TB 8: Electrical Hazards Flashcards
What are the principles of electricity?
Basic form of energy and static or moving current
Amps = (compared to water)
GPM
Volts = (compared to water)
Pressure
1 kilovolt is equivalent to how many volts?
1000 volts
Ohms= ( compared to water)
Resistance, friction loss
Watts=
Amps x volts
Low voltage is how many volts?
599 and below
High voltage is how many volts?
600 to 59,999 volts
How many volts is extremely high voltage?
60,000 and up
Generating systems generate between ________ to ________ volts
4000 to 20,000
Relay switch stations do what to the volts
Raise the voltage
How many kilovolts do the transmission lines transfer energy?
69k to 1000kv
How many kilovolts do the transmission lines transfer in at to LA?
230kv
At how many kilovolts is the line then considered a transmission line?
69kv
How many feet are insulators on electrical lines?
3-20 feet
The electrical distribution system steps down the voltage how many times before being delivered to consumers?
3x’s
What are the 4 types of injuries from from electrical shock?
Electrocution
Shock
Burns
Falls
DWP primary distribution lines are usually ____kv?
4.8
Cross arms carry voltage sings that states _____.
High voltage 750 volts
When directing hose streams on a power pole, what is the 30/33/100 indicate?
30 degrees stream
33 feet
100 psi
What voltage are street lights powered to?
120 to 6150
What are the 2 main components of the electrical transportation system. ____ and _____
Grids and transmission lines
When spotting apparatus around affected power poles, spot at least the stance of
2 power poles ( 1 span)
_____ amp of electricity going through the body for just 2 seconds is enough to cause death
1/10
