UL 469-2009 pdf download – Musical Instruments and Accessories.
2.1 .3 A component shall be used in accordance with its recognized rating established for the intended conditions of use. 2.1 .4 Specific components are recognized as being incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specified limits, and shall be used only under those specific conditions for which they have been recognized. 2.2 Units of measurement 2.2.1 When a value for measurement is followed by a value in other units in parentheses, the first stated value is the requirement. 2.2.2 All applicable alternating-current electrical measurements are in root-mean-square (rms) units unless otherwise stated. 2.3 Undated references 2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 3 Glossary 3.1 For the purpose of this standard the following definitions apply. 3.2 FIBER – Where the term fiber is used, vulcanized fiber is meant. 3.3 HAZARDOUS CIRCUITRY – Circuitry involving a risk of electric shock as described in the Leakage-Current and Shock-Current Tests, Section 36, or a risk of fire as described in Risk of Fire, Section 26. 3.4 INSULATION, BASIC – The insulation necessary for the proper functioning of the product and for basic protection against electric shock.
3.5 INSULATION, REINFORCED – An improved basic insulation with such mechanical and electrical qualities that it, in itself, provides the same degree of protection against electric shock as an insulation system comprising both basic insulation and supplementary insulation. 3.6 INSULATION, SUPPLEMENTARY – An independent insulation provided in addition to the basic insulation to protect against electric shock in case of electrical breakdown of the basic insulation. 3.7 LOW-VOLTAGE CIRCUIT – A circuit involving a peak open-circuit potential of not more than: a) The applicable values specified in Table 36.1 , where wet contact is not likely to occur or b) 21 .2 volts peak where wet contact is likely to occur. 3.8 ORDINARY TOOL – A flat-bladed or cross-recessed screwdriver or pliers. 3.9 PRODUCT, COMMERCIAL – A product intended for use in commercial establishments, hotels, motels, houses of worship, schools, studios, and businesses. 3.1 0 PRODUCT, HOUSEHOLD – A product intended for use in the home.