group, why cant the 3 amp only be marked? its the lower current rating thus best protective of a product, many labels of ratings for equipment state 110/220, yet, you only see the lower voltage's ( 110)'s current(higher) rating on the product, please educate me why this fuse situation is more critical/important than a units overall current marking stamped on the power ratings.
thnak you, Richard, Richard A. Stone Excel Switching Corporation Compliance 75 Perseverance Way Hyannis, MA. 02601 508 862 3311 ph. 508 862 3020 fax This email message and any attachments to it contain confidential information that is intended only for the person or entity to which it is addressed. Any review, retransmission, dissemination, printing, or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please delete it or inform the sender. From: [email protected] [mailto:[email protected]]On Behalf Of Richard Nute Sent: Thursday, March 11, 2004 1:04 PM To: peter merguerian Cc: [email protected] Subject: Re: Wide Voltage Range ITE Product with a 250 V 3.0 / 3.15 A fuse Hi Peter: A fuse is a safeguard. The rating is critical to the fuse's performance as a safeguard. If the fuse is replaceable, then the fuse rating must be marked to assure replacement with the same rating and thereby continue the effectiveness of the safeguard function. The required fuse is either a 250 V, 3 A fuse (North American), or a 250 V, 3.15 A fuse (other countries). Since the product is to be marketed worldwide, BOTH ratings must be marked on the product. (I presume you have tested the product with both fuses to prove that each provides the required degree of safeguarding.) For North America, you would still need the warning. Best regards, Rich peter merguerian wrote: > Dear All, > > Assume subject ITE product is to me marketed worldwide and has an inlet > with fuseholder. Fuse rating calculated at 3 A. The problem is that a 3 > A fuse is readily available in N. America as Listed 250 V/3 A but not > readily available worldwide - in such locations IEC 127 type 250 V > /3.15 A rating is readily available. Manufacturer intends to stock and > ship units with a Listed 250 V 3 A fuse - stocking of two different > fuses is a problem from the logistics side. > > Question: What should the fuse rating markings be? Marking 250 V 3 A is > good for US and Canadian customers since they could go to the nearest > supply store and obtain a Listed fuse. However, for European and other > customers, the fuse rating marking can be misleading since IEC127 type > fuses are rated at 3.15 A. > > Do you all agree that a fuse rating marking is not required? Since most > fuseholders in appliance inlets can be opened only by means of a coin or > other tool, the fuse symbol can be marked adjacent to the fuseholder and > the ratings 250 V 3 A (Noth America) and 250 V 3.15 A (other countries) > can be explained in the service manual. This is allowed in the 950 > standard. This also eliminates the need for the English/French user > accessible cautionary statement "CAUTION: For continued protection > against risk of fire, replace only with same type and rating of fuse" > required by the US/Canadian deviations which manufacturers have a tough > time making room for such long statements. > > Peter Merguerian > > > This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
