Training Bullitin 8 Electrical Hazards Flashcards
What is considered high voltage?
Over 600 volts
How big an area should be cleared for a downed conductor?
At least 1 pole span
How often are gauntlet gloves tested by DWP?
Every 60 days
How much do manhole covers weigh?
300 pounds
How many volts are in street lights?
Up to 4800 volts
According to training bulletin 8 - electrical hazards, what is extremely high voltage, high voltage and low voltage?
Excess of 60k
600-59,999
Under 600
Street lights can be fed from conductors carrying what voltage?
120-6150 volts
When applying water to an electrical fire, what is the rule for psi, cone and distance from object
30/33/100
When using fire line tape to secure an area of life hazards zone, how should you apply strands?
Minimum of 3 horizontal lines with fire line or flagging tape at least 1-3 inches in diameter , with the words do not enter or don not cross
When having occupants remove their own vehicle from possible electrical charge, what is the minimum distance they should move their vehicle from the danger?
35 feet
DWP can de-energize power lines in a relatively short period of time according to training bulletin 8 a electrical hazards. What is the time frame?
Between 5-10 min
When operating at a brush fire maintain a safe distance of ____feet from transmission towers, maintain at least ______feet from the outer most wires from transmission lines and never direct a hose stream into heavy plumes of smoke with in _____feet of high voltage wires.
35 feet
100 feet
100 feet
According to training bulletin 8- electrical hazards, man hole cover can weigh _____lbs, and have been blown ____feet into the air and travelled _____feet
300 lbs
75 feet
125 feet
What is the flash point of the cooling oil that is used electrical vaults?
300
Low voltage secondary lines carry how many volts?
120-240 volts
What are AMPS?
Current flow
Similar to gpm
AMPS= watts/volts
What are volts?
Pressure
What are watts?
The amount of actual power
Generation facilities generate how much power?
4,000-20,000 volts
The insulators on transmission towers are how far apart?
3’-20’ depending on voltage
Receiving stations reduce power to how many volts?
34,500
Distribution stations reduce power to how many volts?
4,800
Overhead transformers reduce power to how many volts?
120/240 volts
What are the 3 ways to determine high voltage lines?
1) high voltage signs
2) size of insulators
3) distance between conductors
Heart paralysis can occur at how many AMPS?
4
Tissue is burned at how many amps?
Greater than 5 amps
Respiratory arrest has occurred when shocked at as low as how many volts?
49
Communication cables can have up to how many volts?
50
What is the explosive range of carbon monoxide?
12.4-74%
Wet skin may have a resistance of up to how many ohms?
Dry skin?
Wet skin- 1000 ohms
Dry skin- 100,000 ohms
What is the lowest amps a fuse or circuit breaker will open?
15 AMPS
For every minute defibrillation is delayed chance of survival decreases what percent?
10%
600 volts can be up to how many amps?
4
