[41180] in North American Network Operators' Group
Re: What is the limit? (was RE: multi-homing fixes)
daemon@ATHENA.MIT.EDU (Vadim Antonov)
Thu Aug 30 18:53:32 2001
Date: Thu, 30 Aug 2001 15:52:09 -0700 (PDT)
From: Vadim Antonov <avg@exigengroup.com>
To: nanog@merit.edu
In-Reply-To: <Pine.3.89.10108300904.B26292-0100000@equinox.shaysnet.com>
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Actually, talking about water/electricity interaction in refrigerators,
lab equipment, etc, misses the very simple point - a probability of a leak
is proportional (as a good approximation :) to the number of moveable
components (PCBs, connectors, etc) in the system. In a typical CO it's
tens or hundreds of thousands.
--vadim
PS. Water is not a good coolant, and even distilled and deionized
water tends to pick ions from metal parts rather quickly. Spirits
are flammable; CFCs are bad for environment. There's also an
issue of toxicity.
Of course, everything is doable, but what is the cost?
Off-the-shelf components are all designed for air cooling.
Switching to liquid cooling means a lot of custom stuff; which is
expensive and which takes a long time to design and manufacture.
PPS It is not voltage which matters, it's current :) Even if leaks do
not cause shorts the moisture accumulation may corrode parts
leading to mechanical shorts, it also may cause excessive
cross-talk. Sporadically malfunctioning equipment is much worse
than flat-out burned out.
PPS Finally, getting your hands wet makes your changes to get killed
by electricity _much_ higher. 48V won't do you any harm if your
hands are dry, it may kill if they're wet.
