Dennis Miles <
[email protected]> wrote:
> Always GREAT advice Roland,
> I merely wanted to add, when selecting a dry powder extinguisher, the
> A-B-C ratings are your application guide. A is burning solids like
> upholstery or wood or plastic and dry powder is the least effective on those
> so you often see a small A class rating on inexpensive dry powder
> extinguishers. The class B rating is effectiveness on burning liquids like
> oil or grease fires and those you dare not use water on as water will spread
> an oil fire. Dry power is usually most effective on liquids, so a high class
> B rating is typical. Class C is electrical. Plasma Boy has a lot of
> experience with those of people on this list; he makes a great example for
> us all to insulate your battery terminal wrench. For battery fires get the
> biggest class C and A rating in the largest extinguisher you can mount in a
> accessible location, perhaps two or three in locations where they are
> reachable, a step back away from the fire, grab the extinguisher after
> activating the physical disconnect, and remove safety pin, point at base of
> flames and spray with a sweeping side to side motion. Remember you might
> only get a 10 second blast, And save people First, cars and batteries can
> be replaced, Friends and Family are Irreplaceable !
> Regards
> Dennis Miles
>
> On Wed, Nov 10, 2010 at 9:56 AM, Roland Wiench <
[email protected]> wrote:
>
>> Hello Andrew,
>>
>> I have on board my EV since 75 a CO2 extinguisher which is normally use for
>> removing the air from a fire of burning combustibles, but it may not in
>> some
>> cases put out a electrical arc in energized equipment. In this case, you
>> need a substance that will coat the energized surfaces to stop the arc
>> which
>> is a dry power type C extinguisher.
>>
>> I have never had a electrical arc sustain more than a second between on
>> cell
>> and the side of a aluminum battery case which was grounded. This happen
>> when I turn on the charger and I quickly turn off the charger and unplug
>> the
>> AC main plug.
>>
>> In some cases, just turning off the circuit breaker may not do it, because
>> the ground path is still connected.
>>
>> In electrical fire in electrical equipment and cabinets, we first turn off
>> the power and we like to use the CO2 where it is easier to clean up.
>>
>> In a battery that is energized all the time and the case is busted open,
>> then a dry power class C extinguisher is prefer. If the fire is on the
>> surface of the batteries which was initial cause by a arc and the case and
>> surrounding material is burning than it's prefer to remove the air by a CO2
>> extinguisher.
>>
>> To remove the initial arcing on batteries then try the dry chemical type,
>> but if the fire has spread to combustibles, then use the CO2.
>>
>> Roland
>>
>>
>> ----- Original Message -----
>> From: "Andrew Wood" <
[email protected]>
>> To: "EVDL" <
[email protected]>
>> Sent: Wednesday, November 10, 2010 1:22 AM
>> Subject: [EVDL] Fire Extinguishers for batteries
>>
>>
>>> Is it best to use a CO2 or a dry powder extinguisher on batteries (Li ion
>>> or lead acid)? Or does it not really matter?
>>>
>>> Regards
>>> Andrew
>>>
>>> Sent from iPhone
>>>
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>
>
>
> --
> Regards,
> *Dennis Lee Miles* (Director) *E.V.T.I. inc*.
> *www.E-V-T-I-Inc.COM <http://www.e-v-t-i-inc.com/> *(Adviser)*
> EVTI-EVAEducation Chapter
> *
> Phone (813) ID4 - E V T I or (813) 434 - 3884 (I think word phone
> numbers can be fun and good mnemonics aid memory.)
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