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
>
>
>
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