Wiring And Testing Electrical Equipment And Circuits

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SEMPEO2-33 - SQA Unit Code FP3E 04Wiring and testing electrical equipment and circuitsOverviewThis standard covers a broad range of basic competences that you need towire up and test electrical equipment and circuits. It will prepare you for entryinto the engineering or manufacturing sectors, creating a progression betweeneducation and employment, or it will provide a basis for the development ofadditional skills and occupational competences in the working environment.The activities will include the wiring and termination of a range of cables, suchas single and multicore cables, screened cables, fire resistant and armouredcables. You will be required to make a variety of terminations and to connect arange of electrical components, such as switches/switchgear, distributionpanels, motors and starters, control systems, sensors and actuators, safetydevices, and luminaires.You will be required to select the appropriate tools, materials and equipment touse, based on the operations to be performed and the components to beconnected. You will be expected to use appropriate tools and techniques forthe wiring of the various electrical components and connectors that make upthe electrical system/circuit. In addition, you will be expected to make allnecessary electrical connections to the switches, relays, sensors/actuators andother devices, as appropriate to the equipment and circuit being produced. Thewiring and testing activities will include making all necessary checks andadjustments to the circuit, including continuity, polarity, insulation resistancevalues, and ensuring that the equipment functions to the specification.Your responsibilities will require you to comply with health and safetyrequirements and organisational policy and procedures for the wiring andtesting activities undertaken. You will need to take account of any potentialdifficulties or problems that may arise with the wiring and testing activities, orwith the tools and equipment used, and to seek appropriate help and advice indetermining and implementing a suitable solution. You will work under a highlevel of supervision, whilst taking responsibility for your own actions and for thequality and accuracy of the work that you carry out.Your underpinning knowledge will provide an understanding of your work, andwill enable you to apply appropriate electrical wiring and testing procedures andtechniques safely. You will understand the wiring and testing methods andprocedures used, and their application, and will know about the various cablesand components used to produce the circuits, to the required depth to provide asound basis for carrying out the activities to the required specification.You will understand the safety precautions required when carrying out theSEMPEO2-33 Wiring and testing electrical equipment and circuits1

SEMPEO2-33 - SQA Unit Code FP3E 04Wiring and testing electrical equipment and circuitswiring and testing activities, especially those for ensuring the safe isolation ofthe equipment and circuits produced. You will be required to demonstrate safeworking practices throughout, and will understand the responsibility you owe toyourself and others in the workplace.Specific Standard RequirementsIn order to prove your ability to combine different electrical assembly and wiringactivities, at least one of the electrical assemblies produced must be of asignificant nature, and must contain a minimum of five of the components listedin scope 3 plus five of the activities listed in scope 5.SEMPEO2-33 Wiring and testing electrical equipment and circuits2

SEMPEO2-33 - SQA Unit Code FP3E 04Wiring and testing electrical equipment and circuitsPerformancecriteriaYou must be able to:P1P2P3P4P5P6P7P8P9work safely at all times, complying with health and safety legislation,regulations and other relevant guidelinesplan the wiring and testing activities before you start themuse appropriate sources to obtain the required specifications, circuitdiagrams and test informationobtain the correct tools and equipment for the wiring and testingoperations, and check that they are in a safe and usable conditionmount and secure the electrical components safely and correctly, tomeet specification requirementsinstall and terminate the cables to the appropriate connections on thecomponentsuse appropriate test methods and equipment to check that the completedcircuit is safe and meets all aspects of the specificationdeal promptly and effectively with problems within your control, and seekhelp and guidance from the relevant people if you have problems thatyou cannot resolveleave the work area in a safe and tidy condition on completion of thewiring and testing activitiesSEMPEO2-33 Wiring and testing electrical equipment and circuits3

SEMPEO2-33 - SQA Unit Code FP3E 04Wiring and testing electrical equipment and circuitsKnowledge andunderstandingYou need to know the specific safety practices and procedures that you need to observewhen wiring and testing electrical equipment (including any specificlegislation, regulations or codes of practice for the activities, equipmentor materials)the hazards associated with wiring and testing electrical equipment, andwith the tools and equipment used, (such as using sharp instruments forstripping cable insulation), and how they can be minimisedthe importance of wearing appropriate protective clothing and equipment(PPE), and keeping the work area safe and tidywhat constitutes a hazardous voltage and how to recognise victims ofelectric shockhow to reduce the risks of a phase to earth shock (such as insulatedtools, rubber mating and isolating transformers)the interpretation of circuit diagrams, wiring diagrams, and other relevantspecifications (including BS and ISO schematics, wiring regulations,symbols and terminology)the basic principles of operation of the equipment/circuits beingproduced, and the purpose of the individual modules/components usedthe different types of cabling and their application (such as multicorecables, single core cables, solid and multi- stranded cables, steel wirearmoured (SWA), mineral insulated (MI), screened cables,data/communications cables, fibre-optics)the application and use of a range of electrical components (such asplugs, switches, sockets, lighting and fittings, junction boxes, consumerunits, relays, solenoids, transformers, sensors and actuators)the application and use of circuit protection equipment (such as fusesand other overload protection devices, trips, residual current device(RCD))how to check that components meet the required specification/operatingconditions (such as values, tolerance, current carrying capacity, voltagerating, power rating, working temperature range)methods of mounting and securing electrical equipment/components tovarious surfaces (such as the use of nuts and bolts, screws and masonryfixing devices)checking that the positions selected for mounting the components do notinterfere with or damage existing services (such as cable harnesses,pipework or electricity supplies)methods of laying in or drawing cables into conduit, trunking andtraywork systems, and the need to ensure the cables are not twisted orplaitedthe techniques used to terminate electrical equipment (such as plugs andSEMPEO2-33 Wiring and testing electrical equipment and circuits4

SEMPEO2-33 - SQA Unit Code FP3E 04Wiring and testing electrical equipment and sockets; soldering; screwed, clamped and crimped connections, glandsand sealed connectors)the use of BS7671/IET wiring regulations when selecting wires andcables and when carrying out tests on systemsmethods of attaching markers/labels to components or cables to assistwith identification (such as colour coding conductors, using coded tabs)the tools and equipment used in the wiring and testing activities(including the use of cable stripping tools, crimping tools, soldering ironsand torches, gland connecting tools)how to check that tools and equipment are free from damage or defects,and are in a safe, PAT tested, calibrated and usable conditionthe importance of conducting inspections and checks before connectingto the supply (such as visual examination for loose or exposedconductors, excessive solder or solder spikes which may allow shortcircuits to occur, strain on terminations, insufficient slack cable atterminations, continuity and polarity checks, insulation checks)the care, handling and application of electrical test and measuringinstruments (such as multimeter, insulation resistance tester, loopimpedance test instruments)applying approved test procedures; the safe working practices andprocedures required when carrying out the various tests, and the need touse suitably fused test probes and clipshow to identify suitable test points within the circuit, and how to positionthe test instruments into the circuit whilst ensuring the correct polarityand without damaging the circuit components and the test equipmenthow to set the instrument's zero readings; obtaining instrument readingsand comparing them with circuit parameterswhy electrical bonding/earthing is critical, and why it must be bothmechanically and electrically securethe problems that can occur with the wiring and testing operations, andhow these can be overcomethe fault-finding techniques to be used if the equipment fails to operatecorrectly (such as half split, unit substitution and input/output)when to act on your own initiative and when to seek help and advicefrom othersthe importance of leaving the work area in a safe and clean condition oncompletion of the wiring and testing activities (such as returning handtools and test equipment to is designated location, cleaning the workarea, and removing and disposing of waste)SEMPEO2-33 Wiring and testing electrical equipment and circuits5

SEMPEO2-33 - SQA Unit Code FP3E 04Wiring and testing electrical equipment and circuitsAdditional InformationScope/rangerelated toperformancecriteriaYou must be able to:1.Carry out all of the following activities during the wiring and testingactivities:1.1 adhere to procedures or systems in place for risk assessment,COSHH, personal protective equipment (PPE) and other relevantsafety regulations1.2 ensure the safe isolation of services during the wiring and testingactivities1.3 follow job instructions, circuit drawings and test procedures at alltimes1.4 check that tools and test instruments to be used are withincalibration date, and are in a safe and usable condition, includingPAT tested1.5 ensure that the electrical system is kept free from foreign objects,dirt or other contamination1.6 where appropriate, apply procedures and precautions to eliminateelectrostatic discharge (ESD) hazards1.7 return all tools and equipment to the correct location oncompletion of the wiring and testing activities2.Wire circuits using three of the following types of cables:2.1 single core2.2 data/communication2.3 ribbon cables2.4 multicore2.5 fibre-optics2.6 mineral insulated2.7 PVC twin and earth2.8 screened2.9 armoured2.10 flexible (such as cotton or rubber covered)2.11 coaxial2.12 wiring loom/harness3.Connect up ten of the following electrical modules/components toproduce circuits:3.1 isolators3.2 blowersSEMPEO2-33 Wiring and testing electrical equipment and circuits6

SEMPEO2-33 - SQA Unit Code FP3E 04Wiring and testing electrical equipment and 73.283.293.303.31cable connectorsswitcheslamp holdersfusessocketspanel lampscircuit breakerscontactorsluminairessensorsmotor startersballast chokesactuatorssolenoidsconsumer unitsjunction boxesrelaysresidual current device (RCD)terminal blocksalarm devicesinstrumentselectronic modules/unitsmotorstransformerscontrol devicespumpspanels or sub-assembliesheatersother electrical components4.Apply wiring methods and techniques to include six of the following:4.1 positioning and securing of equipment and components4.2 levelling and alignment of components4.3 determining current rating and lengths of cables required4.4 securing by using mechanical fixings (such as screws, nuts andbolts)4.5 laying in cables without twisting or plaiting4.6 feeding cables into conduit without twisting or plaiting4.7 leaving sufficient slack for termination and movement5.Carry out eight of the following cable termination activities:5.1 stripping cable sheaths without damage to conductor insulation5.2terminating mineral insulated cables5.3 removing cable insulation5.4 sealing/protecting cable connections5.5 connecting accessories (such as plugs, sockets multi-waySEMPEO2-33 Wiring and testing electrical equipment and circuits7

SEMPEO2-33 - SQA Unit Code FP3E 04Wiring and testing electrical equipment and attaching suitable cable identificationmaking mechanical/screwed/clamped connectionscrimping (such as spade end, loops, tags and pins)soldering and de-solderingsecuring wires and cables (such as clips, plastic strapping, lacing,harnessing)terminating armoured cablesheat shrinking (devices and boots)earth bondingcable glands and grips6.Wire up three of the following electrical systems:6.1 domestic lighting circuits6.2 air conditioning control circuits6.3 domestic power circuits6.4 refrigeration control circuits6.5 motor start and control6.6 heating/boiler control circuits6.7 vehicle heating or ventilating6.8 aircraft lighting circuits6.9 vehicle lighting6.10 power generation and control circuits6.11 vehicle starting and ignition6.12 avionic circuits and systems6.13 instrumentation and control circuits6.14 emergency lighting systems6.15 alarm systems (such as fire, intruder, process control)6.16 communication systems6.17 electro-pneumatic or electro-hydraulic control circuits6.18 computer systems6.19 other control circuits (such as pumps, fans, blowers, extractors)6.20 other specific electrical circuits7.Use two of the following test instruments during the wiring and testingactivities:7.1 multimeter7.2 earth-loop impedance tester7.3 insulation resistance tester7.4 polarity tester/indicator7.5 RCD tester7.6 other specific test equipment8.Carry out checks and adjustments, appropriate to the equipment andcircuits being wired, to include three of the following:SEMPEO2-33 Wiring and testing electrical equipment and circuits8

SEMPEO2-33 - SQA Unit Code FP3E 04Wiring and testing electrical equipment and circuits8.1making visual checks (such as completeness, signs of damage,incorrect termination)8.2movement checks (such as loose fittings and connections)8.3testing that the equipment operates to the circuit specification8.4carrying out fault finding techniques (such as half-split,input/output, unit substitution)Plus three more from the following:8.5protective conductor resistance values8.6load current8.7power rating8.8insulation resistance values8.9polarity8.10 frequency values8.11 continuity8.12 resistance8.13 inductance8.14 voltage levels8.15 capacitance8.16 RCD disconnection time8.17 specialised tests (such as speed, sound, light, temperature)9.Produce electrical circuits in accordance with one or more of thefollowing standards:9.1BS 7671/IET wiring regulations9.2other BS and/or ISO standards9.3company standards and proceduresSEMPEO2-33 Wiring and testing electrical equipment and circuits9

SEMPEO2-33 - SQA Unit Code FP3E 04Wiring and testing electrical equipment and circuitsDeveloped bySEMTAVersion number2Date approvedDecember 2011Indicative reviewdateDecember sationSEMTAOriginal URN33RelevantoccupationsEngineering and manufacturing technologies; Engineering;SuitePerforming Engineering Operations Suite 2Key wordsengineering, engineering operations, wiring electrical equipment, testingelectrical equipment, wiring circuits, testing circuits, manufacturing, cables,electrical components, connectorsSEMPEO2-33 Wiring and testing electrical equipment and circuits10

circuits to occur, strain on terminations, insufficient slack cable at terminations, continuity and polarity checks, insulation checks) K21 the care, handling and application of electrical test and measuring instruments (such as multimeter, insulation resistance tester, loop impedance test instruments) K22 applying approved test procedures; the safe working practices and procedures required .

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