Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM

INDEX A H.V. distribution systems & system transformers B Unit MV distribution system (3,3/11 KV) C Unit LV distribution system (220/380 V) D DC power supplies & distribution system E Auxiliary supplies F Station 3,3 KV power supplies G 380 V station H Open loop control & alarm & protection system boards & cubicles I Structures J Closed loop control and measuring system boards and cubicles K Junction boxes L Desks & panels for unit control room & local control operator desks & engineer desks M Communications equipment & electrical metering N Boilers P Fuel handling Q Spare R Water / steam system S Steam turbine & generator T Operating maintenance general U Conventional auxiliaries V Circulating water system W Ash plant X Spare Y Civil works Z Civil works

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM UNIT 01 Unit 1 02 Unit 2 03 Unit 3 04 Unit 4 05 Unit 5 06 Unit 6 STATION 10 West 15 North East 20 East 25 North West 30 South 35 South East 40 North 45 South West 50 Station: For items which are only partly divisible under 10 - 40 51 Water treatment plant ancillary equipment 60 LV & MV distribution system for coal plant 61 Ash plant equipment

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM A H.V. DISTRIBUTION SYSTEM & SYSTEM TRANSFORMER AA 275/800 KV Busbar AB Line & earth links AC Current voltage transformers AD Bus section breaker AE Feeder breaker AF Gen 275/400 breaker AG Busbar links AH Current transformers AJ 275/800 KV line traps AK Lighting / surge arresters AL Busbar earth links AM Metering AN Generator reverse power AP Generator breaker AQ Line links AR Generator Busbar earthing resistor AS Bus coupler breaker AT Generator transformer and H.V. breaker AU Air breaker compressors AV Feeders AW Earthing resistors AX Spare AY Unit isolators & earthing switch AZ General H.V. yard B UNIT MV DISTRIBUTION SYSTEM (3,3 / 11 KV) BA 11 KV Unit board A BB 11 KV Unit board B BC Station & Unit service transformers BD 3,3 KV Service board A BE 3,3 KV Service board B BF Spare BG 3,3 KV Service board C BH 3,3 KV Service board D BJ 3,3 KV Unit diesel generator board BK Spare BL Unit diesel generator & related equipment BM Station diesel generator & related equipment BN Spare BP Spare BQ Coal stockyard sub-station BR Earthing resistors BS Spare

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM BT Unit transformers BU Spare BV Spare BW Spare BX Spare BY Spare BZ Spare C UNIT LV DISTRIBUTION SYSTEM (220/380 V) CA 380 V Unit board A CB 380 V Unit board B CC 380 V Welding plugs/ socket outlets CD Spare CE 380 V Unit lighting board CF 380 V Unit lighting board (essential-supply) CG 380 V Unit diesel generator board CH 380 V Ash bunker board C (Tutuka)

380 V Miscellaneous distribution board (Lethabo) CJ 380 V CW Unit board A CK 380 V CW Unit board B CL 380 V Precipitator board A CM 380 V Precipitator board B CN 380 V Fuel oil plant board A CP 380 V Fuel oil plant board B CQ 380 V Ash bunker board A 1,3,5 Unit CR 380 V Ash bunker board A 2,4,6 Unit CS 380 V Unit standby board CT 380 V Dust handling board (1A-6A) (Lethabo) CU 380 V Dust handling board (1B-6B) (Lethabo) CV 380 V Unit coarse Ash board A (Tutuka) CW 380 V Unit coarse Ash board B (Tutuka) CX Miscellaneous 380 V unit lighting sub-boards CY 380 V Unit diesel generator control panel/boards (3,3 KV beaker

Tutuka) CZ Uninterruptable power supply (Lethabo) D DC POWER SUPPLIES & DISTRIBUTION SYSTEM DA 220 V DC station board 1 DB 220 V DC station board 2 DC 220 V Station & unit uninterruptable fuse boxes DD Spare DE 220 V DC station battery/charger 1/batteries (Lethabo) DF 220 V DC station battery/charger 2/batteries (Lethabo)

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM DG 220 V DC sub station battery/charger/battery tripping units DH Miscellaneous DC distribution board & station control DC

supplies DJ 220 V DC unit board A DK 220 V DC unit board B DL 220 V DC unit board C DM 24/48 V DC unit board A DN 24/48 V DC unit board B DP 220 V Unit battery/charger DQ 24 V Unit battery/charger A1+ DR 24 V Unit battery/charger A2- DS 24 V Unit battery/charger B1+ DT 24 V Unit battery/charger B2- E AUXILIARY SUPPLIES EA Miscellaneous 11 KV boards EB Miscellaneous 11 KV boards EC Miscellaneous 11 KV boards ED Miscellaneous 11 KV boards EE Miscellaneous 11 KV boards EF Miscellaneous 11 KV boards EG Miscellaneous 11 KV boards EH Miscellaneous 11 KV boards EJ Miscellaneous 11 KV boards EK 88 KV – 132 KV Breaker EL 88 KV – 132 KV Line isolator (including 11 KV Tutuka) EM Spare EN Spare EP Distribution boxes (hoppers/heaters/precipitators) ER Station earthing resistor ES Mini-subs ET Station transformers, Neutral earthing compensator, earthing EU 24-48 V Power supply unit and battery outside plant control station sub-station supply EV 11 KV Station dam pump house EW Spare EX Spare EY H.T. sets (precipitators, station & unit diesel generator sets) etc EZ Inverter/uninterruptable power supply general (unit) F STATION 3,3 KV POWER SUPPLIES FA Miscellaneous 3,3 KV boards FB Miscellaneous 3,3 KV boards

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM FC Miscellaneous 3,3 KV boards FD Miscellaneous 3,3 KV boards FE Miscellaneous 3,3 KV boards FF Miscellaneous 3,3 KV boards FG Miscellaneous 3,3 KV boards FH Miscellaneous 3,3 KV boards FJ Miscellaneous 3,3 KV boards FK Miscellaneous 3,3 KV boards FM Spare FN Spare FP Spare FQ Spare FR Spare FS Spare FT Spare FU Spare FV Spare FW Spare FX Spare FY Spare FZ Spare G 380 V STATION GA Miscellaneous 380 V boards GB Miscellaneous 380 V boards GC Miscellaneous 380 V boards GD Miscellaneous 380 V boards GE Miscellaneous 380 V boards GF Miscellaneous 380 V boards GG Miscellaneous 380 V boards GH Miscellaneous 380 V boards GJ Miscellaneous 380 V boards GK Miscellaneous 380 V boards GL Miscellaneous 380 V boards GM Miscellaneous 380 V boards GN Miscellaneous 380 V boards GP Miscellaneous 380 V boards GQ Miscellaneous 380 V boards GR Miscellaneous 380 V boards GS Miscellaneous 380 V boards GT 380/380 dyn. 11 Transformers GU Miscellaneous 380 V boards GV Miscellaneous 380 V boards GW Spare GX 380 V Miscellaneous station lighting sub-boards

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM GY Miscellaneous 380 V boards GZ Miscellaneous 380 V boards H OPEN LOOP CONTROL, ALARM & PROTECTION SYSTEM BOARDS & SUBICLES HA Interlock logic HB Sequence control HC Contact conversion HD Drive control HE Alarm system, stops computer HF Local alarm panels HG Generator relay panels/ HV relay panel HH Hydrastep HI Automatic voltage regulator & generator excitation HJ Master clock and other clocks HK Generator breaker HL Interface (computer & burner) HM Metering & measurement HN Unit station bus-zone protection/ service transformer differential panels HP Turbine & boiler feed pump turbine & feed pump protection HQ Coal plant PLC cubicles HR Fire protection alarm cubicle HS Sootblower control HT Fuel oil heating control panels HU Computer, binary inputs & analogue inputs & station alarm input/output printers HV Boiler flame monitor/Peabody oil burner common cubicle HW Water plant HX Boiler H.P. auxiliary (bypass safety) HY Ash plant (including precipitator programmable logic control cubicles) HZ Boiler fuel auxiliary, local burner control I STRUCTURES IA Water plant structures IB Fire station/ medical centre IC Chimneys (Lethabo) ID Fuel plant structures IE Turbine house structures IF Boiler house structures IG Auxiliary structures IH H.V. yard structures

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM II Workshop structures IJ Lighting masts IK L.P. services structures IL Security structures IM Stores IN Outside plant control room structure (Lethabo) IO Laboratory structures IP Recreation centres IQ Churches IR Training centre IS Administrative structure IT Schools IU Consulting room IV Canteens IW Accommodation white IX Accommodation coloured IY Accommodation black IZ Change rooms & toilets (if separate) J CLOSED LOOP CONTROL AND MEASURING SYSTEM BOARDS & CUBICLES JA Auxiliary analog control JB Boiler control JC Summator (analog) JD 220 V AC power distribution JE Auxiliary analog control contactor cubicles JF Boiler analog control contactor cubicles JG Generator JH HP bypass control cubicle JJ Programmable logic control (Interlocking) JK Spare JL Limit valve monitor JM Measurements/ Data acquisition and peripherals JN Spare JP Turbine and boiler feed pump turbine protection JQ Spare JR Spare JS Spare JT Electro hydraulic governer & turbine supervisory equipment JU Turbine and boiler feed pump local cubicles JV Spare JW Water plant JX Spare JY Computer standard peripherals JZ Spare

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM K JUNCTION BOXES KA Boiler auxiliaries KB Boiler plant KC Feed heating/ condensate/ feedwater KD Welding plugs/ socket outlets (Tutuka) KE Electrical – unit supply KF Fire detection and alarm system (Lethabo) KG Generator and transformer KH H.V. yard KI Ash stacker KJ Outside plant control system KK Coal handling plant KL Lighting KM Communications KN Water treatment plant (Local control stations) KO Cranes KP Water treatment plant (Local solenoid operated valve panels) KQ Water treatment (Local control and instrumentation metering panels) KR Dust handling plant (Lethabo) LP services junction boxes (Tutuka) KS Sootblowers KT Main turbine KU Boiler feed pump turbine KV Cooling water plant KW Water plant KX Station electrical KY Ash plant/ dust handling plant KZ Water supply L DESKS & PANELS FOR UNIT CONTROL ROOM & LOCAL CONTROL OPERATOR DESKS & ENGINEER DESKS LA Desk LB Panel excluding grids LC Panel grid 1 LD Panel grid 2 LE Panel grid 3 LF Local control station (control panels for fire pumps) LG Disc storage unit & disc drive all types (Lethabo) LH Electric mimic panel (live & dead) LJ Electric operator desk LK Station recorder panels LL Manual syncronization & voltage selector panels

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM LM Printers LN Station plant control panel LP Station plant mimic LQ Key cabinets (station/ units/ outside plants) LR Outside plant control system (control desk Lethabo) storage cabinets (Tutuka) temperature & humidity record (Lethabo) LS Outside plant control system (Auxiliary plant panels) LT Local control stations coal outside plant control station LU Local control station ash plant (Lethabo) unit computer uninterruptable power supply & coarse ash junction boxes &

local control station (Tutuka) LV Outside plant control station control desk fuel oil (Tutuka) local control station low pressure services/ cooling plant (Lethabo) LW Local control station fuel oil plant unit & stations (Lethabo) LX Local control station dust handling plant (Lethabo) LY Local control station/ mimic panels/ control desks (ash stacker) LZ Unit control room audible alarm M COMMUNICATIONS EQUIPMENT & ELECTRICAL METERING MA MV/HV alarm system MB Communication equipment cabinet (Lethabo) MC Access control system (Door monitor turnstiles etc.) MD Spare ME Electrical metering (Communications) MG Spare MH Telephone hooters/ boxes (Tutuka) MJ Spare MK Spare ML Intermediate distribution frame supply MM Scald equipment cabinet (Lethabo) radio transformer cubicle (Ash stacking sub-station/ sub-station east-Tutuka) MN Scald intermediate distribution frame MP Power supplies MQ Wire communications, telemetry cabinets MR Radio communications MS MV/HV supervisory MT Telephone distribution frame MU Station uninterruptable power supply MV 220 V Distribution boards (Tutuka) 220 V AC metering distribution board (Lethabo) MW Station distribution frame MX Main distribution frame MY Unit distribution frame MZ Intermediate distribution frame (Tutuka)

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM N BOILERS NA High pressure system NB Circulating system / auxiliary start-up lines NC Drains and vents ND Spare NE Reheat NF Second reheat NG Air supply NH Flue gas, air heaters NJ Separately-heated air heater NK Lighting-up equipment NL Oil firing equipment NM Coal firing equipment (mill air vapour, dust extraction – Tutuka) NN Gas firing equipment NP Coarse ash return (under burners) NQ Flue gas cleaning NR Flue gas extraction NS Secondary air system NT Fly ash return (electrostatic precipitators) NU Ash and slag removal & transport NV Heating surface cleaning NW Spray water NX Cost collection (Lethabo) NY Spare NZ Auxiliary boiler (donkey boiler) P FUEL HANDLING PA Coal unloading & storage PB Coal preparation & transport PC Coal conveyor belts (terrace coal conveyor plant Tutuka) PD Fuel oil storage PE Fuel oil supply / metering PF Trace heating panel-fuel plant up to unit (Tutuka) boiler including

(Lethabo) PG Gas (Lethabo gas/trace heating panel on units – Tutuka) PH Coal hoppers PI Coal transfer house PJ Dust extraction & filtering PK Gates (on coal chutes) PL Winches & hoists PM Coal and oil metering/sampling PN Coal crushers PP Coal plant magnet separation equipment PQ Coal stockyard sub-station PR Reversible belt conveyor

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM PS Coal silos PT Coal belt tripper PU Spare PV Coal feeder PW Wash/spray/sluice water PX Coal chain conveyor PY Coal bucket conveyor PZ Coal stacker reclaimer R WATER/ STEAM SYSTEM RA Initial steam line, HP bypass RB Hot reheat line, LP bypass RC Cold reheat line RD Spare for second reheat RE Spare for second reheat RF HP extractions RG Spare RH LP extractions RJ Spare RK Drain from start-up flush tank RL Feedwater transfer (HP) RM Main condensate (Tutuka) RN Auxiliary condensate transfer/drain (LP feedwater) RP Auxiliary condensate transfer/drain (HP feedwater) RQ Auxiliary steam equipment RR Spare RS Spare RT Piping drains (not including in other groups) RU Drain and return systems RV Spare RW Bled steam turbine condensate transfer RX Spare RY Spare RZ Metering S STEAM TURBINE & GENERATOR SA Turbine casing SB Turbine bearing SC Oil system SD Condensate system SE Governing and protection equipment SF Bypass SG Glad steam system SH Drain system

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM SJ Control fluid system SK Compressed air system SL Push button on turbine/generator end (Tutuka) SM Gearing SN Turbine SO Shared equipment for turbine and generator SP Generator (stator, rotor/cooling system) SQ generator bearings SR Exciter (including cooling system) SS Water supply (direct water cooling including secondary cooling

circuit) ST Hydrogen supply SU Sealing oil system SV Condenser cleaning equipment (Lethabo) SW CO2 system (Lethabo) SX Spare SY Spare T OPERATING MAINTENANCE GENERATOR TA Outage TB Training TC General TD Unit start up U CONVERNTIONAL AUXILIARIES UA Filtration plant UB Boiler feedwater make-up demineralisation plant UC condensate polishing/generation plant UD Resin transfer system UE Chemical storage and dilution equipment UF Condensate chemical conditioning & unit sampling system UG Demineralisation reticulation UH Effluent recover and re-use, sludge disposal UJ Cranes & hoists UK Potable reticulation UL Turbine lubrication oil storage & regeneration UM Diesel fuel supply for standby equipment UN Effluent concentration plant UP Evaporator plant UQ Sewerage plant general UR General service water system US Control and service air system/air conditioning & ventilation UT Lifts UU Extinguishing system (not water) UV Vacuum cleaning system

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM UW Used oil collection and storage UX Fire detection and alarm system UY Fire water system UZ Sampling system V COOLING WATER SYSTEM VA Raw water supply VB Process & potable water treatment & cooling water clarification

plant VC Station cooling water system, excl. concentrated circulation

water VD Unit auxiliary cooling water system, boiler/turbine (inhibited demineralised water) VF Secondary cooling water system (Turbine) VG Spare VH Flue gas supply to water treatment plant for cooling water recarbonation) VJ Unit sampling cooling VK Spare VL Hoists/cranes in cooling water pump house VM Metering VN Spare VP Spare VQ Spare VR Dirty water dam VS Spare VT Cooling towers VU Spare VV Spare VW Spare VX Spare VY Spare VZ Cooling water plant general W ASH PLANT WA Conveyor-in-pit ash dump, ash unloading & storage (Lethabo) WB Ash preparation & transport WC conveyor belt – mixed ash WD Drag ling scraper – coarse ash WE Conveyor belts – coarse ahs WF Conveyor belts – fly ash WG Pneumatic ash transport WH Ash hopper WI Ash transfer house WJ Dust extraction & filtering

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM WK Gates on ash chutes WL Winches & hoists WM Ash metering WN Ash crushers (clinker) WO Ash scraper link conveyor WP Fly ash air slide WQ Fly ash aeration devices WR Compressed air WS Ash silos/bunkers WT Ash belt tripper WU Ash conditioner WV Ash feeder WW Wash/spray/sluice water/ash water supply WX Fly ash mechanical conveyor WY Fly ash bucket conveyor WZ Ash stacker Y CIVIL WORKS YA Transformer yards YB Switchgear buildings YC Radio repeater structures YD Dust suppression structures YE Ash plant structures & civil works YF Coal plant structures & civil works YG Pump stations YH Spare YJ H2 plant structures YK Spare YL Spare YM Diesel generator structure YN LP distribution pump house, LP gas YP Spare YQ Sewage plant structures YR Spare YS Fire & foam station, fire control pump house YT Auxiliary boiler YU Spare YV Spare YW Spare YX Spare YY Cable tunnels YZ Dog kennels Z CIVIL WORKS ZA Production equipment (general)

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM ZB Recreation buildings & facilities ZC Main air conditioning plant ZD Dams & reservoirs ZE Beacons, boreholes & inspection shafts ZF Mobile equipment ZG Service stations, post office, shops etc ZH Township electrical system ZI office furniture and equipment ZM First aid service ZO Gardens and sport fields ZR Roads, drains and airstrips ZS Domestic furniture and equipment ZT Township water supply ZV Interdenominational church halls ZX Stores ZY Fencing ZZ Earth mats / earth boxes GROUP DESIGNATION ORDINAL SECTION C4 (NB: FOR JUCNTION BOXES SEE SECTION UNDER JUNCTION BOXES) A Analytical measurement (chemical analysis, PH valve, conductivity) B Breakers, switchgear, contactors, fused switches, tap changers C Control, closed loop and regulating, sub-distribution and penetration (kiosks, junction boxes etc) D Drives, prime mover and driven machinery (pumps, fans, compressors, diesel engines, motor generator sets, agitators, not actuators) E Measurement of electrical quantities F Flow and quantity rate measurement G Pressure elements (tanks, pipe work, filters, inline mixer) H Pipe hangers I Ladders, scaffolding J Indicators & gauges (on control panels, desks, mimics) transformer tap indicator) K Protection device & earthing switch & isolators, bushings, VT’s and CT’s, earthing resistors L Level measurement M Special measurement (TV monitors, flame monitors, humidity measurement, etc) N Telephones/call lamps/booths/hooters (Tutuka) safety showers & eye baths (Lethabo) P Pressure measurement, including differential pressure Q Portable electrical appliances hoists/lifts and test equipment (Tutuka) R Radiation

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM S Valves, positioning devices with actuator, also manually operated, complete with position measurement T Temperature measurement & AC/DC power supplies U Signal processing from interlock or automatic systems V Fire fighting & first aid equipment trace heating element box (Tutuka) W Electrical power devices (i.e. heaters, 3 points) non rotating power distribution, humidifier X Workshop machines and lifting equipment winches/ hoists/ crawls (Lethabo) Y Speed and rotation measurement Z Expansion eccentricity, thrusts and vibration measurement JUNCTION BOXES FOLLOW A DIFFERENT CODING FOR ODRINDAL SECTION C4 AS FOLLOWS A Analog-control associated B Binary-drive associated C Binary-contacts F Termination H 220V DC L Low voltage 60V M Analog measurement P Power distribution S Supervisory T Cold junction boxes ALPHA/NUMERIC CODES FOR STATION HV & LV EQUIPMENT Alpha/Numeric Title 00EA 11 kV Black quarters board A (Lethabo) 10EA 11 kV Effluent plant board A (Tutuka) 20EA 11 kV Sub-station east board A 30EA 11 kV Sub-station south board A 40EA 11 kV Sub-station north board A 50EA 11 kV Station board a 60EA 11 kV Coal & ash plant board A 00EB 11 kV Black quarters board B (Lethabo) 10EB 11 kV Effluent plant board B (Tutuka) 20EB 11 kV Sub-station east board B 30EB 11 kV Sub-station south board B 40EB 11 kV Sub-station north board B 50EB 11 kV Station board 2 60EB 11 kV Coal & ash plant board B

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM 00EC ) 10EC 3,3 kV Effluent plant board A (Tutuka) 20EC 11 kV Ash stacking board A (Tutuka) 30EC ) 40EC ) 50EC 11 kV Single quarters board A 60EC 11 kV Ash conveyor boards 1 00ED ) 10ED 3,3 kV Effluent plant board B (Tutuka) 20ED 11 kV Ash stacking board B (Tutuka) 30ED ) 40ED ) 50ED 11 kV Single quarters board B 60ED 11 kV Ash conveyor board 2 00ET ) 10ET ) 20ET ) 30ET ) 40ET ) 50ET ) 60ET ) 00FA ) 10FA ) 20FA ) 30FA 3,3 kV Incline conveyor board A (Lethabo) 40FA 3,3 kV Station transformer socket outlets 50FA 3,3 kV Station services board A (1) 60FA 3,3 kV Coal & Ash plant board 1A (A-Tutuka) 00FB ) 10FB ) 20FB ) 30FB 3,3 kV Incline conveyor board B 40FB 3,3 kV Generator & unit transformers socket outlets

Units 1&2 50FB 3,3 kV Station services board B (2 Tutuka) 60FB 3,3 kV Coal & Ash plant board 1B (B-Tutuka) 00FC ) 10FC ) 20FC 3,3 kV Overland ash conveyor board A (Tutuka) 30FC ) 40FC 3,3 kV Generator & unit transformers socket outlets Units 3 & 4

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM 50FC 3,3 kV Station diesel generator board (Lethabo) 60FC 3,3 kV Coal & Ash plant board 2A (A-Tutuka) 3,3 kV Ash conveyor board 1A (Lethabo) 00FD ) 10FD ) 20FD 3,3 kV Overland ash conveyor board B (Tutuka) 30FD ) 40FD 3,3 kV Generator & unit transformers socket outlets Units 5 & 6 50FD 3,3 kV Effluent concentration plant board A (Lethabo) 60FD 3,3 kV Coal & Ash silos board 2B (Tutuka) 3,3 kV Ash conveyor board 1B (Lethabo) 00FE ) 10FE ) 20FE ) 30FE ) 40FE ) 50FE 3,3 kV Effluent concentration plant board B (Lethabo) 60FE 3,3 kV Ash conveyor board 2A (Lethabo) 00FF ) 10FF ) 20FF ) 30FF ) 40FF ) 50FF 3,3 kV Station generator board (Lethabo) 60FF 3,3 kV Ash conveyor board 2B (Lethabo) 00FG ) 10FG ) 20FG ) 30FG ) 40FG ) 50FG ) 60FG 3,3 kV Ash conveyor board 3A (Lethabo) 00FH ) 10FH ) 20FH ) 30FH ) 40FH ) 50FH ) 60FH 3,3 kV Ash conveyor board 3B (Lethabo)

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM 00FJ ) 10FJ ) 20FJ ) 30FJ ) 40FJ ) 50FJ 11 kV Coal stockyard substation board (CS-SS-6) (Lethabo) 60FJ 3,3 kV Ash conveyor board 4A (Lethabo) board 4 3,3 kV Ash conveyor board 4B (Tutuka) 00GA ) 10GA ) 20GA 380V Sub-station & cooling water pump house east board A 30GA 380V Sub-station south board A 40GA 380V Admin block board A 50GA 380V Fire control pump house board A (1 Tutuka) 51GA 380V Raw water pump house board A (Lethabo) 60GA 380V Incline conveyor board 1A 61GA 380V Station dam pump house board 00GB ) 10GB ) 20GB 380V Sub-station & cooling water pump house east board B 30GB 380V Sub-station south board B 40GB 380V Admin block board B 50GB 380V Fire control pump house board B (2 Tutuka) 51GB 380V Raw water pump house board B (Lethabo) 60GB 380V Incline conveyor board 1B 61GB 380V Station dam pump house board 4 (Lethabo) 00EE ) 10EE ) 20EE 3,3 kV Ash stacking board A (Tutuka) 30EE ) 40EE ) 50EE 11 kV Single quarters ring main unit 60EE 11 kV Ash conveyor boards 3 00EF ) 10EF ) 20EF 3,3 kV Ash stacking board B (Tutuka) 30EF ) 40EF ) 50EF 3,3 kV Station diesel Gen board (Tutuka) 60EF 11 kV Station dam pump house board (Lethabo)

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM 00EG ) 10EG ) 20EG ) 30EG ) 40EG ) 50EG 11 kV Effluent concentration plant board A (Lethabo) 60EG 11 kV Ash conveyor O/H lines 00EH ) 10EH ) 20EH ) 30EH ) 40EH ) 50EH 11 kV Effluent concentration plant board B (Lethabo) 60EH 11 kV Coal stockyard sub-station & camps 00GC ) 10GC ) 20GC 380V Water plant east board A 30GC 380V Fuel oil common plant brd A Units 1-3 (Lethabo) 380V Fuel oil common plant brd 1A Units 1-3 (Tutuka) 40GC 380V Administration block computer board 50GC 380V Water plant board 1A 51GC 380V Access control board (Lethabo) 60GC 380V Incline conveyor board 2A 61GC 380V Ash stacker board 2 (Lethabo) 00GD ) 10GD ) 20GD 380V Water plant east board B 30GD 380V Fuel oil common plant brd B Units 4-6 (Lethabo) 380V Fuel oil common plant brd B Units 4-6 (Tutuka) 40GD 380V Electrical workshop board 50GD 380V Water plant board 1B 51GD 380V Effluent concentration plant board A (Lethabo) 60GD 380V Incline conveyor board 2B 61GD 380V Tripper carriage board 2 (Lethabo) 00GE ) 10GE ) 20GE 380V Sluice water board A (Tutuka) 380V Sluice dam pump house board (Lethabo) 30GE 380V Workshop board A 40GE 380V Station crane board 2 50GE 380V Water plant board 2A 51GE 380V Effluent concentration plant board B (Lethabo) 60GE 380V Incline conveyor board 3A

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM 00GF ) 10GF ) 20GF Sluice water board B (Tutuka) 30GF 380V Workshop board B 40GF 380V Maintenance workshop board (Maintenance repair gang) 50GF 380V Water plant board 2AB 51GF 380V Sewage treatment plant board 2 (Lethabo) 60GF 380V Incline conveyor board 3B 00GG ) 10GG 380V Demineralisation distribution board (Tutuka) 20GG 380V Overland ash conveyor board A (Tutuka) 30GG 380V Platers welders workshop board (Tutuka) 40GG 400 kV Yard 380V board 1 (Tutuka) 50GG 380V Board A in 275 kV yard (Lethabo) 380V LP services board 1A (Tutuka) 60GG 380V Coal & ash silos board A (Tutuka) 380V Ash plant west board A (Lethabo) 00GH ) 10GH 380V Trace heating distribution board (Tutuka) 20GH 380V Overland ash conveyor board B (Tutuka) 30GH 380V Recarbonation system board 1(Tutuka) 40GH 380V Board 2 in 400 kV yard (Tutuka) 50GH 380V Board B in 275 kV yard (Lethabo) 380V LP services board 1B (Tutuka) 60GH 380V Coal & ash silos board B (Tutuka) 380V Ash plant west board B (Lethabo) 00GJ ) 10GJ 380V Effluent plant board A (Tutuka) 20GJ 380V Ash stacking board A (Tutuka) 30GJ 380V Central maintenance services board A (Lethabo) 40GJ 380V Canteen board 50GJ 380V Dist. board A (Lethabo) 380V Dist. Board (Tutuka) 60GJ 380V Fuel oil common plant board A Units 1-3 (Lethabo) 380V Fuel oil common plant board 2A Units 1-3 (Tutuka) 00GK ) 10GK 380V Effluent plant board B (Tutuka) 20GK 380V Ash stacking board B (Tutuka) 30GK 380V Central maintenance services board B (Lethabo) 40GK )

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM 50GK 380V Dist. board B (Lethabo) 60GK 380V Fuel oil common plant board B Units 4-6 (Lethabo) 380V Fuel oil common plant board 2B Units 4-6 (Tutuka) 00GL ) 10GL ) 20GL 380V Water pollution board 1 (Tutuka) 30GL ) 40GL ) 50GL 380V Cooling water pump house west board A 60GL 380V Coal & ash silo board 2A 00GM ) 10GM ) 20GM ) 30GM ) 40GM ) 50GM 380V Cooling water pump house west board B 60GM 380V Coal & ash silo board 2B 00GN ) 10GN ) 20GN ) 30GN ) 40GN ) 50GN 380V Lab test equipment board 60GN 380V Ash conveyor board 1A (Lethabo) 380V Ash dump station south board (Tutuka) 00GP ) 10GP ) 20GP ) 30GP ) 40GP ) 50GP 380V Station crane board 1 60GP 380V Ash conveyor board 1B (Lethabo) 380V Ash dump station north board (Tutuka) 00GQ ) 10GQ ) 20GQ ) 30GQ ) 40GQ ) 50GQ 380V Transformer oil purification plant board (Tutuka) 380V Station services board 1 (Lethabo) 60GQ 380V Ash conveyor board 2A (Lethabo)

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM 00GR ) 10GR ) 20GR ) 30GR 380V Circulating water recarbonation system board 2 (Tutuka) 40GR ) 50GR 380V Station services board B (Lethabo) 380V Access control building board 1 (Tutuka) 60GR 380V Ash conveyor board 2B(Lethabo) 00GQ ) 10GQ ) 20GQ ) 30GQ ) 40GQ ) 50GQ 380V Transformer oil purification plant board (Tutuka) 380V Station services board 1 (Lethabo) 60GQ 380V Ash conveyor board 2A (Lethabo) 00GS ) 10GS ) 20GS ) 30GS ) 40GS 380V DC uninterrupted power supply & batteries

(Lethabo) 50GS 380V Station essential board 60GS 380V Ash conveyor board 3A (Lethabo) 00GT ) 10GT ) 20GT ) 30GT ) 40GT ) 50GT 380V Turbine Lubrication oil plant board (Lethabo) 60GT 380V Ash conveyor board 3A (Lethabo) 00GU ) 10GU ) 20GU ) 30GU ) 40GU ) 50GU 380V Sewage plant board 60GU 380V Coal & ash plant east board A (Lethabo) 00GV ) 10GV ) 20GV )

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM 30GV ) 40GV ) 50GV 380V Auxiliary boiler board 60GV 380V Coal & ash plant east board B (Lethabo) 00GW ) 10GW ) 20GW ) 30GW ) 40GW ) 50GW 380V Hydrogen generating plant & lighting boards 60GW 380V Ash conveyor board 4A (Lethabo) 00GX 80V Shot blast board 10GX ) 20GX ) 30GX ) 40GX ) 50GX 380V Miscellaneous station lighting board 60GX 380V Ash conveyor board 4A (Lethabo) 00GY 80V Canteen board 10GY ) 20GY ) 30GY ) 40GY ) 50GY 380V Water plant essential board 60GY 380V Ash dam pump house board A (Lethabo) 00GZ ) 10GZ ) 20GZ ) 30GZ ) 40GZ ) 50GZ 380V Hydrogen generating plant board (Lethabo) 380V Radio & phone building board (Tutuka) 60GZ 380V Ash dam pump house board B (Lethabo) ALPHA/NUMERIC CODES FOR STATION HV & LV EQUIPMENT Alpha/Numeric Title 00HF Alarm panels in outside plant control station 01HF Unit 1 alarm panels 02HF Unit 2 alarm panels 03HF Unit 3 alarm panels 04HF Unit 4 alarm panels 05HF Unit 5 alarm panels

Reference: OPS 0158

AKZ POWER PLANT CLASSIFICATION SYSTEM 06HF Unit 6 alarm panels 10HF Alarm panels in LP pump house west 20HF Alarm panels in sub-station east bulk oil plant east 30HF Alarm panels in sub-station south 40HF Alarm panels in sub-station north 50HF Alarm panels in station board room 60HF Alarm panels in ash conveyor system 00HJ Master & slave clocks in station control and Outside plant control room 01HJ Slave clocks in Unit 1 control room 02HJ Slave clocks in Unit 2 control room 03HJ Slave clocks in Unit 3 control room 04HJ Slave clocks in Unit 4 control room 05HJ Slave clocks in Unit 5 control room 06HJ Slave clocks in Unit 6 control room 10HJ Slave clock in water treatment control room 20HJ ) 30HJ ) 40HJ Slave clocks in administration building 50HJ ) 60HJ ) 00HM Measurement panels in HV yard voltage selection and station boards 01HM Measurement panels in unit 1 02HM Measurement panels in unit 2 03HM Measurement panels in unit 3 04HM Measurement panels in unit 4 05HM Measurement panels in unit 5 06HM Measurement panels in unit 6 10HM Measurement panels for station services boards 20HM Measurement panel for sub-station east 30HM Measurement panel for sub-station south 40HM Measurement panel for sub-station north 50HM ) 60HM ) 00KV ) 10KV ) 20KV ) 30KV ) 40KV ) 50KV 380V Auxiliary boiler board 60KV ) 10WX Fly ash mechanical conveyors (area 1) 20WX Fly ash mechanical conveyors (area 2)