|
Gene,
There are several types of wiring insulation
that are smoke-free / Halogen-free & self extinguishing. You should avoid
any kind off PVC wiring at all costs as "its burning insulation creates copious
amounts of smoke, and the insulation can turn to hydrochloric acid when exposed
to moisture." (http://www.aviationtoday.com/reports/wiring7.htm).
"Teflon is rated for continuous operation in
temperatures from -60°C to 200°C and retains its exceptional toughness and Flexibility
within this range. TFE Teflon is not degraded by chemicals which makes it ideal
for use in harsh environments. Teflon is widely regarded as the ultimate high
performance wire Insulation material for environments characterized by extreme
thermal or chemical conditions." (http://www.alphawire.com/pages/175.cfm).
While teflon is a less likely to cause
problems in a sub, there are still precautions to take as even though it has
excellent properties, it releases a series of toxic fumes at different
tempreatures which could be very hazardous in an enclosed compartment such as a
submersible. I am not sure, but don't quote me on it, but I believe that Teflon
is not approved to use in Pressure Vessels for Human Occupation (PVHO).
Some of the hazards of inhaling
teflon-generated gases are at http://tuberose.com/Teflon.html
The best is to stick with smoke-free
halogen-free wiring such as that used on aircraft.
On the safety side, a separate air supply
for emergency breathing is advisable (required for ABS classed subs) for added
safety.
I hope this helps,
Hugo
-----Original Message----- From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org]On Behalf Of HUNTR2@aol.com Sent: Thursday, May 27, 2004 3:34 AM To: personal_submersibles@psubs.org Subject: Re: [PSUBS-MAILIST] Copper wiring.
|