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UL 1417 – Special Fuses for Radio-and Television-Type Appliances

Please note: All interim revisions for this edition available at time of your purchase will be included.

These requirements cover special types of fuses not covered by separate requirements and that are for use in radio- and television-type appliances where they arerelied upon to limit power or current, or both. These requirements also apply to holders intended to accept such special fuses, where the holder may be an integralpart of the fuse design. It should be noted, however, that compliance of a special fuse with these requirements does not assure that it is acceptable for use as aprotective device in the end-use product.

A special fuse is a single function (providing protection only) device intended to interrupt a current flow when the current passing through it exceeds a preselectedvalue. It is nonrenewable, that is, the fuse element cannot be replaced after operation, but it can be multi-operational (multi-element).

The acceptability of any special fuse covered by these requirements in any particular device or appliance depends upon its effectiveness in continued use under theconditions that prevail in actual service. Accordingly, for a particular application, the special fuse may be affected by the requirements for the device or appliance inquestion, and it may be necessary to employ protective devices having features other than, or in addition to, those specified in these requirements.

A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this Standard, andthat involves a risk of fire, electric shock, or injury to persons shall be evaluated using the appropriate additional component and end-product requirements todetermine that the level of safety as originally anticipated by the intent of this Standard is maintained. A product whose features, characteristics, components,materials, or systems conflict with specific requirements or provisions of this Standard shall not be judged to comply with this Standard. Where appropriate, revisionof requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this Standard.