UL 248-6:2000 pdf download Low-Voltage Fuses – Part 6: Class H Non-Renewable Fuses
General
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 corespond to like numbered Clauses in Part 1. The requirementsof Pat 1 apply unless modified by this Part. For Clauses not shown below, reler to the Standard for Low-Volage Fuses — Part 1General Reguirements.NMX-J-009/248/6-2000-ANCE、CSA C222 No 248.1 UL 248-1
1.1 Scope
This Part applies to Class H Non-Renewable fuses rated 600 A or less and ither 250 or 600 V ac. DCratings are optional.
4 Classification
Class H Non-Renewable fuses have an interrupting rating of 10,000 A. Both of the voltage ratings 250 Vac and 600 V ac are divided into six body sizes with the maximum current rating in each size as specifiedin this Part. These fuses are not classified as current limiting. Time-delay ratings are optional.
In Canada, 250 V ac fuses rated 15 – 60 A shall have a low melting point “p (“D for time delay)characteristic.See Clauses 6.1 and 9.2.
5 Characteristics
5.2 Voltage rating
For AC, the rating shall be 250 V ac or 600 V ac in accordance with dimensions shown in Figures A andB.
The DC voltage rating may be different from the AC rating
5.3 Current rating
Refer to Figures A and B for range of current ratings in each body size for each voltage rating
5.5 Interrupting rating
For AC – 1 0,000 A
For DC – 1 0,000 A
6 Marking
6.1 Marking of fuses
In addition to the requirements in Part 1 : Fuses with a low melting point characteristic, for Canada, shall be marked with a ″P″ or with a ″D″ for time delay.
g) The fuse shall not be marked ″Current Limiting.″
7 Construction
7.1 Dimensions
Fuse dimensions are shown in Figures A and B.

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