1.1 Scope
This part of IEC 60947 applies to fuse terminal blocks with screw-type or screwless-type clamping units
for the connection of rigid (solid or stranded) or flexible copper conductors for the reception of cartridge
fuse-links in accordance with IEC 60127-2, intended primarily for industrial or similar use in circuits not
exceeding 1 000 V a.c., up to 1 000 Hz or 1 500 V d.c., and having a maximum short-circuit breaking
capacity of 1 500 A.
They are intended for installation in electrical equipment with enclosures which surround the fuse terminal
blocks to such an extent that they are accessible only with the aid of a tool.
For certain applications, for example in control circuits, the fuse terminal blocks may be designed
exclusively for short-circuit protection.
NOTE This standard may be used as a guide for fuse terminal blocks for the reception of special cartridge fuselinks
which do not meet the requirements of IEC 60127-2.
The object of this standard is to specify safety requirements and test methods for the mechanical,
electrical and thermal characteristics of fuse terminal’ blocks, to ensure the compatibility between terminal
blocks and standardized fuse-links.
This standard may be used as a guide for
– fuse terminal blocks requiring the fixing of special devices to the conductors, for example
quick connect terminations or wrapped connections, etc.;
– fuse terminal blocks providing direct contact to the conductors by means of edges or points
penetrating the insulation, for example insulation displacement connections, etc.
Where applicable in this standard, the term “clamping unit” has been used instead of the term “terminal”.
This is taken into account in case of reference to IEC 60947-1.
1.1DV D2 Modification by adding the following:
This standard specifies requirements for fuse terminal blocks with screw-type or
screwless-type clamping units for the connection of rigid (solid or stranded) or flexible
copper conductors for the reception of cartridge fuse-links, in accordance with Annex
DVB, National Electrical Code, NFPA 70 (for use in the USA), CSA C22.1–15 Canadian
Electrical Code, Part I (for use in Canada), and NOM-001-SEDE, Electrical Installations
(Utility) [for use in Mexico].
1.2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
IEC 60127-1:1998,
Miniature fuses – Part 1: Definitions for miniature fuses and general requirements for miniature fuse-links
IEC 60127-2:1989,
Miniature fuses – Part 2: Cartridge fuse-links
IEC 60216-1:2001,
Guide for the determination of thermal endurance properties of electrical insulating materials – Part 1:
General guidelines for ageing procedures and evaluation of test results
IEC 60695-2-2:1991,
Fire hazard testing – Part 2: Test methods – Section 2: Needle-flame test
Amendment 1 (1994)
IEC 60947-1:1999,
Low-voltage switchgear and controlgear – Part 7: General rules
Amendment 1 (2000)
Amendment 2 (2001)
IEC 60947-7-1:2002,
Low-voltage switchgear and controlgear – Part 7-1: Ancillary equipment – Terminal blocks for copper
conductors
ISO 3:1973,
Preferred numbers – Series of preferred numbers
ISO 4046:1978,
Paper, board, pulp and related terms – Vocabulary
1.2DV DR Modification by adding the following:
For a list of Canada, Mexico, and USA Normative Standards, see Annex DVA of this
standard.