26 Provision for earthing
26.1 Accessible metal parts of class I tools, which may become live in the event of an insulation fault,
shall be permanently and reliably connected to an earthing terminal or termination within the tool, or to
the earthing contact of the tool inlet.
The printed conductors of printed circuit boards shall not be used to provide continuity of the protective
earthing circuit.
Earthing terminals and earthing contacts shall not be electrically connected to the neutral terminal.
Class II and class III tools shall have no provision for earthing.
If accessible metal parts are screened from live parts by metal parts which are connected to the earthing
terminal or termination, or to the earthing contact, they are not, for the purpose of this requirement,
regarded as likely to become live in the event of an insulation fault.
Accessible metal parts, which are separated from live parts by double insulation or by reinforced
insulation, are not considered likely to become live in the event of an insulation fault.
Metal parts behind a decorative cover which does not withstand the test of clause 20 are considered to
be accessible metal parts.
Compliance is checked by inspection.
26.2 The clamping means of earthing terminals shall be adequately locked against accidental loosening,
and it shall not be possible to loosen them without the aid of a tool. Screw clamping terminals complying
with clause 25 or screwless terminals in accordance with IEC 60998-2-2 are considered to comply with
the requirements of this clause.
For specially prepared cords, terminals complying with IEC 60760 are considered to comply with the
requirements of this clause.
Compliance is checked by inspection, by manual test and, for screwless terminals, by the tests specified
in IEC 60998-2-2.
Dostları ilə paylaş: 
