Podcast
Questions and Answers
Where are disconnects (large switches) found?
Where are disconnects (large switches) found?
- Large buildings
- Large homes and factory’s
- Some homes and many commercial/industrial occupancies (correct)
- Apartment buildings
What type of fuses might be found in older homes that allows for easy removal to shut off power?
What type of fuses might be found in older homes that allows for easy removal to shut off power?
- Miniature circuit fuses
- Circuit breaker fuses
- Screw-base fuses and/or pullout disconnects that hold cartridge fuses (correct)
- Standard plug fuses
What are the two types of electrical disconnections mentioned for shutting off power?
What are the two types of electrical disconnections mentioned for shutting off power?
- Main disconnects and inline fuses
- Screw-base fuses and pullout disconnects (correct)
- Double-pole breakers and cartridge fuses
- Fuse box and circuit breaker
Which option is not mentioned as a type of disconnect that may be present in older homes?
Which option is not mentioned as a type of disconnect that may be present in older homes?
What should be done with individual breakers when shutting off electricity at a residential property?
What should be done with individual breakers when shutting off electricity at a residential property?
Why is it important for PSO and ONG to respond in cases of utility damage?
Why is it important for PSO and ONG to respond in cases of utility damage?
In which scenario should the main breaker be shut off instead of individual breakers?
In which scenario should the main breaker be shut off instead of individual breakers?
What should be done if a breaker is in the tripped position?
What should be done if a breaker is in the tripped position?
What is a reliable indicator that a gas valve is in the 'off' position?
What is a reliable indicator that a gas valve is in the 'off' position?
Which statement about water meter valves is correct?
Which statement about water meter valves is correct?
Where is the valve typically located on propane tanks?
Where is the valve typically located on propane tanks?
What must structural companies avoid doing with gas lines?
What must structural companies avoid doing with gas lines?
What should companies identify in the area regarding propane?
What should companies identify in the area regarding propane?
Which actions is prohibited for TFD members?
Which actions is prohibited for TFD members?
What should TFD members avoid doing with wires?
What should TFD members avoid doing with wires?
Which of the following is included in the restriction for TFD members?
Which of the following is included in the restriction for TFD members?
Which task is explicitly forbidden for TFD personnel?
Which task is explicitly forbidden for TFD personnel?
Tanks at propane fill stations take their supply from the bottom of the tank and will have a remote shut off handle similar to?
Tanks at propane fill stations take their supply from the bottom of the tank and will have a remote shut off handle similar to?
Some older homes will have ____ base fuses and or _____ disconnects that hold cartridge fuses. Either of these may be removed to shut off the power
Some older homes will have ____ base fuses and or _____ disconnects that hold cartridge fuses. Either of these may be removed to shut off the power
TFD will not attempt to pull meters, cut wires or remove _____ cartridge fuses
TFD will not attempt to pull meters, cut wires or remove _____ cartridge fuses
Flashcards
Disconnects
Disconnects
Large switches found in homes and many commercial or industrial buildings.
Screw-base fuses and Pullout Disconnects
Screw-base fuses and Pullout Disconnects
Older homes might use these fuses, which are easy to remove to shut off the power.
Types of disconnections
Types of disconnections
These disconnections are used to shut off the power in older homes.
Smart Fuses
Smart Fuses
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Note breaker status
Note breaker status
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PSO and ONG
PSO and ONG
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Shutting off the main breaker
Shutting off the main breaker
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Tripped breakers
Tripped breakers
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Gas valve 'off' position
Gas valve 'off' position
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Water meter valves
Water meter valves
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Propane tank valve
Propane tank valve
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Capping gas lines
Capping gas lines
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Propane emergency shutoff valves
Propane emergency shutoff valves
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TFD restrictions
TFD restrictions
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Wire cutting
Wire cutting
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Removing cartridge fuses
Removing cartridge fuses
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Forbidden tasks
Forbidden tasks
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Remote shut off handle
Remote shut off handle
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Study Notes
Residential Utility Shut-Off
- TFD can shut off utilities safely in residential areas, usually at one and two-family homes.
- When utilities are damaged, the Incident Commander (IC) must call PSO and ONG to pull meters to prevent unsafe usage.
- Property owners must repair and inspect utilities before restoring service, especially important in rental properties.
Electric Shut-Off
- Control electricity by turning off the main breaker at the electrical panel, avoiding individual breakers to aid in fire investigations.
- If individual breakers are turned off, document their status (on or tripped).
- Older homes may use screw-base fuses or pullout disconnects to shut off power.
- Larger switches, known as disconnects, are found in some homes and many commercial/industrial buildings.
Natural Gas Shut-Off
- Shut off natural gas by turning the meter valve 90 degrees to the pipe; the valve can spin infinitely.
- Line up padlock holes to confirm the valve is in the "off" position.
- TFD members are prohibited from plugging or capping gas lines.
- Some gas meters are located in underground canisters similar to water meters.
Water Shut-Off
- Water meter valves function similarly to gas meter valves, with distinct "on" and "off" positions.
- In the "off" position, padlock holes also align for verification.
Propane Shut-Off
- Propane tanks have a valve on top, which may be shielded by a padlocked bonnet or dome.
- Some industrial setups use valves located at the end of the tank for easy access.
- Propane fill stations draw supply from the bottom of tanks and feature remote shut-off handles.
- Awareness of local emergency shutoff valve locations is crucial for safety.
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