Peter,
You are right, the standard does address movable equipment, but movable equipment is not even mentioned with regard to the stability tests of 4.1. It only uses the term relative to fire enclosure and leakage current. The stability tests are essentially unchanged since the larger computer equipment days of IEC 435 and involve only static, not dynamic testing. We had the experience of several mainframes roll over in production due to shock mounted castors on a narrow wheelbase and had to go to palletizing them during production. I'm sure this will be better addressed by the coming hazard based standard IEC is developing. Bob Johnson ITE <http://www.itesafety.com/> Safety -----Original Message----- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org] On Behalf Of Peter Merguerian Sent: Friday, October 18, 2002 5:03 AM To: 'john...@itesafety.com'; Peter Merguerian; 'Joshua Wiseman'; 'Emc-Pstc (E-mail)' Subject: RE: Mobile Power Cart Bob, You state: "Note that 60950 stability requirements are intended to address equipment which is not in motion." I disagree. Parag. 1.2.3.1 of the 60950 standard defines monable equipment as one that is either - 18 kg or less in mass and not fixed, or - equipment with wheels, castors, or other means to facilitate movement by the operator as required to perform its intended use. What I think you meant to say is that the stability requirements in 60950 should be revised by the international standards community to address tipping when they encounter floor joints, elevator thresholds, etc, a special concern when battery acids may be involved. All the Best,
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