%PDF-1.3 %туЯг 1 0 obj << /Creator (QuarkXPress’ 4.03) /CreationDate (D:20020322084854) /Subject (Safety in electrical testing: Servicing and\r repair of audio, TV and co\ mputer equipment) /Title (Safety in electrical testing: Servicing and\r repair of audio, TV and co\ mputer equipment) /Author (HSE) /Producer (Acrobat PDFWriter 4.05 for Power Macintosh) /Keywords (Safety in electrical testing, Servicing repair, audio, TV, computer, eng\ ineering,) /ModDate (D:20020417105800+01'00') >> endobj 2 0 obj [ /PDF /Text /ImageB /ImageC /ImageI ] endobj 3 0 obj << /Pages 5 0 R /Type /Catalog /DefaultGray 35 0 R /DefaultRGB 36 0 R >> endobj 4 0 obj << /Type /Page /Parent 5 0 R /Resources << /Font << /F1 6 0 R /F2 7 0 R /F3 9 0 R /F4 13 0 R >> /XObject << /I3 15 0 R >> /ProcSet 2 0 R >> /Contents [ 10 0 R 18 0 R ] >> endobj 5 0 obj << /Kids [ 4 0 R 20 0 R 25 0 R 28 0 R ] /Count 4 /Type /Pages /MediaBox [ 0 0 595 842 ] >> endobj 6 0 obj << /Type /Font /Subtype /TrueType /Name /F1 /BaseFont /Helvetica-Bold /Encoding /MacRomanEncoding >> endobj 7 0 obj << /Type /Font /Subtype /TrueType /Name /F2 /BaseFont /Helvetica /Encoding /MacRomanEncoding >> endobj 8 0 obj << /Type /FontDescriptor /FontName /Helvetica,Italic /Flags 32864 /FontBBox [ -256 -225 1025 775 ] /MissingWidth 278 /StemV 93 /StemH 62 /ItalicAngle -10 /CapHeight 718 /XHeight 531 /Ascent 775 /Descent -225 /Leading 0 /MaxWidth 1025 /AvgWidth 549 >> endobj 9 0 obj << /Type /Font /Subtype /TrueType /Name /F3 /BaseFont /Helvetica,Italic /FirstChar 0 /LastChar 255 /Widths [ 0 722 722 722 722 722 722 722 0 278 722 722 722 0 722 722 722 722 722 722 722 722 722 722 722 722 722 722 722 0 722 722 278 278 355 556 556 889 667 191 333 333 389 584 278 333 278 278 556 556 556 556 556 556 556 556 556 556 278 278 584 584 584 556 1015 667 667 722 722 667 611 778 722 278 500 667 556 833 722 778 667 778 722 667 611 722 667 944 667 667 611 278 278 278 469 556 333 556 556 500 556 556 278 556 556 222 222 500 222 833 556 556 556 556 333 500 278 556 500 722 500 500 500 334 260 334 584 722 667 667 722 667 722 778 722 556 556 556 556 556 556 500 556 556 556 556 278 278 278 278 556 556 556 556 556 556 556 556 556 556 556 400 556 556 556 350 537 611 737 737 1000 333 333 549 1000 778 713 549 549 549 556 576 494 713 823 549 274 370 365 768 889 611 611 333 584 549 556 549 612 556 556 1000 278 667 667 778 1000 944 556 1000 333 333 222 222 549 494 500 667 167 744 333 333 500 500 556 278 222 333 1000 667 667 667 667 667 278 278 278 278 778 778 790 778 722 722 722 278 333 333 333 333 333 333 333 333 333 333 ] /Encoding /MacRomanEncoding /FontDescriptor 8 0 R >> endobj 10 0 obj << /Length 11 0 R >> stream 0.25 w 2 J BT /F1 10 Tf 42.625 685.75 TD 0 Tc 0 Tw (What is this guidance about?)Tj /F2 10 Tf -0.108 -24 TD (This information sheet contains specific advice about)Tj 0.014 -12.25 TD (some of the ways of avoiding injury during the servicing)Tj 0.155 -12 TD (and repair of domestic audio, TV, computer and video)Tj -0.09 -12.25 TD (equipment. Other domestic appliances are dealt with in)Tj /F3 10 Tf -0.033 -12 TD (Safety in electrical testing:Servicing and repair of)Tj -0.029 -12 TD (domestic appliances.)Tj ET BT /F2 5.5 Tf 1.018 0 0 1.018 136.167 605 Tm (1)Tj ET BT /F2 10 Tf 141.976 601.25 TD (Further general advice is given in)Tj /F3 10 Tf -99.45 -12.25 TD (Safety in electrical testing at work:)Tj 154.177 0 TD (General guidance )Tj ET BT /F2 5.5 Tf 1.018 0 0 1.018 278.426 592.75 Tm (2)Tj ET BT /F2 10 Tf 42.735 577 TD (and other guidance on electrical safety listed under)Tj -0.052 -12.25 TD (\324Where can I)Tj 58.883 0 TD (get more information?\325 on page 3.)Tj /F1 10 Tf -58.964 -24 TD (How can injuries happen during testing?)Tj /F2 10 Tf 0.095 -24.25 TD (The most significant danger to people carrying out)Tj 0.042 -12.25 TD (electrical testing work is that they might suffer an electric)Tj -0.147 -12 TD (shock. Any simultaneous contact of a part of the body)Tj 0.108 -12 TD (with a conductor that is live at a dangerous voltage, eg)Tj 0.01 -12.25 TD (one that is connected to the mains supply, while another)Tj -0.207 -12 TD (part of the body is connected to an earth, will result in an)Tj 0.146 -12.25 TD (electric shock. There is also a risk of burn injuries)Tj -0.082 -12 TD (resulting from arcing when conductors are accidentally)Tj -0.02 -12 TD (short-circuited. )Tj 0.133 -24.25 TD (An electric shock can lead to serious injury, sometimes)Tj -0.119 -12.25 TD (fatal. Injuries can also occur when a person reacts to an)Tj 0.108 -12 TD (electric shock, for example by falling or touching another)Tj 0.075 -12 TD (hazard. Factors which are likely to increase the risk of)Tj -0.124 -12.25 TD (receiving an electric shock include the following:)Tj -0.109 -24.25 TD (\(a\))Tj 24.222 0 TD (Some equipment may have large areas of earthed)Tj -0.146 -12 TD (metal that can be easily touched. Touching)Tj 0.117 -12 TD (exposed live conductors connected to the mains)Tj -0.038 -12.25 TD (supply at the same time as touching the earthed)Tj -0.095 -12 TD (metalwork will result in an electric shock;)Tj -23.941 -24.25 TD (\(b\))Tj 23.972 0 TD (Some equipment may internally generate an)Tj -0.024 -12 TD (electrical supply which is earth-referenced.)Tj -0.025 -12.25 TD (Touching a live conductor of this supply at the)Tj 0.146 -12 TD (same time as an earthed conductor will result in an)Tj -0.138 -12.25 TD (electric shock;)Tj -23.896 -24 TD (\(c\))Tj 23.91 0 TD (Serious injury can also occur if accidental contact)Tj -0.058 -12.25 TD (is made with the two poles of a supply, whether the)Tj -0.015 -12 TD (supply is earth-referenced or not. In TVs, such)Tj 0.098 -12.25 TD (supplies are generated internally on printed circuit)Tj -0.066 -12 TD (boards and can be contacted if boards are handled)Tj -0.032 -12 TD (while live or before stored charges have dissipated;)Tj -23.901 -24.75 TD (\(d\))Tj 23.972 0 TD (Aerial sockets of satellite systems might not be)Tj 0.06 -12.5 TD (isolated from earth, thus introducing an earth)Tj -0.053 -12.5 TD (conductor into an area which was earth free. Also,)Tj 0.037 -12.5 TD (the introduction of telephone connections on test)Tj -0.099 -12.5 TD (benches might compromise the safety concepts of)Tj 263.334 643.25 TD (the test bench, as the modems fitted to some)Tj 0.051 -12.5 TD (receivers do not operate correctly when supplied)Tj -0.133 -12.5 TD (via an isolating transformer;)Tj -23.918 -24.75 TD (\(e\))Tj 23.972 0 TD (Some conductors may be small, with sharp edges.)Tj -0.063 -12.25 TD (A shock injury can become more severe if the)Tj 0.064 -12.5 TD (sharp end of a conductor penetrates the skin;)Tj -24.066 -24.75 TD (\(f\))Tj 24.188 0 TD (The use of Class I test instruments \(such as many)Tj 0.003 -12.5 TD (oscilloscopes\) when taking measurements of)Tj -0.016 -12.25 TD (dangerous voltages can increase the risk of injury if)Tj -0.156 -12.5 TD (they are used without the earth \(protective\))Tj 0.103 -12.5 TD (conductor connected. This can result in the metal)Tj -0.104 -12.25 TD (enclosure of the instrument becoming live at)Tj 0.159 -12.5 TD (dangerous voltages. Such use also defeats the)Tj -0.08 -12.25 TD (equipment manufacturer\325s primary protection)Tj -0.077 -12.5 TD (concept for Class I protection and should be)Tj 0.117 -12.5 TD (discouraged;)Tj -23.989 -24.75 TD (\(g\))Tj 23.972 0 TD (Work may be carried out in the customer\325s home,)Tj 0.111 -12.25 TD (so people other than those doing the work)Tj -0.01 -12.5 TD (\(including children\) may also be at risk;)Tj -24.148 -24.75 TD (\(h\))Tj 23.972 0 TD (Additional risks may be present at the customer\325s)Tj 0.126 -12.5 TD (premises if their electrical installation is not)Tj 0.021 -12.25 TD (electrically sound, eg earthing, insulation)Tj -0.143 -12.5 TD (resistance, polarity. )Tj /F1 10 Tf -23.824 -24.75 TD (Carrying out a risk assessment)Tj /F2 10 Tf -0.102 -24.75 TD (To help you to identify the precautions that are)Tj -0.066 -12.5 TD (necessary to carry out electrical testing work safely, you)Tj 0.074 -12.5 TD (need to do an assessment of the risk of injury posed by)Tj 0.085 -12.25 TD (the work being done. When assessing the risk, you need)Tj -0.047 -12.5 TD (to think about the hazards that are present, who may be)Tj -0.127 -12.25 TD (harmed and how, and the effectiveness of existing)Tj 0.108 -12.5 TD (precautions. Bear in mind the examples of factors given)Tj -0.01 -12.5 TD (within this guidance which might increase the risk. )Tj -0.006 -24.75 TD (When carrying out a risk assessment for electrical)Tj -0.115 -12.25 TD (testing, ask yourself the following questions:)Tj 0.107 -25 TD (\(a\))Tj 23.972 0 TD (Can the work be done with the equipment dead?)Tj -0.104 -12.25 TD (\(Repairs and replacements of faulty parts can and)Tj 0.23 -12.5 TD (should be done with the equipment isolated from)Tj -0.113 -12.25 TD (the supply. Remove the plug or fuse supplying the)Tj 0.052 -12.5 TD (equipment \(if the fuse is removed, steps should be)Tj -0.043 -12.5 TD (taken to prevent another person inadvertently)Tj -0.01 -12.25 TD (replacing it\). 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However, some modern equipment)Tj -0.015 -12 TD (may have built-in facilities which allow safer and)Tj 0.069 -12 TD (easier diagnostic testing, fault-finding and)Tj 0.004 -12 TD (adjustments to be done by the service worker.)Tj -0.006 -12 TD (These servicing facilities may involve visual)Tj 0.045 -12 TD (indication and/or displays built into the equipment)Tj -0.028 -12 TD (and may allow more efficient servicing because of)Tj -0.086 -12 TD (built-in software.\))Tj -23.862 -24 TD (\(c\))Tj 23.91 0 TD (Have suitable precautions been taken to avoid)Tj -0.113 -12 TD (danger and, where necessary, prevent injury? )Tj -23.826 -24 TD (\(d\))Tj 23.972 0 TD (Is the person doing the work competent for that)Tj 0.009 -12 TD (type of work, or, if not, adequately supervised?)Tj /F1 10 Tf -23.968 -24 TD (What precautions should I take?)Tj /F2 10 Tf -0.094 -24 TD (Where possible, the work should be done with the)Tj -0.066 -12 TD (equipment dead \(this is a requirement of the Electricity)Tj -0.02 -12 TD (at Work Regulations 1989)Tj ET BT /F2 5.5 Tf 1.018 0 0 1.018 157.325 496.25 Tm (3)Tj ET BT /F2 10 Tf 160.634 492.5 TD (\). Otherwise, adequate)Tj -118.083 -12 TD (precautions, which should be identified in your risk)Tj 0.15 -12 TD (assessment, must be taken to ensure safety. )Tj -0.039 -24 TD (The following precautions are recommended as part of a)Tj -0.113 -12 TD (safe system of working for electrical testing of this)Tj 0.088 -12 TD (equipment.)Tj /F5 10 Tf -0.022 -24 TD (Test areas)Tj /F2 10 Tf -0.022 -24 TD (In all circumstances, it is necessary to create a safe)Tj -0.072 -12 TD (working environment for testing. A test area, in which)Tj 0.084 -12 TD (the work is to be done, should be defined. This should)Tj 0.071 -12 TD (be relatively straightforward in a workshop situation, but)Tj -0.015 -12 TD (may be more difficult when working in a customer\325s)Tj -0.049 -12 TD (home.)Tj /F3 10 Tf 0.043 -24 TD (In the customer\325s home)Tj /F2 10 Tf -0.064 -24 TD (When working in a customer\325s home, the person)Tj -0.011 -12 TD (carrying out the testing should do a site risk assessment)Tj -0.043 -12 TD (to determine the steps necessary to create a safe)Tj 0.009 -12 TD (working environment: )Tj 0.101 -24 TD (\(a\))Tj 23.972 0 TD (If you do not think it is safe to work in the home,)Tj -0.029 -12 TD (don\325t. Remove the equipment to the workshop)Tj 0.009 -12 TD (where you can work safely;)Tj -23.89 -24 TD (\(b\))Tj 23.972 0 TD (Consider erecting a temporary barrier to prevent)Tj -0.067 -12 TD (unauthorised people approaching the danger area;)Tj -23.881 -24 TD (\(c\))Tj 23.91 0 TD (Make sure that everyone in the home is aware of)Tj -0.024 -12 TD (the dangers arising from the testing work, and that)Tj 0.094 -12 TD (they follow any precautions that are necessary. Ask)Tj -0.104 -12 TD (for children and pets to be kept from the test area; )Tj -23.958 -24.25 TD (\(d\))Tj 23.972 0 TD (Allow plenty of space to work in - if you do get a)Tj -0.029 -12.25 TD (shock you may be less able to break contact)Tj 263.272 720.5 TD (quickly, if at all, or are more likely to hit something,)Tj -0.077 -12.25 TD (when working in a cramped area. Remove \(or)Tj 0.064 -12.25 TD (move away from\) any objects that may pose a)Tj -0.021 -12.25 TD (hazard. For example, if an appliance such as a TV)Tj 0.146 -12 TD (is situated in a corner, consider pulling it out and)Tj 0.014 -12.25 TD (working behind it; )Tj -24.121 -24.5 TD (\(e\))Tj 23.972 0 TD (Never leave equipment unattended when it is in a)Tj 0.028 -12.25 TD (dangerous condition \(eg with live conductors)Tj 0.089 -12 TD (exposed\).)Tj /F3 10 Tf -24.084 -24.5 TD (In the workshop)Tj /F2 10 Tf 0.096 -24.5 TD (When testing is being done in a workshop, the following)Tj 0.01 -12 TD (precautions should be considered:)Tj -0.176 -24.5 TD (\(a\))Tj 23.972 0 TD (Access to the test area should be limited as far as)Tj 0.169 -12.25 TD (is practicable to the competent persons carrying)Tj -0.171 -12.25 TD (out the testing. Suitable barriers may be provided)Tj 0.15 -12 TD (to help prevent unauthorised entry. Competent)Tj -0.01 -12.25 TD (persons must have adequate knowledge of the)Tj -0.137 -12.25 TD (electrical dangers associated with the equipment)Tj 0.179 -12.25 TD (and the precautions necessary to reduce the risk of)Tj -0.203 -12.25 TD (electric shock. Training must be provided as)Tj 0.088 -12 TD (necessary;)Tj -23.896 -24.5 TD (\(b\))Tj 23.972 0 TD (Other people who may enter the test area from)Tj 0.079 -12.25 TD (time to time should be instructed about the hazards)Tj -0.203 -12.25 TD (that may be present and should in particular be told)Tj 0.113 -12 TD (not to touch anything on the workbench. 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