C22.2 No. 4248.1-17 Fuseholders — Part 1: General requirements

C22.2 No. 4248.1-17 Fuseholders — Part 1: General requirements. 3 Service conditions 3.1 The requirements of this Standard are based on fuseholders being used in a clean and dry environment under normal ambient temperature conditions. The manufacturer should be consulted if fuseholders are to be used in extreme conditions. 4 Classification 4.1 The fuseholders covered by this Standard and the subsequent Parts are identified according to the fuse type that is intended for installation installed in the fuseholder. Reference is made to the designation system described in the 248 Series of Standards. 5 Characteristics 5.1 Summary of characteristics 5.1.1 General 5.1.1.1 The following terms identify the characteristics of fuseholders covered by this standard and the subsequent parts. 5.1.2 Intended fuse 5.1.2.1 Fuseholders are designated according to the fuses that they are designed to accept. Example: A Class J fuseholder is one intended to accept a Class J fuse. 5.1.3 Voltage and current rating 5.1.3.1 The voltage and current rating of a fuseholder are equal to or greater than the rating for the fuse that it accepts. AC testing is required, and is also considered to cover DC rating of the same value. Additional testing is needed for a higher DC voltage rating. 5.1.4 Withstand rating 5.1.4.1 The withstand rating of a fuseholder, if applicable, is specified in subsequent parts. 5.1.4.2 The withstand rating only applies to fuseholders that have subsequent parts of this Standard. 6 Marking 6.1 Marking of fuseholders 6.1.1 The information on a fuseholder shall be legible and include the following, with the corresponding symbol of measurement: a) Manufacturer’s identification (such as name, trademark, or both); b) Catalog number or equivalent; c) Voltage rating; d) Current rating; and e) Withstand rating in rms symmetrical amperes or DC amperes or both (AC/DC). Note: At the discretion of the manufacturer, a fuseholder may be marked with the degree of protection (IP code) when evaluated in accordance with Annex B Ref. No. 12. C22.2 No. 4248.1 pdf download.