Ned,
I know this isn't the standard you are using but I happen to have been using
it lately and quickly found a similar situation. EN61010-1:2001, 6.5.1.1
Integrity of protective bonding:
d) Movable conductive connections, for example, hinges, slides, etc., shall
not the sole PROTECTIVE BONDING path unless they are specifically designed for
electrical interconnection and meet the requirements of 6.5.1.3.
6.5.1.3 specifies the PROTECTIVE BONDING impedance shall not exceed 0.1 ohm.
Dave Cuthbert
Micron Technology
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Ned Devine
Sent: Friday, November 14, 2003 8:29 AM
To: IEEE EMC/Product Safety (IEEE, EMC/Product Safety)
Subject: Grounding
Hi,
I need some help. I told someone that you can not depend on mechanical
contact only (i.e. in this case a door hinge) for protective earth. Even if
it passes the test, it would still not be acceptable because it does not meet
the construction requirements. He then asked me to show him were it said that
in the standard (IEC 60950-1 or IEC 60601-1). I looked and could not find it.
Am I just missing it, or is it not in the standards?
There is a reference in CSA standards to C22.2 No. 0.4 that has the
requirement, but I can not find a similar reference in UL or IEC standards.
Ned Devine
Program Manager III
Entela, Inc.
3033 Madison Ave. SE
Grand Rapids, MI 49548
Phone: 616 248 9671
Fax: 616 574 9752
e-mail: ndev...@entela.com
www.entela.com
1-800-888-3787
Web: www.entela.com
Grand Rapids * Detroit * Boston * Toronto * Taipei
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