetside
The system neutral equipment grounds should be grounded on what side of the service disconnect
Should be grounded on the supply side
How is an electrical continuity test verified by QC
Visually
Which type of conduit is used for service entrance raceways
RMC
Are running threads allowed at couplings
No
Runs in wet areas should have at least how much space between conduit and wall
1/4 in
What color is the grounded conductor
White or gray
What color is the grounding conductor
Green or bear
Branch circuit conductors within 3 in of ballast shall be for use at what temperatures
No lower than 90° c
Panel boards must have what filled out
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