IEE REGULATIONS PDF
Guide to the Wiring Regulations. 17th Edition IEE Wiring Regulations (BS ). Darrell Locke IEng MIEE ACIBSE. Electrical Contractors' Association. IEE Wiring Regulations Inspection, Testing and Certification By the same DOWNLOAD PDF CONTENTS Preface Introduction: the IEE Wiring Regulations. 16th Edition IEE Wiring Regulations. Explained & Illustrated. Brian Scaddan 7th Edition. Used alongside the regulations themselves, this book is the key to safe.
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It is not a guide to the Regulations or a replacement for them; nor does it seek to interpret them Regulation by Regulation. It should, in fact, be read in conjunction . 17th Edition. IEE Wiring Regulations: Design and Verification of Electrical. Installations. Seventh Edition. Brian Scaddan, IEng, MIET. AMSTERDAM • BOSTON. “Give and Take is brimming with life-changing insights. “One of the great secrets of life is that those who win mo 17th Edition IEE Wiring Regulations.
That part of a fuse: A flammable I r material is o: I[Q whicb. A box forming.. Joint 00'1. Apparatus which distributes" filters o. Point blwiring. Ute use of hard'wood such as beech.. S and tl. A mecha. The' mn:! A device int. I NGTE. ThroughOut taese ReplaooRs. Resistuce area for: A Iuminaire track system to B. TM2 or 6 tuB. Space fadliir. The followillg ranges of nominal voltage r.
Band I N ormaUy not exceeding conductors or to earth. A fabricated casin g for cables. Voltage Nom. I AND. AU electrical conductors shall be of sufficient size and current rafing for the purposes forwhich they are to be used. NTS WQrk. WhcrC' metalwork. ShaH be inserted in Ii conductor connec.
Dl1tsjde Grea.. Cln exposed to weather. Jht from the supply undertakinvg nat ' he c supply conforms to requirements comespo. Effective means. It VO. Of 9' In a situation which may nermally be wet ordamp.
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17th Edition IEE Wiring Regulations
S lea. E NOTE. PART n W. NTS Co: Ui rs 'Of 'f'a Note '2. C'otle of Pr. The means of excess-current -p: NOoTE a. Section A. U comprise either a fuse: Q thrs. The supply undertakioJi's. Qg fuses. Qillles-tic instaHatroWls. I See diagrams.. Db Ccmsu. Wh WiaU. B Throughout a 2-wir 6 installation ennneeted to a souece. P'p'iy under- 00 takJn. IO E'lfttmptioo: Regulation A. The current rating of. This does not preclude the Ilaked devices. Of m 'motor circuits complying wit.
II Where cables not exceeding 2 m in I. Si of fuse. Uon5 made by 'the maker of the fuse. S deleted by' rile. Ap'l'll '6 Amendments.
J5Each distribu. These fimre8 rel'ftls: Every switch or c. I'Whet'e terminals 0[" lither fixed Jive parts between whIch a: Every item of. To facili'tate disconnection 20 l. Fin"J iiiub-cln: Jrnm each other by. Pendix I. Z4 [tom of eaeh final sub--cir.
IZC of ci. With a. AilS The number 0 ' points whi'ch may be supplied by a final subcircuit of rating not exceeding 15 'amperes is limited by their aggregate demand as determined.: S33 pifovidcd that: Britis h S'tanda: May be neglected.
Lng or an. For the purpose of this reguhHiotl the following Items rn'ay each be regarded as one point. BJhl1'Ve pr-ov]sion for fuses in. NOTE 3. U ary cooking appliances i.!
I nQl: Not more than. The total eurrent demand of p. Non-fused spun shall have a current. Jt shall not serve an area of more than Or ill metal. V'i N "? Il' I. Each soeset-outlet shan be ofthe type: NO'I E. Each socket-cutlet shall be of the type that will accept onJy 2: Hoofs IHl requirements of Regulations t exceeding I j amperes.
Dr alternativety. S sockes- tii! Jc 1Fi00ldomes! See B. Jamps to Iifl. The rating at the fuse shan not exceed that of the cable forming the spu r of pOInts. The total current demand by a fused spur shall nOI[ Icxl.! Stir seeker-outlet. AilSa An.
For an appliance fitted with heating elements which can be 'touched Dr into which. The switch required b, R,egularion A.. Sa ttuty be in! Dce or lumin;airce can be d. Any' conductors orcables,whlch. The lI. Dltm;, When: Brtakj g sho u ld. Nng and. S1,1I b: I9-Unn A. Q n agaln. Choke of conductof. Fla mmabmll: Segtega tlon tl f ei rcuits. EU25 Specht I requirements for consumers' undergnlnnd wlrin,g between buildings; etc, ,, 8. R UJ-I ;9 Special reqairemenrs for he: OI wiltS and.
J'ld "on!. OF p having a h Any of the types of cablesheathed. Jtions lof taese: This requ tremel1 t.. Busbars and busbar connections on switchboards shall. NOll-armoured p. December 1' Braided travellingcables for Hfts 0. II S An 'cables. Et] I. S"tiOQ'1' B. The lype of insulation..
Uwl' wtron5 of a. Such rubber insu]aticdfkxible cables and. This regulation does nat apply to a flexible cord forminl part of 11 portable appl. Il9 Single-core c: I J Fle. Twisted twin noa-sheathedr fer the wiring o: AVO sed to be of a.
J and flexTble cords in normal use are I"Te[J I r- '8. Al PnJ. U conductors and cables shall be adequately protected against any risk of med1o. Where a cabJe 'traverses a wooden jo. S made for diversity In accordance wIth Regu'fa. J the declared or OIOD1 inal o voltage when.: B may be necessary 1.
J'rs form ing' part of [he equipment of switchboards shall comply as regards:. Flexible cables and flexible t. Roors or above ceilings: Th is regulation d oes not ap'ply to pos ltlons e. H less than the apprhpriete value stated in Table B. U be taken to avotd risk of mechanical damage to the cables duri ag haodling see also Rlegu: Cables of Ijft in stallatiens.
IEE Wiring Regulations 14th Edn
Nun-metal-sheathed cables installed in positions duct o: Table R. Copper 0. Nen-arttmured copper or s.
J'r p. TABLE 8. I Col. Q til! Forflexible cords used as pendants. Barriers againsr. Fur rubber. S ill for a rubber.! SILl ppnrt shall not exceed ]. For cables sheathed with rubber.
For gUlidance c. For a cable Installed in a heated rloor or other heated p: For cables of the lypes described in J terns [i and iji of Regulario n n.
Ii Lead-sheathed. J hig. Hi 'Minera t-insulated CD pper -sheathed: R"f39 lf it i'iii necessary toinstall cables in asituation where flamm. Keflil to th:. CQntmuous exposure uf P. J8 Tcrmmations cf rnineral-trrsu lated cables shal [be provided witb sleeves haying a temperature rating similar to that of the seals The use of heat-r.
SIJC may. Cloud uits or eond ueto rs are ins tailed in ehaanels. This regulation doesnot. If a run ccnduit must pass from a danger area to a safe area. R cabi In damp situ. Armoured pl. Code con t. J Cables having a seamless aluminium sheath. N orIE'. Parts E and 2. A6 For the purposes of Regulations B.. Y fixed screens orbarriers. Category 2 circuits. Fire-alarm circuits. Category 1 ci..
With the exception of fire-alarm circuits. T are containcdi in: C'p 3: CP HL'R ' additi. Where term in. JJ of Idel1lifi'!: F'GIi PnJ! Y circumstances be contained in: J corn men m ul tieore cable. J ai 10w vQ. I voided. CDl'e cable rO. In preparing eopperelad aluminium conductors for cennection to. The colQur com binatlon green and ye.. SJ 7'Ul. Y Any scheme of colouring used in a. Regulation oth.. IS an altf'rn. For armoured p. A] or by painting w-ith moee coleurs. Cop pe rei ad. PLE H. A 'Colour i.
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Colour idel'l.. Dr three-Dhase. Q'[ or ea hie cpre.!! ThiS regulation insulated cables. Ir tbe bi[uecere is!. BA51 and Regula. DId '! Operation of RCDs. Prospective fault current. Earth electrode resistance. Manual operation of RCDs. Protection by separation of circuits. Insulation of non-conducting floors and walls.
This could be so simple. As it is, periodic inspection and testing tends to be complicated and frustrating. On the domestic scene, I doubt if any house owner actually decides to have a regular inspection. It is usually only when there is a change of ownership that the mortgage companies insist on an electrical survey. The worst cases are, however, industry and commerce.
Periodic inspections are requested, reluctantly, to satisfy insurers or an impending visit by the HSE. Under the rare circumstances when an inspection and test is genuinely requested it is difficult to convince the client that, as there are no drawings, or information about the installation, and that no switchgear is labelled etc.
If it is felt that it may be unsafe to continue with the inspection and test, then drawings and information must be produced in order to avoid contravening the Health and Safety at Work Act Section 6.
A periodic inspection and test under these circumstances should be relatively easy, as little dismantling of the installation will be necessary, and the bulk of the work will be inspection.
Inspection should be carried out with the supply disconnected as it may be necessary to gain access to wiring in enclosures etc. This is also the case when testing protective conductors, as these must never be disconnected unless the supply can be isolated. This is particularly important for main equipotential bonding conductors which need to be disconnected in order to measure Ze. In general an inspection should reveal: As was mentioned earlier, dismantling should be kept to a minimum and hence a certain amount of sampling will take place.
From the testing point of view, not all of the tests carried out on the initial inspection may need to be applied. This decision depends on the condition of the installation. The continuity of protective conductors is clearly important as is insulation resistance and loop impedance, but one wonders if polarity tests are necessary if the installation has remained undisturbed since the last inspection.
The same applies to ring circuit continuity as the P—N test is applied to detect interconnections in the ring, which would not happen on their own.
It should be noted that if an installation is effectively supervised in normal use, then Periodic Inspection and Testing can be replaced by regular maintenance by skilled persons.
This would only apply to, say, factory installations where there are permanent maintenance staff. This is done on electrical installation certificates, inspection schedules, test schedules, test result schedules, periodic inspection and test reports, minor works certificates and any other documentation you wish to append to the foregoing.
This documentation is vitally important. It has to be correct and signed or authenticated by a competent person. Electrical installation certificates and periodic reports must be accompanied by a schedule of test results and an inspection schedule for them to be valid. It should be noted that three signatures are required on an electrical installation certificate, one in respect of the design, one in respect of the construction and one in respect of the inspection and test.
For larger installations there may be more than one designer, hence the certificate has space for two signatures, i. It could be, of course, that for a very small company, one person signs all three parts.
Whatever the case, the original must be given to the person ordering the work, and a duplicate retained by the contractor. One important aspect of the electrical installation certificate is the recommended interval between inspections.
This should be evaluated by the designer and will depend on the type of 61 Certification installation and its usage. In some cases the time interval is mandatory, especially where environments are subject to use by the public.
Guidance Notes 3 give recommended maximum frequencies between inspections. A periodic report form is very similar in part to an electrical installation certificate in respect of details of the installation, i. The rest of the form deals with the extent and limitations of the inspection and test, recommendations, and a summary of the installation.
The record of the extent and limitations of the inspection is very important. It must be agreed with the client or other third party exactly what parts of the installation will be covered by the report and those that will not. The interval until the next test is determined by the inspector.
With regard to the schedule of test results, test values should be recorded unadjusted, any compensation for temperature etc. Any alterations or additions to an installation will be subject to the issue of an electrical installation certificate, except where the addition is, say, a single point added to an existing circuit, then the work is subject to the issue of a minor works certificate. What are these stages? State the test voltages to be applied and the minimum acceptable value of insulation resistance in each case: You are to carry out an initial verification of that installation.
State if the readings for each socket are Figure A1 66 Appendix A Sample paper satisfactory and give reasons for those readings you feel are unsatisfactory. Explain your reasons. Explain why this is, and how the problem may be overcome in order to conduct the test. Disconnect the supply to the PIR controlled lights and the electronic door sensor. Disconnect the capacitor and ballast at each fluorescent luminaire. With the garage main switch and the MCBs ON and any accessories 73 Appendix B Suggested solutions to sample paper unplugged, test at V between live conductors connected together and earth and then between each live conductor.
Operate the two-way switches during each test. The test readings should not be less than 0. The loop impedance in such cases will have to be determined by a combination of measurement and calculation as follows: The bulk of the original BS remains unaffected and the changes will not significantly effect the work of the electrical operative. The feel and look apart from the colour of the new edition is unchanged and the extent of additions, amendments and re-written regulations etc.
So, as the story teller says, let us begin at the beginning! Part 1: Scope, object and fundamental principals The whole of the original Part 1 has been re-written, rearranged etc. These outline the general requirements for Design , Selection of electrical equipment and Erection and Inspection and Testing of installations Part 2: Protective conductor current replaces Earth leakage current and is defined as Electric current which flows in a protective conductor under normal operating conditions.
Leakage current on the other hand flows, under normal operating conditions, in an unwanted conductive path e. Part 3: Assessment of general characteristics This part remains unchanged with the exception of Regulation Compatibility, where there are some small editorial changes and the addition of Power factor, Undervoltage and Unbalanced loads to the list of harmful effects.
Part 4: Protection for safety This part contains by far the most amendments and additions and include: Changes to Loop impedance tables. Change of pvc to Thermoplastic and the addition of Thermosetting to rubber cables. A new chapter on Overvoltage. New regulations regarding conductors in parallel. A new chapter regarding Protective measures as a function of external influences. In table 43A and elsewhere in BS, pvc has been replaced by Thermoplastic pvc and rubber is now shown as Thermosetting rubber.
New Chapter 44 Protection against Overvoltage. This outlines the requirements for protecting electrical installations against overvoltages due to switching surges or from an atmospheric origin lightning!! Tables 44A and 44B give examples of equipment that withstand voltages and the categories of equipment.
It is unlikely that this chapter will be of any real significance in the UK, as most equipment used is to a relevant British Standard, and the number of thunderstorm days anywhere are unlikely to exceed 25 per year.
New Chapter 48 Choice of protective measures as a function of External Influences. This chapter deals with protection where there is a risk of fire due to the nature of processed or stored materials , and in locations with combustible constructional materials Part 5: Selection and erection There are few significant changes in this part, most are editorial or re-written sentences. Part 6: Special installations or locations The changes in this part are mainly editorial with a few additions.
Bathrooms etc The old AMD 3 has been incorporated with one or two minor amendments.
Section Construction sites etc. There are three new regulations and 03 which give greater detail of the scope of this section and which indicates the requirements for the selection of flexible cables i. High protective conductor current installations Whilst this section has been completely re-written the content is generally unchanged. Where the protective conductor current is likely to exceed 10 mA, the requirement for two separate protective conductor terminals in BS EN plugs has been deleted but where high integrity protective conductors and connections are required accessories must have two earthing terminals.
Highway power supplies etc. Once again this section is generally unchanged with only one new regulation which requires a degree of protection for all electrical equipment of IP Regulation has been added to with the requirements that access doors less than 2. Regulation also requires the use of a tool to remove barriers or enclosures to gain access to light sources of luminaires located less than 2.
Part 7: Inspection and testing Not a great deal of change here, just 2 new regulations and some modifications. It is now required that for an initial verification, every installation be inspected and tested during and on completion.
New regulation requires that the Prospective short circuit current and Prospective earth fault current at the origin and at other relevant points be ascertained by measurement, calculation or other method. New regulation concerns Periodic Inspection and Testing and suggests that this may be replaced by an adequate regime of monitoring and maintenance provided this is carried out by skilled persons, and that the installation is under effective supervision.
Both Electrical Installation Certificates and Periodic Test Reports must be accompanied by a schedule of test results and an inspection schedule. New regulation requires every circuit to be identified on a schedule of test results. Appendices Appendix 1 and 2 have been updated with regards to new and amended standards and revised and new legislation.
Appendix 4 Current ratings etc. Appendix 6 now includes samples of inspection and test schedules. Read more. Electrical Bundle: Explained and Illustrated, Sixth Edition Newnes.
Guidance Note 3: Inspection and Testing Iee Guidence Notes. Electrical Wiring Simplified. Newnes Industrial Control Wiring Guide. Newnes Electrical Engineer's Handbook. Newnes electrical pocket book. Newnes electrical engineer's handbook. Toyota Prius - Electrical Wiring. Electrical Wiring Residential. Electrical Wiring Handbook. Electrical Wiring Commercial.
Portable Appliance Testing, Second Edition: Requirements for Electrical Installations: Newnes electrical power engineer's handbook. Toyota - Rav4 - Electrical Wiring Diagrams. Electrical Power Equipment Maintenance and Testing,.
Regulations that are absolute must be conformed to at all cost, whereas those that are reasonably practicable are conformed to, provided that all reasonable steps have been taken to ensure safety.
For the contravention of an absolute requirement, Regulation 29 is available as a defence in the event of criminal prosecution, provided the accused can demonstrate that they took all reasonable and diligent steps to prevent danger or injury. No one wants to end up in court accused of negligence, and so we need to be sure that we know what we are doing when we are inspecting and testing.
Apart from the knowledge required competently to carry out the verification process, the person conducting the inspection and test, must be in possession of test instruments appropriate to the duty required of them.
Instruments In order to fulfil the basic requirements for testing to BS , the following instruments are needed: 1 2 3 4 5 6 7 A low-resistance ohm-meter continuity tester. An insulation resistance tester. A loop impedance tester. An RCD tester.
A prospective short circuit current PSCC tester. An approved test lamp or voltage indicator. A proving unit. However, regardless of the various combinations, let us take a closer look at the individual test instrument requirements.
I use this example as an illustration, as it is based on a real experience of testing the continuity of a 10 mm2 main bonding conductor between gas and water services. The services, some 10 m apart, were at either ends of a domestic premises. The 10 mm2 conductor, connected to both services, disappeared under the floor, and a measurement between both ends indicated a resistance higher than expected.
Further investigation revealed, that just under the floor at each end, the 10 mm2 conductor had been terminated in a connector block and the join between the two, about 8 m, had been wired with a 1 mm2 conductor. Only a milli-ohmmeter would have detected such a fault. A low resistance ohm-meter should have a no-load source voltage of between 4 V and 24 V, and be capable of delivering an AC or DC short circuit voltage of not less than mA.
It should have a resolution i. The instrument should only allow an earth fault to exist for a maximum of 40 ms, and a resolution of 0. Above this circuit rating, the ohmic values become too small to give such accuracy using a standard instrument, and more specialized equipment may be required. The test instrument should not be operated for longer than 2 seconds, and it should have a 10 per cent accuracy across the full range of test currents.
A typical approved test lamp is as shown in Figure 1. The Health and Safety Executive, Guidance Note 38, recommend that the leads and probes associated with test lamps, voltage indicators, voltmeters etc. Proving unit This is an optional item of test equipment, in that test lamps should be proved on a known supply which could, of course, be an 22 An overview Figure 1. However, to prove a test lamp on such a known supply may involve entry into enclosures with the associated hazards that such entry could bring.
A proving unit is a compact device not much larger than a cigarette packet, which is capable of electronically developing V DC across which the test lamp may be proved.
The exception to this are test lamps incorporating V lamps which will not activate from the small power source of the proving unit. Test lamps must be proved against a voltage similar to that to be tested.
Hence, proving test lamps that incorporate an internal check i. This does not restrict such maintenance to just a yearly calibration, but requires equipment to be kept in good condition in order that it is safe to use at all times.Regldntions tot dte Eleetrim1 Eq!!.
U be taken to avotd risk of mechanical damage to the cables duri ag haodling see also Rlegu: IJJ ColQ ttl t. Fehmary 19,74Amemlmellts The ,am,enmnen: S JU'iopcr. Information required Assessment of general characteristics sections , and together with information such as drawings, charts etc.