1. Safe work practices such as risk assessment and permitting are required to safely isolate circuits before working on electrical systems. The electrician must be qualified and take precautions to prevent hazards. 2. When finding a fault, the electrician should explain to the client what needs to be isolated and the estimated time, then explain how the fault will be fixed once found. 3. The client should be informed of any circuit issues in a clear manner, treated with respect to maintain good relations, and given accurate information to avoid wasted costs or false beliefs about the electrician's abilities.

4. 1. Safe isolationisrequiredtoensure anyone workingonthe circuitsare safe fromelectric
shock.Riskassessmentof the jobshouldbe done toensure all correctpreventionshave
beenputinplace to preventhazards.A permitto workshouldalsobe signedtoensure the
electricianisfullycapableandknowswhats/he knowswhatisneededtobe done ina safe
manner.
2. An agreementof whatneedstobe isolatedwithanestimatedtime itcouldtake.Once the
faultisfoundit shouldbe explainedtothe clientwithinformationonhow youare goingto
fix it.
3.
a. Everythingshouldbe explainedclearlytoensure the clientunderstandswhatis
goingon intheirproperty.
b. You musttreat themrespectivelytoensure youhave ahigherchance of future work
withthese clients.
c. You wantto be accurate toreduce cost of wastedproductsandto ensure youdon’t
give the clientfalse informationwhichcouldmake thembelieve youdon’tactually
knowwhatyou’re doing.✔
4. The clientshouldbe informedwhichcircuithasa problemandthat itneedsisolating.After
isolationthe till canbe placedina temporarylocationsothe store can still trade.(Unless
done duringclosinghours).The areayouare workinginthenneedstobe closedoff fromthe
publicviabarriers.
5. A visual checkonyour consumerunittocheck forany visible loseorworncables.Thenyou
wouldisolate the circuitwithaproblemandthendothe continuityandinsulationresistance
teststo testfor opencircuitandhighresistance withthe low resistance ohmmeterandthen
testfor shortcircuit or lowresistance withaninsulationresistance meter.
6.
a. If the RCBO onlytripswhenthe switchisturnedonthisindicatedthe faultisinthe
switch.Thiscouldbe due to the humidair causingcondensationtogatherinthe
back box causinga short circuitbetweenlineandcpc.
b. If the lightsdon’tturnoff withthe designedswitchthenthiscouldindicate a
possible faultyswitch. Orafaulton the switchwire.✔
7.
a. A highresistance readingcouldmeanthe cable hasn’tbeen tightlyterminated
properlyata socketor the circuitbreaker.
b. A lightningstickcouldcause ahighspike of voltage toflow throughthe circuits.
c. Havingto manyitemspluggedintoaradial circuitwhichtotal to more thanthe
ratingof the cable and circuitbreakercouldcause the circuitto overload.
8.
a. Terminalsmightnotbe tightenedenoughwhichcouldcause eitherahighresistance
or an opencircuitdue to the cablescominglose.
b. If several circuitsare all on at once a highamountof current will be passingthrough
the consumerunit. If the current istoo highforthe mainswitchto handle itwill trip
due to overload.
9.
a. Whenlone workingnoone knowswhere youare and soif you getintotrouble no
one will be able tohelpyou.Forexample fallingfromaladderandsprainingyour

5. ankle. Thiscouldbe preventedbyworkingwithanothercontractoror bytellinga
memberof staff where youare and yourexpectedreturntime.
b. All hazardsshouldbe safelymovedoutthe wayorcoveredand heldbya barrierto
reduce riskto the contractor fromfallingortrip hazards.Personal protective
equipmentshouldalsobe wornforexample hardhatstoreduce injury.
c. Fibre opticcablesshouldonlybe handledwhileusingglovesdue tothe cable being
made of shardsof glass.Alsothe terminatingendmustbe keptawayfromthe eye
due to the laserpossiblydamagingyoureye.
d. Electricdevisesshouldbe unpluggedfromthe circuittoensure youdon’tgetfalse
readingswhentestingforfaults.
e. IT equipmentwouldbe destroyedwhenyouuse aninsulationresistance meteron
the circuitwhile theyare pluggedin.Theyshouldall be unpluggedbefore testing.
f. Capacitorsneedtobe fullydischargedotherwise it couldcause damage tothe
testingequipment.
10. Usinga voltage indicatorandtestingbetweenline andcpc,neutral andcpc, andline and
neutral.✔
11.
a. Line and neutral conductorare switched.Thiscanbe testedbyvisuallycheckingthe
line andneutral are inthe correct terminalsinthe consumerunit.
b. Thiscouldbe due to the machine eitherhavingnovoltage poweringit.Orit couldbe
a faultymachine.Tocheckif itis gettinganyvoltage youshouldtestacrossall 3
pointsonthe machinessupplysocket/switch.If novoltage ispresentitcouldmean
the socketisn’tconnectedtothe supply.
c. Usinga phase rotationtestertestacrossall 3 phases.If the meterdoesn’tshow L1-
L2-L3 thenit needstohave the phase putin the correct terminal.
12. Missinginsulationdue toRodentsorweather
Overheatingof cable causinginsulationtomelt
Cable notcomplyingwithbuildingregulations
Lose connectionsattermination✔
If its insulationwasmissinginasmall sectionof the cable due to rodentsorweather thenit
couldeasilybe repaired,butif itisa massive lengthof cable missinginsulationitwouldbe
easiertoreplace the entire cable.If the cable isoverheatingitwill needreplacingwitha
cable capable of carrying the designcurrenttostop itoverheating.If the cablesdon’tcomply
withregulationstheymustbe replacedasyouwouldn’tknow if theyare trulysafe touse.If
lose connectionsinthe terminal thenmostlikelyitjustneedstightening.
13.
a. Code C1 – Danger Present.
Code C2 – PotentiallyDangerous.
Code C3 – RecommendedImprovement.
b. C1 isthe worst ratingwhichcouldcause harm to anyone unknowingaboutthe
problem. I.e.alive cable danglingoutof trunkingwhichisable tobe pulledbya
person givingthemanelectricshock.
C2 isfor risksthatcould cause dangerinthe nearfuture.Forexample acrackedplug
socket.It’ssafe to use fornow butit couldeventuallycause harmtothe user.✔

6. C3 isfor thingsyoubelieve shouldbe changedbutthere isnorush forit. i.e.anold
greenbondingconductor.It’snotto today’sstandardsbutit isstill safe.✔
14. Dust sheetscouldbe usedtoprotectthe floorfrompaintand otherfallenobjects.i.e.
strippedcable waste.Sweepingwhereyouhave beenworkingwillalsoensure the areais
safe to walkaround.Plasterboardandotherdangerousitemsmustbe disposedof inasafe
mannerby takingthemtothe correct waste treatmentsite.✔