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From: ron_well...@agilent.com
To: emc-p...@majordomo.ieee.org
Subject: Bonding Impedance
Date: Wed, 24 Jul 2002 14:57:33 -0600
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-Original Message-
From: ron_well...@agilent.com [mailto:ron_well...@agilent.com]
Sent: Wednesday, July 24, 2002 1:58 PM
To: emc-p...@majordomo.ieee.org
Subject: Bonding Impedance
Hello all,
I recent issue has come up for me regarding why some safety standards
...@majordomo.ieee.org
Subject: Bonding Impedance
Date: Wed, Jul 24, 2002, 3:57 PM
Hello all,
I recent issue has come up for me regarding why some safety standards
specify 100 milliohms as the acceptable impedance for a protective earth
ground bonding test. I am curious as to what the rationale
due to I squared X R
heating effects. This 25 A value for a test current is a conservative way to
ensure that the voltage developed across the bonding impedance is of a low
value. MIL-STD 882, System Safety, requires testing bonding impedance at
125% of the rating of the overcurrent protection
Hello all,
I recent issue has come up for me regarding why some safety standards specify
100 milliohms as the acceptable impedance for a protective earth ground bonding
test. I am curious as to what the rationale is for this specific value and why
25 amps is chosen as the default test
)
owner-emc-pstc@majordo Subject: question on
measuring bonding impedance
mo.ieee.org
Is there a standard method for measuring AC bonding impedances for
electrical bonding?
Thanks in advance,
Susan Beard
---
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at:
...@majordomo.ieee.org]On Behalf Of Michael Taylor
Sent: Monday, April 15, 2002 2:02 PM
To: 'Ken Javor'; Robert Wilson; shbe...@rockwellcollins.com;
emc-p...@ieee.org
Subject: RE: question on measuring bonding impedance
I promised myself I was not going to drag out my soap box and jump
I read in !emc-pstc that Michael Taylor mtay...@hach.com wrote (in
da60a3b237698944981e58ebf28d76d03de...@iris.lvl.hach.com) about
'question on measuring bonding impedance', on Mon, 15 Apr 2002:
for domestic product safety EN-61010 Sect 6.5.1 requires 25Amps (DC or
ACrms) or 2x the fuse
I read in !emc-pstc that Robert Wilson robert_wil...@tirsys.com wrote
(in 3FF57405336C9B4C976A1819F860A2560F6966@xng_tirsys.TIRSYS.COM)
about 'question on measuring bonding impedance', on Mon, 15 Apr 2002:
How about the usual method of determining the value of very low
resistances and impedances
Susan,
I'm not sure what AC means in your message below. I'm
assuming that you mean in the radio frequency range, where low bonding
impedance across joints means good shielding effectiveness.
There is an SAE standard for measuring the transfer impedance
across EMI
out in Colorado)
-Original Message-
From: Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: Monday, April 15, 2002 11:44 AM
To: Robert Wilson; shbe...@rockwellcollins.com; emc-p...@ieee.org
Subject: Re: question on measuring bonding impedance
I wasn't going to respond to this one
the
dc galvanic potential out.
--
From: Robert Wilson robert_wil...@tirsys.com
To: shbe...@rockwellcollins.com, emc-p...@ieee.org
Subject: RE: question on measuring bonding impedance
Date: Mon, Apr 15, 2002, 10:46 AM
How about the usual method of determining the value of very low
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