UL 248-2:2000 pdf download Low-Voltage Fuses – Part 2: Class C Fuses
1General
NOTE-
This Part is intended to be read together with the Standard for Low-Voltage Fuses – Part 1: General Requirements, hereafterreferred to as Part 1. The numbering of the Clauses in this Part corresponds to like numbered Clauses in Part 1. The requirementsof Pat 1 apply unless modified by this Part. For Clauses not shown below, refer to the Standard for Low-Voltage Fuses – Part 1.General Requirements,NMXJ-009/248/2-2000ANCE+ CAN/CSA C22.2 No.2481 UL 248-1.
1.1 Scope
This Part applies to Class C fuses rated 1200 A or less and 600 V ac. DC ratings are optional.
4 Classification
Class C fuses are nonrenewable with an interrupting rating of 200,000 A. Class C fuses are divided intoeight body sizes. The maximum current rating, ln, for each size is specified in this Part.
5 Characteristics
5.2 Voltage rating
For AC, the rating shall be 600 V ac.
The DC voltage rating may be different from the AC rating
5.3 Current rating
Refer to Figure A for range of current ratings in each body size
5.5 Interrupting rating
For AC – 200.000 A
For DC, the preferred ratings are 10,000, 20,000, 50,000, 100,000, 150,000, or 200,000 A
5.6 Peak let-through current and clearing I 2 t characteristics
Maximum values of peak let-through current and clearing I 2 t are given in Table A.
UL 248-2:2000 pdf download
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