Hi Doug:
You ask: > Questions: If you claim your equipment is > pluggable type equipment type A: > > Are you exempt from 5.2.5 ??? Sort of. If you are Pluggable Type A, then you cannot exceed 3.5 mA leakage current. If you do not exceed 3.5 mA leakage current, then Sub-clause 5.2.5 does not apply. > Are you allowed to use IEC-320 connectors? You can use IEC 320 connectors IF your leakage current is less than 3.5 mA. If you use IEC 320 connectors and your leakage current is more than 3.5 mA, then you fail the leakage current test and do not comply with IEC 950. If you then change the connector to IEC 309 or equivalent AND mark the product per Sub-clause 5.2.5, then you comply with IEC 950. > What really constitutes the difference between > pluggable type equipment type A versus pluggable > type equipment type B? Just the plug? Pluggable Type A and Pluggable Type B are defined by the plug. If you are Pluggable Type A, then leakage current cannot exceed 3.5 mA. If you are Pluggable Type B, then leakage current can exceed 3.5 mA PROVIDED you mark the product. If you are Pluggable Type B and your leakage current is less than 3.5 mA, then you do not need to mark the product. > Or better, what is the spirit behind all this? The spirit is that if you have high leakage current (which I understand is unavoidable in very large equipment), then you must have a reliable and robust ground to carry away the leakage current. If you have seen an IEC 309 connector pair, you will see that it is virtually impossible to defeat the ground. So, TC 74 specified industrial-grade plugs for such applications rather than outlawing high leakage current. Furthermore, the presumption is that high leakage currents are associated with high-power-consumption products that would tend to use IEC 309 connectors anyway. > Do you have to state this in product material > to the customer? No. At least, such a statement is not required by IEC 950 -- only the marking on the product. Best regards from the Super Bowl, Rich ------------------------------------------------------------- Richard Nute Quality Department Hewlett-Packard Company Product Regulations Group San Diego Division (SDD) Tel : 619 655 3329 16399 West Bernardo Drive FAX : 619 655 4979 San Diego, California 92127 e-mail: [email protected] ------------------------------------------------------------- > From [email protected] Tue Jan 20 15:28:51 PST 1998 > Received: from hpsdlo.sdd.hp.com (hpsdlo.sdd.hp.com [15.255.160.64]) by > hpsdlfsg.sdd.hp.com with ESMTP (8.7.6/8.7.3 TIS 5.0/sdd epg) id PAA00244 for > <[email protected]>; Tue, 20 Jan 1998 15:28:50 -0800 (PST) > Received: from ruebert.ieee.org (ruebert.ieee.org [199.172.136.3]) > by hpsdlo.sdd.hp.com (8.8.6/8.8.5tis+epg) with ESMTP id PAA01316 > for <[email protected]>; Tue, 20 Jan 1998 15:28:48 -0800 (PST) > Received: (from daemon@localhost) > by ruebert.ieee.org (8.8.8/8.8.8) > id QAA10314 for emc-pstc-list; Tue, 20 Jan 1998 16:43:31 -0500 (EST) > From: "Doug McKean" <[email protected]> > To: "EMC-PSTC" <[email protected]> > Subject: EN-60950 Question ... > Date: Tue, 20 Jan 1998 16:35:43 -0500 > X-MSMail-Priority: Normal > X-Priority: 3 > X-Mailer: Microsoft Internet Mail 4.70.1161 > MIME-Version: 1.0 > Content-Type: text/plain; charset=ISO-8859-1 > Content-Transfer-Encoding: 7bit > Message-ID: <[email protected]> > Sender: [email protected] > Precedence: bulk > Reply-To: "Doug McKean" <[email protected]> > X-Resent-To: Multiple Recipients <[email protected]> > X-Listname: emc-pstc > X-Info: Help requests to [email protected] > X-Info: [Un]Subscribe requests to [email protected] > X-Moderator-Address: [email protected] > > Situation: Piece of equipment measures over > 3.5 milli-amps for earth leakage test: > > According to EN-60950 > > "5.2.5: Equipment with an earth leakage current > exceeding 3,5 mA > > CLASS I STATIONARY that is PERMANENTLY CONNECTED > EQUIPMENT, or that is PLUGGABLE EQUIPMENT TYPE B ... " > > then three conditions follow one of which is > labeling requirements. > > Definition of PLUGGABLE EQUIPMENT TYPE B > is located in 1.2.5.2. > > > Questions: If you claim your equipment is > pluggable type equipment type A: > Definition of pluggable type equipment > type A is located in 1.2.5.1. > > Are you exempt from 5.2.5 ??? > > Are you allowed to use IEC-320 connectors? > > What really constitutes the difference between > pluggable type equipment type A versus pluggable > type equipment type B? Just the plug? > > Or better, what is the spirit behind all this? > > Do you have to state this in product material > to the customer? > > Regards, Doug > >
