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AUC > AUC 180 MANHOLE FIRES > Flashcards

AUC 180 MANHOLE FIRES Flashcards

0
Q

10-25 code 2

A

Fire has blown one or more manhole covers or smoke is issuing from a manhole UNDER PRESSURE

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1
Q

10-25 code 1

A

Fire has extended from manhole, conduit or transformer INTO a building

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2
Q

10-25 code 3

A

Smoke is seeping from a manhole

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3
Q

10-25 code 4

A

Fire or smoke condition from a TRANSFORMER at any location

Ex: pole, vault, room

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4
Q

Utility company will dispatch an emergency crew immediately upon receipt of what signals

A

Code 1

Code 4

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5
Q

10-25 no code

A

Situations other than described in codes 1-4

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6
Q

If an odor of gas is encountered at a manhole/transformer incident the dispatcher

A

Must be notified to request immediate response of the utilities gas crew in addition to the electric crew.

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7
Q

Downed overhead PRIMARY and SECONDARY wires have the potential to

A

Damage underground gas piping. All gas piping, plastic, steel, cast iron and copper, can be impacted by burning, arching or smoldering electric cables

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8
Q

The area shall be cordoned off to

A
  • Vehicular and pedestrian traffic
  • Apparatus in safe area
  • Area taped off for danger to civilians and FD personnel
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9
Q

Inspect electrical service in

A
  • Surrounding buildings
  • Units should have CO detectors
  • Check for extension
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10
Q

Members shall not attempt to

A

Move vehicles located in the danger area

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11
Q

Hose line operations

A
  • Precautionary line stretched
  • Do not operate into manhole unless Con Ed requests at scene
  • If requested let water flow or pour into manhole
  • Do not operate stream directly into manhole
  • Use a fog nozzle to prevent or reduce shock hazard
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12
Q

When operations are within the capability of a single unit the OIC may

A

Leave one unit, preferably an engine company, to await the arrival
of the emergency crew.

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13
Q

If the expected time of arrival of the emergency crew is more than 30 minutes the OIC may order one of the following

A
  • Unit remaining on scene can respond to assigned alarms and leave one member at the scene
  • One member left at the scene and the company returns to quarters, company officers shall provide relief of members
  • When a member is left at the scene the company officer at frequent intervals contact the dispatcher for re-notification of the utility company
  • The manhole shall be protected by cones and tape and all units shall be placed in service
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14
Q

During periods of multiple incidents within an area, the following actions may be authorized by the Deputy Chief in charge

A
  • A member of the unit shall be left at the scene of each incident
  • The officer and the chauffeur shall remain with the apparatus to perform surveillance of the incident locations
  • Battalion Chiefs shall provide for necessary relief of units or members
  • Deputy Chiefs may authorize the use of messenger vans and spare cars for travel and shelter of members at incident locations
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15
Q

Members are reminded that explosions in manholes are

A

Not uncommon

16
Q

Members should not pull covers off

A

Electrical manholes at manhole fires or if a manhole fire is in the area. It is the responsibility of utility crews to open manhole covers at these incidents. Pulling covers may cause an explosion by mixing air with gaseous products of combustion in the presence of an ignition source.
THIS DOES NOT CHANGE THE DEPT POLICY OF PULLING ELECTRIC MANHOLE COVERS UNDER CERTAIN CIRCUMSTANCES AT GAS EMERGENCIES

17
Q

Explosions can take place after

A

Considerable time has elapsed and when the conditions in the manhole appear dormant. When a cover blows do not run. Keep your eyes on the cover so you can approximate where it lands

18
Q

When operating at manhole emergencies the location of

A

Traffic control boxes must be taken into consideration when deciding the size and location of the “AREA OF DANGER”. The smoke and gases from a manhole incident can travel up the hollow pole of a nearby light stanchion and at times accumulate with considerable pressure. The gaseous mixture may be ignited by a spark inside the control box.

19
Q

Hose lines stretched into the street to prevent involvement of adjacent properties should be positioned at a

A

Point beyond the predictable limits of fire or explosion damage

20
Q

Where conditions indicate the electrical lines in a building are becoming hot,

A

Hose lines shall be stretched and a thorough examination made

21
Q

Fire Department representation at the scene shall continue until

A

All dangerous conditions are alleviated or until informed by the utility company emergency crew at the scene that the Fire Department presence is no longer required. Information for the required reports shall be obtained from the utility company personnel at the scene

22
Q

Transformer vaults come in various sizes but a typical vault is approximately

A

12 x 4

These vaults are installed either in the street or the sidewalk

23
Q

Transformers convert

A

Primary voltage - 27,000 volts - to secondary voltage -
120 volts - for use by Con Ed customers. Either of these voltages can cause fatal injuries if not handled properly. Some vaults contain submersible equipment, meaning that they will function properly even if the vault is filled with water. Other vaults contain non-submersible equipment and must have a sump pump installed to prevent flooding

24
Q

All transformers that are in the vaults contain

A

Dielectric oil, which acts as a coolant, in amounts ranging from 200 gallons to 600 gallons. The trade name for the newer oil that Con Edison is presently using is SUN-OIL or MOBIL-EX. This oil contains PCB’S in the range of 10-49 PPM and therefore is considered a NON-PCB Transformer. However Con Edison still has in use vault transformers that are considered PCB-CONTAMINATED TRANSFORMERS that contain 50-499 PPM of PCB’S

25
Q

The FDNY considers a transformer with ANY amount of PCB’S as a

A

PCB Transformer

Operate accordingly

26
Q

Environmental and physical dangers presented by transformer vaults

A
  • CO
  • Other gasses in high concentrations
  • PVC in wire insulation
  • PCB’S in transformers
  • High vapor pressures
  • Possibility of explosions
  • Possibility of asbestos even though EPAhas mandated its removal
27
Q

What is the greatest hazard in these vaults

A

Amount of electricity

28
Q

Vault operations

A
  • Cordon off area
  • No need to closely examine the vault
  • Stretch a precautionary line
  • Be prepared for foam operation
  • Examine surrounding exposures at service entrance
  • Team of 2 members to make examination of exposures
  • Each member PPC, SCBA and HT and CO meter
  • Readings taken in Meter Room, Surrounding rooms, 1st Floor
  • High CO readings have been found in exposures
  • Re-examine exposure periodically
29
Q

Do not enter vaults until

A
  • Con Ed has made their examination
  • Con Ed will determine if the vault is safe for entry by FD
  • FD will conduct a CURSORY search for victims in the vault
30
Q

Con Ed does not test

A

Pole mounted transformers. Almost all of Con Ed overhead transformers are not, or were not, designed to be PCB liquid filled. They are mineral oil transformers. However due to past storage and/or servicing practices some of these transformers have become PCB CONTAMINATED 50-499 PPM. A small percentage of these transformers have attained levels of 500 PPM or greater which classifies then as PCB TRANSFORMERS

31
Q

All new transformers being installed by Con Ed as replacements for existing ones and/or new installations are

A

Non-PCB transformers

32
Q

Concerning manhole fires always transmit

A

The 10-25 & request Con Ed response

33
Q

For additional help the BC can call the

A

Con Ed shift manager directly

34
Q

Consider calling the Con Ed shift manger directly if

A

*Con Ed ETA is not satisfactory
*Call to clarify the condition
If conditions worsen call Con Ed with an updated report
Explain the need for priority response
Transmit an updated progress report to the dispatcher
*Technical info is required to assist with tactics
*Dangerous CO in surrounding properties
*Transformer fire affecting several occupancies
*Sensitive or high profile occupancy

35
Q

At a Con Ed substation incident that is NOT staffed by Con Ed

A

Contact the Con Ed Substation Manager

36
Q

If a condition affects a large area contact

A

OEM for assistance

AUC (54 decks)

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