IEC 60335-2-91:2008

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 General requirement
5 General conditions for the tests
6 Classification
7 Marking and instructions
8 Protection against access to live parts
9 Starting of motor-operated appliances
10 Power input and current
11 Heating
12 Void
13 Leakage current and electric strength at operating
   temperature
14 Transient overvoltages
15 Moisture resistance
16 Leakage current and electric strength
17 Overload protection of transformers and associated
   circuits
18 Endurance
19 Abnormal operation
20 Stability and mechanical hazards
21 Mechanical strength
22 Construction
23 Internal wiring
24 Components
25 Supply connection and external flexible cords
26 Terminals for external conductors
27 Provision for earthing
28 Screws and connections
29 Clearances, creepage distances and solid insulation
30 Resistance to heat and fire
31 Resistance to rusting
32 Radiation, toxicity and similar hazards
Annexes
Annex B (normative) - Appliances powered by rechargeable
        batteries
Annex D (normative) - Thermal motor protectors
Annex I (normative) - Motors having basic insulation that is
        inadequate for the rated voltage of the appliance
Annex AA (informative) - Safety signs and symbols which may
         be used on lawn trimmers and lawn edge trimmers
Annex BB (informative) - Vibration
Annex CC (informative) - Noise test code - Engineering
         method (grade 2)
Annex DD (informative) - Example of a material and
         construction fulfilling the requirements for
         an artificial surface
Annex EE (informative) - Safety instructions
Bibliography

IEC 60335-2-91:2008 deals with the safety of electric powered walk-behind and hand-held lawn trimmers and lawn edge trimmers, with cutting element(s) of non metallic filament line or freely pivoting non metallic cutter(s), with a kinetic energy of not more than 10 J each, used by a standing operator for cutting grass, their rated voltage being not more than 250 V for a.c. or 50 V d.c.. Main changes in this edition include the revised endurance test in Clause 18; Annex B, which allows for battery-powered trimmers; and addition of informative Annexes BB, CC and EE on vibration, noise and safety instructions.