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Re: Tesla Coil Firehazards (fwd)
---------- Forwarded message ----------
Date: Thu, 30 Aug 2007 20:49:25 -0700
From: Frank <fxrays@xxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Tesla Coil Firehazards (fwd)
Usually a C class extinguisher is CO2 which is only effective in an
enclosed space where there is no air supply so it can smother a fire.
The space has to be small or the gas is disbursed and it is not
effective. If you are in the space, you get smothered too! A hand
held extinguisher for C fires will not be too effective in a garage or outside.
CO2 is typically used for confined spaces that the ventilation can be
shut down and there is a bank of large cylinders that is discharged.
The number of cylinders is calculated for the space volume. Common on
ships for the switchgear and engine rooms.
Class B extinguishers are usually dry chemical and can be used on C
or electrical fires, it just makes a huge mess! They are also used on
small class A fires. Look for ABC on the label.
This is the best all around extinguisher to have in your home,
garage, shop and etc. A mess is a lot better to clean up than burning down!
Water can and is used on hydrocarbon fires a lot. It takes training
and LOTS of water and is the prime fire fighting agent on ships.
There is a system designed that uses water for electrical fires too
and it is used on high tension switch gear.
Make sure your coil has a remote safety cut out for the power. This
can be as simple as an extension cord or two where the plug is in a
"safe" area.
Have a couple 5 pound dry chem extinguishers around at all times and
keep them near the exits of the space, preferably one on each side of
the exit. Cheap insurance, not only for running coils, but protecting
your home as well. They are not expensive.
Frank
At 08:31 PM 8/30/2007 -0600, you wrote:
>---------- Forwarded message ----------
>Date: Fri, 31 Aug 2007 07:35:39 +1000
>From: T476202 A. Wang 2007 <tangara_02@xxxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: Tesla Coil Firehazards (fwd)
>
>In Australia its type E for electrical fires. C is flammable gases...
>
>
> >From: "Tesla list" <tesla@xxxxxxxxxx>
> >To: tesla@xxxxxxxxxx
> >Subject: Re: Tesla Coil Firehazards (fwd)
> >Date: Thu, 30 Aug 2007 07:53:31 -0600 (MDT)
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> >---------- Forwarded message ----------
> >Date: Wed, 29 Aug 2007 19:25:55 +0000
> >From: David Rieben <drieben@xxxxxxxxxxx>
> >To: Tesla list <tesla@xxxxxxxxxx>
> >Cc: drieben@xxxxxxxxxxx
> >Subject: Re: Tesla Coil Firehazards (fwd)
> >
> >Hi Dave, all,
> >
> >As a professional firefighter for nearly 19 years now (and it's been just
> >about that long since I've had any schooling on fire extenguishers ;^),
> >it's
> >my understanding that the classes of fire extinguisher go like this:
> >
> >Class A - wood, paper, and textile products fires
> >Class B - petroleum product fires
> >Class C - electrical fires
> >Class D - combustible metal fires
> >
> >The type of fires that a commercial fire extinguisher is designed
> >to put out is labeled on the the side of the fire extinguisher. Since
> >most A class only fire extinguishers are charged with water, it's ob-
> >vious that you would not want to squirt it on a fire with liquid petroleum
> >products or certainly not live eletrical equipment involved! Also, many
> >combustible metals (sodum, potassium, magnesium, ect.) are water
> >reactive and the introduction of water to a fire involving these could
> >actually worsen the situation (anyone who's ever dropped a lump of pure
> >sodium metal into a beaker of water can attest to this!).
> >
> >Bottom line, the proper fire extenguisher for your high voltage
> >projects shop should be suitable for class C electrical fires, since
> >you may not have time to "throw the switch" before attempting extingusih-
> >ment. Most dry powder and CO2 fire extinguishers are suitable for Class
> >A, B, and C type fires. Due to its physical properties such as high
> >specific heat, surface tension, and low viscocity, water is by far
> >the universal fire fighting agent, but there are definitely some
> >situtations
> >in which water is NOT the suitable extinguishment agent!
> >
> >
> >--
> >David Rieben
> >
> >-------------- Original message --------------
> >From: "Tesla list" <tesla@xxxxxxxxxx>
> >
> > >
> > > ---------- Forwarded message ----------
> > > Date: Tue, 28 Aug 2007 11:08:59 -0400
> > > From: Dave Pierson
> > > To: Tesla list
> > > Subject: Re: Tesla Coil Firehazards (fwd)
> > >
> > >
> > > >>Tesla's lab burned down and he had a huge spiderweb coil running 24
> > > >>hrs/ day. Perhaps his coil was the reason.hrs/ day. Perhaps his coil
> >was the
> > > reason."
> > >
> > > > What's the source for that information, in particular the 24 hours a
> >day
> > > bit?
> > > > Can't imagine any reason to do that.
> > >
> > > One might also ask which lab, where, when?
> > >
> > > Back to the (valid) reccomen=mendation to have a fire extinguisher
> >handy:
> > > Be familiar with the TYPES of extinsuishers, some are rated for
> >electrical
> > > fires, some not. (I think its 'Type C' for 'all fires', but may be
> >rong.)
> > >
> > > Ideally, kill power before using, however there may not be time, the
> > > 'right'
> > > extinguisher may be important.
> > >
> > > best
> > > dwp
> > >
> > >
> > >
> >
> >
>
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