Summary of Topics This is the Third edition of ansi/ul 60745-1, the Standard for Safety for Hand-Held Motor- operated Electric Tools – Safety – Part 1: General Requirements and is based on iec 60745-1

MARCH 26, 2004
CAN/CSA-C22.2 NO. 60745-1-04
♦
UL 60745-1
66
Copyright Underwriters Laboratories Inc. 
Provided by IHS under license with UL
Licensee=CSA Group/5934117001, User=YUEN, Ruby
Not for Resale, 12/21/2004 21:51:39 MST
No reproduction or networking permitted without license from IHS
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21.33 For class II tools, capacitors shall not be connected to accessible metal parts, and their casings, if
of metal, shall be separated from accessible metal parts by supplementary insulation.
This requirement does not apply to capacitors complying with the requirements for protective impedance
specified in 9.1 and 21.36.
Compliance is checked by inspection and by the tests specified for supplementary insulation.
21.34 Capacitors shall not be connected between the contacts of a thermal cut-out.
Compliance is checked by inspection.
21.35 Lampholders shall be used only for the connection of lamps.
Compliance is checked by inspection.
21.36 Protective impedance shall consist of at least two separate components, the impedance of which
is unlikely to change significantly during the lifetime of the tool. If any one of the components is
short-circuited or open-circuited, the values specified in 9.1 shall not be exceeded.
Resistors complying with 14.1 of IEC 60065 and capacitors complying with 14.2 of IEC 60065 are
considered to comply with this requirement.
Compliance is checked by inspection and by measurement.
21.37 Air-intake openings shall not enable the ingress of foreign bodies that could impair the safety.
Compliance is checked by the following test.
It shall not be possible to insert a steel ball of 6 mm diameter through the air intake opening other than
those adjacent to the fan.