specimens are to be preconditioned for flammability (94 V0, V1 V2) testing.
1. two sets of five specimens each are to be preconditioned in accordance
with
ASTM D618 at 23 C, 50 RH for 48 hours.
2. two sets of five specimens each are to be preconditioned in an
air-circulating oven for
I agree with John - but the question also raises other issues:
* what about plastisizers (SP?) ?
* what about hardening agents?
* what about fillers?
Will sustained heating cause embrittlement or creeping?
Will parts have the necessary resilience to impact or yield over their life?
That's the
Richard, I think that is one of the reason that the flame tests require aging
in ovens before UL et al burn them, but I don't know for certain.
Gary
From: richwo...@tycoint.com [mailto:richwo...@tycoint.com]
Sent: Tuesday, March 18, 2003 6:32 AM
To: emc-p...@majordomo.ieee.org
Subject:
I read in !emc-pstc that richwo...@tycoint.com wrote (in 846BF526A205F8
4BA2B6045BBF7E9A6A04675DB4@flbocexu05) about 'Fire Retardants' on Tue,
18 Mar 2003:
If a plastic containing a fire retardant is subjected to high heat (for
example, due to a overheated component) for an extended period of
It's hard to tell the limits of your inquiry. In simple US NEC terms, there
is no special name for the termination of the grounded conductor or
neutral at the load. However, you can have star connected three phase loads
and view the neutral as a star connection point. It simply is not a code
If a plastic containing a fire retardant is subjected to high heat (for
example, due to a overheated component) for an extended period of time (many
hours or several days), is it possible that the fire retardant in the
plastic will outgas sufficiently to decrease the flame rating of the plastic
Group Members,
My apologies for a slightly off-topic question for the electricians amongst us.
Is there a special term used for the zero connection point of neutral
conductors at the load end
of a three-phase network, i.e. the equivalent of the 'star' connection point
at the transformer,
Marko,
Thanks for your comments.
My understanding is that a “Dark Fiber” has an other meaning : a service
offered by a Telco or a service provider to extend the usage of your fiber LAN
for example to increase the distance from one mile to 100 or more.
In this case the fiber adapter, in my case
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