...@tycoint.com [mailto:richwo...@tycoint.com]
Sent: Monday, October 28, 2002 7:48 PM
To: emc-p...@majordomo.ieee.org
Subject: RE: Layered Reinforced Insulation
OK, I'll get more specific. I have an external interconnecting cable that
contains hazardous voltages. Because of the application, in the USA I
I too have had some struggles with this concept.
I now tend to think of Basic, Reinforced and Double more in terms of an
insulation strength as opposed to an actual material. For instance, Double
insulation can be provided by a properly set and maintained distance through
air, i.e no
I read in !emc-pstc that richwo...@tycoint.com wrote (in 846BF526A205F8
4BA2B6045BBF7E9A6A046758DF@flbocexu05) about 'Layered Reinforced
Insulation' on Mon, 28 Oct 2002:
Someone mentioned that the
two insulations must be the same material in order for the system to be
classified as reinforced.
OK, I'll get more specific. I have an external interconnecting cable that
contains hazardous voltages. Because of the application, in the USA I must
use UL Listed CL3P cable which is rated for use in risers and air handling
spaces (smoke requirements of the National Electrical Code). The
...@majordomo.ieee.org] On Behalf Of Peter L. Tarver
Sent: Friday, October 25, 2002 4:41 PM
To: emc-p...@majordomo.ieee.org
Subject:RE: Layered Reinforced Insulation
Bill -
This is not quite correct. Reinforced Insulation may also
be a single piece of insulation (I do note you used may).
There's
Richard -
Which edition are you referring to? 2.2.1 in EN60950-1 and
EN60950, 3rd ed., addresses general requirements for SELV
circuits. In these standards, there is also no
2.9.4.anything.
I'll assume for now that it's 2nd ed., through the 4th
amendment.
2.9.4.2 refers to thin sheet
Bill -
This is not quite correct. Reinforced Insulation may also
be a single piece of insulation (I do note you used may).
There's no definition, per se, of multiple layers, except
for the case of thin sheet material.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI
A reinforced insulation system by definition may be multiple layers if it is
all the same insulating material. Two different insulating materials must be
evaluated as double insulation = one of the materials must meet the
requirements for basic insulation, the other material must meet the
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