: Clearance requirements for Telecomm PWB design
From: Behalf Of Dave Lorusso
There is no simple rule of thumb
Paul -
The processes Joe Randolph and Dave Lorusso covered provide
most of the details you need, though there are still
occasional gotchas. Dave, in particular
From: Behalf Of Dave Lorusso
There is no simple rule of thumb
Paul -
The processes Joe Randolph and Dave Lorusso covered provide
most of the details you need, though there are still
occasional gotchas. Dave, in particular is correct that
there is no simple rule of thumb; you must
[mailto:pmerguer...@itl.co.il]
Sent: Tuesday, October 22, 2002 10:05 AM
To: 'Denomme, Paul S.'; emc-p...@majordomo.ieee.org
Subject: RE: Clearance requirements for Telecomm PWB design
Paul,
You specify clearances only but you do not specidy creepages, dielectric
strength and distance though
Paul,
You specify clearances only but you do not specidy creepages, dielectric
strength and distance though insulation requirements.
Prior to determining the insulation requirements, you need the classiy the
insulation required (example: SELV (earthed/unearthed) to TNV-3). Then you
need to know
Paul,
Table 2N of UL 60950 applies to Creepage (spacing along the surface of a
PWB), not Clearance (through air) on a suitably coated PWB. Keep in mind
that you have to jump through some test hoops in order to use these reduced
spacings. If the pins on the connector are not suitably coated,
In a message dated 10/21/2002, Paul Denomme writes:
I am currently working on a design for the telecom industry. I need to
determine the minimum specifications for setting up my design rules for
both internal and external layers and connector selection. According to
UL60950 table 2N the
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