TB 8 Flashcards
Electrical Accidents account for ___ deaths per year
700
Electrocution accounts for ____ percent of worker deaths annually
12
In the past ____ years electrocutions have accounted for more than ____ firefighter deaths
20
25
LAFD responds to over _____ electrical incidents annually
3000
Amps is the ______ and is equivalent to hydraulics_____
Current Flow
GPM
Volts is the currents ______ and equivalent to hydraulics _______
Pressure or push
PSI
OHMS is a measurement of ________
Equivalent to hydraulics _______
Resistance
Friction loss
Ohms Law Equations
Watt= amps x volts
Amps = watts + volts
Volts = watts + amps
Extremely High voltage is ______
Excess of 60,000 volts
Extremely High voltage is ______
Excess of 60,000 volts
High voltage is _______
600 - 59,999 volts
Low voltage is ______
Less than 600 volts
LADWP primaries are usually ________
4.8kvs
Transmission lines range from ______ volts to ________ volts. With most in LA being ______
69kv
1000kv
230kv or higher
Generation systems generate _______ to _______
4000 to 20000
High voltage capacitors can hold charge for
Weeks
Transmission insulator sizes
3-20 feet long
LADWP has some transmission lines at ______ kv to ______ kv
138
230
LADWP has _____ receiving stations
21
Receiving stations receive electricity at ____ to _____ and step down voltage to _____ kv which is known as sub transmission
138 to 500
34.5
Voltage is stepped down ____ times before reaching consumer
3
There are over _____ distribution stations where electricity is received at ______ and stepped down to ______ which is known as _______
150
34.5kv
4.8kv
Primary circuit voltage
LADWP has over ______ primary circuits each with an average of ______ consumers
1500
750
3 Ways of determining high voltage
- High voltage signs on cross arms
- Size and shape of insulators
- Distance between conductors
