1.1 Scope

1.1.1 These fuseholders and devices accommodate fuses to be employed in electrical circuits and are intended to be used in accordance with the Canadian Electrical Code, Part I (CE Code Part I), CSA C22.1, the National Electrical Code (NEC), ANSI/NFPA 70, or the Mexican Electrical Code, NOM-001.

1.1.2 These requirements cover:

a) Fuseholders for fuses intended for use with fuse classes covered in the ANCE NMX-J-009-248; CSA C22.2 No. 248 and UL 248 series of standards, Parts 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15; and

b) Fuseholder accessories (such as covers, indicators, adapters, etc.).

Summary of Topics

The second edition of the Standard for Safety for Fuseholders - Part 1: General Requirements, UL 4248-1, has been issued to reflect the latest ANSI approval date, and to incorporate the following proposals:

• Withstand rating on supplemental fuseholders.

• Clarification of the insulating material requirements in Table 7.1 of Clause 7.2.

• Addition of requirements for “Specific Use Fuseholders”.

• Clarification of the marked voltage rating.

• Addition of ambient temperature correction and allowance for repeated test.