Page 686 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)
P. 686
The City & Guilds Textbook: Plumbing Book 1
drilling 122–3, 324 Electricity at Work (EAW) open-vented hot water systems
ductility 154 Regulations 1989 6–7 428–9
dust 21, 29 electricity supply 44–5, 644–51 feed and expansion cistern 448,
duty holders 7, 10, 13 earthing systems 648 503
see also employer duties isolation procedure 49–51, ferrous metals 151
dynamic pressure 176 659–64 ferrous oxide 155–6
earthing 7, 193–4, 648 electrolyte 156–7 fibreglass 21
elbows 103, 108 electrolytic corrosion 481–2 files 85
electric cable 44 electromotive force (EMF) 188 filling loop 477, 503–4
electric shock 40, 43–4, 665 electron flow 184–5 filters, drinking water 322–3
electric storage heaters 436, 505 emergency maintenance 333 filtration 250–2
electrical employee responsibilities 3, 13 final fix 134
circuits 185–6, 190–4, 647 employer duties 2–5, 7, 13, 34–5 fire
conductivity 155, 188 employment contract 209 classes of 59
equipment 4, 6–7, 46 end feed 98, 103 combustion 58–9
flow 185–7 energy equipment signage 20
hazards 43–9 calculations 171–2 extinguishers 59–60
installations 45–6 efficiency 354 fighting 60
resistivity 188 unit of measurement 166 safety 58–60
electrical components 651–8 engineers 200 fireclays 153
faults 664–5 Environment Agency 241 firestopping pipework 138
electrical services inspector environmental impact 354 first aid 33–42
205–6 equal tees 103, 108 burns 36
electrical systems Equality Act 2010 210–11 cardiopulmonary resuscitation
documentation 643–4 equilibrium 182–3 (CPR) 40–1
protection methods 650–1 equipment cuts 35–6
spurs 655–7 electrical 658–9 electric shock 40
testing procedures 659–60 hand tools 77–86 exposure to fumes 37–8
wiring 653–4 health and safety 85–6, 88–9 fractures 38–9
see also electricity supply power tools 88–90 objects in eye 36–7
electricians, job role 204 storing 124–5 recovery position 41–2
electricity equipotential bonding 50–1, 194 unconsciousness 39–40
alternating current (AC) 187, erosion corrosion 157 first fix 133–4, 224
645–6 estimates 208 fittings
amperage 186 estimator 202 capillary 98–9
capacitance 184 European Norm number 643 compression 99–100, 103, 109,
charge 184 evaporation 167 110
conductance 184 excavations 72–4 connectors 103–4
current 183, 185–7 expansion vessels 396–400, couplings 103, 108
current and fuse size 651 475–6, 499 elbows 103, 108
direct current (DC) 187, 644–5 exposure to fumes 37–8 end feed 98, 103
electrical flow 185–7 eyes equal tees 103, 108
Ohm’s law 186, 188–90 objects in 36–7 fusion-welded 111
power 186 protection 28–9 integral solder ring 98, 103
principles of 184–90 Fahrenheit 166 malleable iron 107–8
resistance 184, 186 fan convectors 471 manifolds 103–4
units of measurement 183–4, faults press-fit 101–2, 103
185–6 central heating systems 513–14 proprietary 117
voltage 183, 185–6
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