Shared Flashcard Set

Details

0701
LP 484 Electrical Hazards
21
Other
Professional
09/26/2007

Additional Other Flashcards

 


 

Cards

Term
Street lights can be up to ?
Definition
4800 V
Term
What voltage can be carried through High Voltage Conductors?
Definition
34,500 V
Term
High Voltage Signs on cross arms indicate conductors with more than ____ Volts?
Definition
750
Term
What act as circuit breakers in high-voltage circuits?
Definition
Fuse or Cutouts
Term
How many different configurations of wires may be found for service conductors?
Definition
3 twisted around each other known as a Triplex
Term
Are street lights energized during daytime hours?
Definition
Normally there is no current flowing in the daytime.
Term
What is unusual about the position of the street light on power polls?
Definition
wires may be located on lower cross arms.
Term
Low Voltage conductors sometimes called secondaries carry ______________ volts?
Definition
240 or 480
Term
Transformers reduce high voltage to lower voltage, usually ____ to ________?
Definition
120 to 480 Volts
Term
High Voltage insulatros may be used to handle up to _________ volts?
Definition
66,000
Term
Usually used to isolate defective service area and is to be operated by power company patrolman only?
Definition
Line Sectionalizing Switch
Term
Controls the voltage to transformers bank below and is operated by the POWER COMPANY poatrolman.
Definition
Rack Switch
Term
High Line Hand switches carry up to 34,500 volts. When may firefighters operate them?
Definition
NEVER!!!
Term
When wires are down you must Notify OCDS and give the correct address and brief description, indicate ________?
Definition
Pole to Pole
or
House to Pole
Term
What wires may be cut by firefighter?
Definition
low voltage wires 750 volts or less
Term
When cutting wire use a mechanical axe and rubber gauntlet gloves. The gloves are test to ______ every ______ days by DWP. WHo are they exchanged with?
Definition
10,000V
60 days
BN Staff Assistant
Term
Do not cut Triplex cables unless?
Definition
They are seperated and cut individually
Term
What are transmission lines used for?
Definition
To carry high volatge electricity
Term
What is the purpose of a distribution station?
Definition
These stations take power from transmission lines and reduce the voltage for use in the ditribution line.
Term
The main fire hazard within the underground vaults lies in the colling oil used in the transformers which has a flash point below ?
Definition
300 deg
Term
Can you use water to put out a fire in an underground vault?
Definition
never put water into a vault. Use only nonconducting extinguishers and only when requested to do so by DWP
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