UL 745-1
Portable Electric Tools

Edition Number:2SCC Approved:--
Edition Date:2007-06-15DOD Approved: --
Price Code:HANSI Approved: --


    1 Scope

    1.1 This standard applies to hand-held portable electric motor-operated or magnetically-driven tools, intended for indoor or outdoor use, in non-hazardous locations, in accordance with the Canadian Electric Code, Part 1 and the National Electrical Code (NFPA70). It applies to tools rated not more than 440V (not more than 250V for tools employing a universal motor).

    Hand-held electric motor-operated tools, hereinafter referred to as tools, which can be mounted on a support for use as fixed tools without any alteration of the tool itself, are within the scope of this standard.

    Tools with an electric heating element incorporated are within the scope of this standard, but such tools should also comply with IEC publication 335-1 :  Safety of Household and Similar Electric Appliances, Part 1: General Requirements, as far as it reasonably applies.

    Special requirements for battery-powered tools will be determined in Part 2. Requirements concerning mechanical safety, however, will also apply for these tools are defined in UL 745-3 and C22.2 No. 745-3.

    Special requirements for exchange type tools (see definition 2.2(16)) are under consideration. Moreover, the requirements of this standard apply where appropriate.

    For tools intended to be used on board ships or aircraft, additional requirements may be necessary, and in hazardous locations, for example, where explosions are liable to occur, special constructions may be required.

    For tools intended to be used in tropical countries, special requirements may be necessary.

    This standard applies to accessories and mechanical attachments for use with portable electric tools. These requirements are outlined in Appendix f.

    This standard applies to attachments that contain electrical and electronic components. In this case, the attachment shall be evaluated with the tool and a determination must be made as to which clauses apply.

    This Standard applies to, but the scope is not limited to: hand tools, such as drills, screwdrivers, nut runners, tappers, hammers, impact wrenches, saws, sanders, polishers, buffers, shears, nibblers, grinders, staplers, valve seat grinders and lappers, cylinder borers, and concrete vibrators; transportable tools, such as diamond core drills, drain cleaners, magnetic drills presses, pipe threaders, and pipe benders.

    This standard does not apply to fixed or stationary electric tools, gardening appliances, garage equipment, soldering irons or guns, painting equipment, floor-finishing machines, heat guns, or other equipment covered by individual requirements.

    Covered within this standard are Class I, II, and III tools.

    1.2 This standard is concerned with safety and takes into account the influence on safety of components necessary to achieve a required degree of radio and television interference suppression.

    Expand All

    • Cover
    • Transmittal
    • UL Harmonized Standard Title Page
    • Table of Contents
      • Body
        • 1 Scope
        • 2 Definitions
        • 3 General requirement
        • 4 General notes on tests
        • 5 Rating
        • 6 Classification
        • 7 Marking
        • 8 Protection against electric shock
        • 9 Starting
        • 10 Input and current
        • 11 Heating
        • 12 Leakage current
        • 13 Tools equipped with radio and television interference suppression
        • 14 Moisture resistance
        • 15 Insulation resistance and electric strength
        • 16 Endurance
        • 17 Abnormal operation
        • 18 Mechanical hazards
        • 19 Mechanical strength
        • 20 Construction
        • 21 Internal wiring
        • 22 Components
        • 23 Supply connection and external flexible cables and cords
        • 24 Terminals for external conductors
        • 25 Provision for earthing
        • 26 Screws and connections
        • 27 Creepage distances, clearances and distances through insulation
        • 28 Resistance to heat, fire and tracking
        • 29 Resistance to rusting
        • 30 Tests by Manufacturers
          • 30.1 Electric Strength Test
          • 30.2 Grounding Continuity Test
        • 31 Instructions
          • 31.3
    • Appendix A – Thermal cut-outs and overload releases
    • Appendix B – Electronic circuits
    • Appendix C – Construction of safety isolating transformers
    • Appendix D – Measurement of creepage distances and clearances
    • Appendix E – Reference standards
    • Appendix F – Attachments and accessories
    • Appendix G – Sequence of tests
    • Appendix H – Translations