200s Freeway, Power Lines/ Equipment, Light Rail Flashcards
What are some typical problems to consider on the freeway?
1: Water supply
2: Relay pumping
3: Special equipment (Tender, Foam, lighting, tow)
4: Early call for traffic control
5: Shut off of auto lift stations at underpasses
6: Drains (when dealing spilled materials)
7: Traffic
8: Access (dispatch another crew?)
9: Liquid transfer equipment
10: Metering drains and spaces
11: Notify ADOT when we enter and make changes to pump stations (keys in BC truck)
12: Comms with DPS (must be established)
How should we approach the scene on a freeway?
Direction of travel
May proceed against flow with DPS approval once assured traffic is stopped
Which lights should be used when responding on freeways?
Hazards are preferred but may use emergency lights if necessary
What are other safety considerations with Freeways?
1: Have a lookout
2: Park on access road if difficult entry
3: Use ladder for overpass
4: Lifelines if down a steep embankment
5: Leave unnecessary vehicles off freeway
6: If the vehicle is not needed to block park as far off as possible
7: If road is depressed may be easier to “drop a line down”
8: Loosen tension turnbuckles
When 3 or more units responding on freeway what should initial report include?
1: Traffic Conditions For access
2: Fire no Fire
3: Lanes blocked
What is included in the follow up report on a freeway incident?
1: Injuries
2: Extrication
3: Evac
4: Haz
5: Resource need
You can be electrocuted by a direct or indirect shock, what is the difference?
Direct: You make contact with something that is energized
Indirect: Something that is touching you is touching something energized
What is step potential?
Down lines will energize the ground around them and radiate out. If you step in this area you complete the circuit
This is indicated by Tingling feet
This is sever when the ground is wet
What are key points when dealing with electricity?
1: Lines must always be considered energized
2: Lines can re energize or become hot again
3: Do not use TICs to determine if a downed line has power
4: Power lines have reel memory
5: Dont spray water until you are sure it is not energized
6: Use short burst of water in fog pattern at base of pole
7: Primary concern is protect surrounding area
8: Potential deadly smoke from oil
9: Circuit may not trip
10: Cannot tell volts by size of conductor
11: Transformers can explode
12: Electricity can travel through ground and energize other objects
Electrical Equipment is broken into three categories, what are they?
1: Energized
2: De-energized (cannot be 100% guarentee, we consider this not safe)
3: Dead (confirmed by utility reps)
How do we respond to down power lines?
1: Assume all energized
2: Request Utility company
3: Park away from and not under lines
4: Secure area deny entry
5: Create LAZ with danger tape
6: May leave 1 member on scene to wait for utility co
7: Multiple poles call for additional resources
What if the lines are on a car?
1: Do not touch car
2: Have occupants stay inside
3: If they must exit have them jump and not touch car and ground then have them take small steps
How do we respond to Substation vault or manhole incidents?
1: Request utility co
2: Clear area
3: Be aware of explosion potential
4: LAZ
5: Protect exposures
6: DO NOT ENTER until utility says safe lock out tag out
How do we respond to pole fires?
1: Request utility
2: All wires energized
3: Spot apparatus
4: LAZ
5: DO NOT make fire attack until utility says de energized
What are the general light rail terms?
LRV: Light Rail Vehicle OCS: Overhead Contact System TPSS: Traction Powered Substation ETS: Emergency Trip Switch OCC: Operations Control Center Pantograph: Mechanical arm that connects train to