30 Questions
What should be done before spraying water onto electrical equipment?
Confirm with a utility representative that the equipment is deenergized
What is the potential danger of spraying water directly onto power lines?
The hose streams can conduct current
What can happen if equipment is not grounded?
It can contain electric potential, which can cause severe injury or death
What is the danger associated with power lines and wet ground?
Voltage can travel through both dry and especially wet ground for considerable distances
What is the potential risk of downed power lines?
They must always be considered energized with potentially lethal current
How can power lines become hot or energized again?
By manual operation of a switch, by automatic re-closing methods, by induction, or through back-feed conditions
What is the potential danger associated with PCB hazards?
Smoke is potentially fatal, contain pools of oil around transformers
How can voltage travel to points far from the scene?
Electricity can flow through the ground or other conductive objects
What is the danger associated with pad-mounted and overhead transformers?
They can explode
How can the Thermal Imaging Camera assist in identifying downed power lines?
By deploying it in Search and Rescue mode
What is the primary policy of the Cleveland Division of Fire in response to reports of power lines down and other hazards involving energized electrical equipment?
To ensure the safety of the public and respond for fire control
What is the responsibility of the company officer in dealing with electrical emergencies?
Maintain a high degree of safety for their crew and the public
What are the potential causes of power lines coming into contact with the ground?
Weather related events, fire, or vehicles striking a power pole
What must be considered in all cases involving power lines down and other incidents with energized electrical equipment?
The potential for electrical shock/electrocution and fire
What is emphasized in the section about electrical safety awareness?
Electricity will travel through any conductive path available to seek ground
What is mentioned as a potential direct path to ground in the context of electrical safety awareness?
Contact between something that is electrically energized and a portion of your body
What is included in the potential path for electricity seeking ground?
Tools or other equipment you may be using
What should be considered when coming into contact with a fence, vehicle, or other object in the context of electrical safety awareness?
That the object has become energized
What is the primary purpose of the mentioned Standard Operating Procedure (SOP)?
To establish the response and approach procedures to electrical emergencies
What is the role of the electrical utility company (CEI/CPP) in dealing with electrical emergencies according to the SOP?
To be contacted for assistance
What should personnel do when downed power lines and vehicles are involved?
Instruct occupants to jump free of the vehicle without touching the vehicle and ground at the same time
What action should be taken in the event of sub-station, transformer, electrical vault, and manhole fires?
Clear the area and protect exposures
What should be done before making entry into a substation or vault?
Ensure the electrical equipment has been de-energized
What action should be taken when an electrical emergency is present in a building?
Disconnect the power at the main breaker
What should be used when rescue is necessary near electrical equipment and the power status is unconfirmed?
CO2 or dry chemical extinguisher
What should be done to power pole fires before making a direct fire attack?
Request utility company response and do not make a direct fire attack until the electrical equipment has been de-energized
What should be done if wooden fences are exposed to high voltage, especially when wet?
Consider them as potentially energized
What should be used to shut off power from solar PV systems?
Operating disconnecting devices or contacting the local electrical utility
What should be done if communication/data lines create a public hazard?
Notify Fire Dispatch and request Cleveland Police for traffic control
What danger is created by downed power lines energizing the ground around them?
Step potential danger
Study Notes
Electrical Safety Procedures for Emergency Response
- Wooden fences can become energized when exposed to high voltage, especially when wet
- Downed power lines can energize the ground around them, creating a step potential danger
- Personnel must assess the scene to determine if the downed line is electrical or data/communications
- Request utility company response for downed power lines and vehicles
- Instruct occupants to jump free of the vehicle without touching the vehicle and ground at the same time in the event of downed power lines and vehicles
- Clear the area and protect exposures in the event of sub-station, transformer, electrical vault, and manhole fires
- Do not make entry into a substation or vault until the electrical equipment has been de-energized
- Request utility company response for power pole fires and do not make a direct fire attack until the electrical equipment has been de-energized
- Notify Fire Dispatch about communication/data lines and request Cleveland Police for traffic control if the lines create a public hazard
- When an electrical emergency is present in a building, the power shall be disconnected at the main breaker
- Use a CO2 or dry chemical extinguisher when rescue is necessary near electrical equipment and the power status is unconfirmed
- Operating disconnecting devices or contacting the local electrical utility to disconnect power from the grid does not shut off power from solar PV systems
Test your knowledge of electrical safety procedures for emergency response with this quiz. Learn about the dangers of downed power lines, substation and transformer fires, and how to assess and manage electrical emergencies to ensure the safety of personnel and the public.
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