| A | Amperes | |
| AC | Accuracy Class | |
| Ac | Alternating Current | |
| ACL | Access Control List | |
| ACMA | Australian Communication and Media Authority | |
| AD | Anaerobic Digester | |
| A/D | Analogue to Digital | |
| ADA | Americans with Disabilities | |
| ADC | Analogue to Digital Converter | |
| ADRs | Accessible Design Resources | |
| ADSL | Asynchronous Digital Subscriber Line | |
| AEE | Association of Energy Engineers (US-based) | |
| AFC | Approved For Construction | |
| Afcone | African Commission on Nuclear Energy | |
| AFD | Approved for Design | |
| AFE | Active Front End | |
| AFF | Above Finished Floor | |
| AFG | Above Finished Grade | |
| AGV | Automatic Guided Vehicle | |
| AHF | Advanced Harmonic Filters | |
| AHU | Air Handling Unit | |
| AIC | Amps Interrupting Capacity | |
| AIN | Analogue Input | |
| ALCMS | Airfield Lighting Control & Monitoring System | |
| AMS | Approved Measuring System | |
| ANN | Annunciator | |
| ANSI | American National Standards Institute | |
| AOP | Advanced Oxidisation Process | |
| AP | Assembly and Programming | |
| APC | Advanced Process Control | |
| APC | Associated Production Centre | |
| APD | Asset Protection Devices | |
| API | Active Pharmaceutical Ingredients | |
| API | American Petroleum Institute | |
| APM | Alternating Pulse Modulation | |
| APS | Advanced Planning and Scheduling | |
| ARC | Advanced Regulated Control | |
| ASEISA | Accelerated and Shared Growth in South Africa | |
| ASIC | Application Specific Integrated Circuit | |
| ASR | Advanced Sulphur Reduction | |
| ASS | Adaptive Scheduling Systems | |
| ASTM | American Society for Testing and Materials | |
| ATE | Automated Testing Equipment | |
| ATS | Automatic Transfer Switch | |
| AU | African Union | |
| AWE | Airborne Wind Energy | |
| AWG | American Wire Gauge | |
| BAS | Building Automation System | |
| BAT | Battery | |
| BBPL | Broad Band Power Line | |
| BEMS | Building Energy Management System | |
| BER | Bit Error | |
| BFG | Below Finish Grade | |
| BFSG | Bonded Foil Strain Gauges | |
| BIOS | Basic Input/ Output System | |
| BIPV | Building Integrated Photovoltaics | |
| BJT | Bipolar Junction Transistor | |
| BLdc | Brushless Direct Current | |
| BMF | Building Management Facilities | |
| BMS | Building Management System | |
| BNR | Biological Nutrient Removal | |
| BOD | Biological Oxygen Demand | |
| BPFO | Ball Park Frequency of Outer Race | |
| BSE | Building Services and Equipment | |
| BSI | British Standards Institute | |
| BTU | British Thermal Unit | |
| C | Conduit | |
| C&I | Control and Instrumentation | |
| CAA | Clean Air Act | |
| CAD/CAM | Computer Aided Design/ Computer Aided Manufacture | |
| CAN | Controller Area Network | |
| CAPEX | Capital Expenditure | |
| CAT | Computerised Axial Tomography | |
| CATS | Convergent Automation Technology Solution | |
| CATV | Cable Television | |
| CB | Circuit Breaker | |
| CBA | Component Based Automation | |
| CBEMA | Computer and Business Equipment Manufacturers Association | |
| CBF | Control Builder F | |
| CCD | Charge Coupled Device | |
| CCS | Carbon Capture and Storage | |
| CCTV | Closed Cicruit Television | |
| CD | Chromatic Dispersion | |
| CDM | Clean Development Mechanism | |
| CDP | Carbon Disclosure Project | |
| CEM | Certified Energy Manager | |
| CEMEP | Committee of Manufacturers of Electrical Machines and Power Electronics | |
| CFB | Circulating Fluidised Bed | |
| CFC | Continuous Function Chart | |
| CFL | Compact Fluorescent Lamp | |
| CHP | Combined Heat and Power | |
| CIF | Common Intermediate Format | |
| CIGS | Copper Indium Gallium Selenide | |
| CIN | Contact Input | |
| CIP | Cleaning in Process/Place | |
| CIP | Common Industrial Protocol | |
| CIV | Corona Inception Voltage | |
| CMMS | Computerised Maintenance Management System | |
| CMVP | Certified Measurement and Verification Professional | |
| CMVPSA | Council of Measurement and Verification Professionals of South Africa | |
| CO | Conduit Only | |
| CO2 | Carbon Monoxide | |
| COD | Chemical Oxygen Demand | |
| COM | Common Object Model | |
| COMPS | Centre of Material and Process Synthesis | |
| COP | Cleaning out of Place (process) | |
| COP | Congress of the Parties | |
| COS | Carbonyl Sulphide | |
| CoS | Class of Service | |
| CP/M | Control Programme for Micro Computers | |
| CPT | Control Power Transformer | |
| CPU | Central Processing Unit | |
| CRC | Cyclic Redundancy Check | |
| CRI | Colour Rendering Index | |
| CS2 | Carbon Disulphide | |
| CSIR | Council for Scientific and Industrial Research | |
| CSMA/CD | Carrier Sense Multiple Access with Collision Detection | |
| CSP | Concentrated Solar Power | |
| CTB | Central Terminal Building | |
| CTC | Continuously Transposed Conductor | |
| CTIA | Cape Town International Airport | |
| CTL | Coal to Liquid | |
| CTM | Cable Theft Monitor | |
| CTS | Cape Town Stadium | |
| CU | Copper | |
| CVD | Chemical Vapour Disposition | |
| CWDM | Coarse Wavelength Division Multiplexing | |
| (D) | Demolition | |
| D&R | Documentation and Rationalisation | |
| D/A | Digital to Analogue | |
| DALI | Digitally Addressable Lightning Interface | |
| DAQ | Data Acquisition | |
| dB | Decibels | |
| Dc | Direct Current | |
| DCCT | Dc Current Transducer | |
| DCOM | Distributed Component Object Model | |
| DCP | Data Control Program | |
| DCS | Distributed Control System | |
| DFSK | Digital Frequency Shift Keying | |
| DGA | Dissolved Gas Analysis | |
| DHCP | Dynamic Host Configuration Protocol | |
| DIC | Direct and Indirect Costs | |
| DIL | Design Insulation Level | |
| DLL | Dynamic Link Library | |
| DMM | Digital Multi Meter | |
| DMZ | Demilitarised Zone | |
| DBD | Dielectric Barrier Discharge | |
| DNI | Direct Normal Irradiation | |
| DO | Dissolved Oxygen | |
| DoE | Department of Energy | |
| DOL | Direct On Line | |
| DOS | Disk Operating System | |
| DP | Degree of Polymerisation | |
| DP | Differential Pressure | |
| DP | Distributed Peripherals | |
| DPC | Downtime Production Costs | |
| DPF | Displacement Power Factor | |
| DP-QPSK | Dual Polarised Quadrature Phase Shift Keying | |
| DPR | Digital Path Receiver | |
| DRI | Direct Refuse Iron | |
| DSF | Dispersion Shifted Fibre | |
| DSM | Demand Side Management | |
| DSP | Digital Signal Processor | |
| DSCP | Differentiated Services Code Point | |
| DSSC | Dye Sensitised Solar Cell | |
| DSSS | Direct Signal Spread Spectrum | |
| DTC | Direct Torque Control | |
| DTI | Department of Trade and Industry | |
| DWDM | Dense Wavelength Division Multiplexing | |
| EDF | Electricité de France | |
| EDFA | Erbium Doped Fibre Amplifiers | |
| EEC | Electrical Energy Costs | |
| EEC | Energy and Environmental Consulting | |
| EEDSM | Energy Efficiency Demand Side Management | |
| EEG | Erneuerbare Energien Gesetz (Law on) | |
| EF | Exhaust Fan | |
| Eff | Efficiency | |
| EG | Equipment Grounding | |
| EGU | Engine Generator Unit | |
| EHV | Extra High Voltage | |
| EIRP | Effective Isotropic Radiated Power | |
| ELCB | Earth Leakage Circuit Breaker | |
| eLPS | External Lightning Protection Solution | |
| EM | Emergency | |
| EMC | Electro Magnetic Compatibility | |
| EMF | Electromagnetic Field | |
| EMS | Energy Management System | |
| EMT | Electrical Metal Conduit | |
| ENT | Electrical Non-Metallic Conduit | |
| EMS | Energy Metering System | |
| EP | Explosion Proof | |
| EP | Equipotential Platform | |
| EPAct | Energy Policy and Conservation Act | |
| EPCM | Engineering, Procurement and Construction Management | |
| EPIS | Energy Performance Indicator System | |
| EPR | Ethylene Propylene Rubber | |
| EPRI | Electric Power Research Institute | |
| EQB | Environmental Quality of Buildings | |
| ERP | Effective Radiated Power | |
| ERP | Enterprise Resource Planning | |
| ESCO | Energy Services Company | |
| ESD | Electrostatic Discharge | |
| ESD | Emergency Shutdown | |
| ESG | Environment, Social and Corporate Governance | |
| ESR | Equivalent Series Resistance | |
| ETF | Energy Training Foundation | |
| ETF | Exchange Traded Fund | |
| EU | European Union | |
| (F) | Future | |
| FA | Fire Alarm | |
| FACp | Fire Alarm Control Panel | |
| FAT | Factory Acceptance Test | |
| F+B | Food and Beverage | |
| FC | Fan Coil | |
| FCC | Federal Communication Commission | |
| FDA | Food and Drug Administration | |
| FEA | Finite Element Analysis | |
| FER | Frame Error Rate | |
| FHSS | Frequency Hopping Spread Spectrum | |
| FIDS | Flight Information Display System | |
| FIFO | First In - First Out | |
| FLC | Full Load Current | |
| FPGA | Field Programmable Gate Array | |
| fps | frames per second | |
| FSK | Frequency Shift Key | |
| FTP | File Transfer Protocol | |
| FU | Fuse | |
| FWLI | Full Wave Lightning Impulse | |
| GaAs | Gallium Arsenide | |
| GARP | Generic Attribute Registration Protocol | |
| GBCSA | Green Building Council of South Africa | |
| GC | Gas Chromatograph | |
| GND | Ground | |
| GDP | Growth Domestic Product | |
| GFCI | Ground Fault Circuit Interrupter | |
| GFR | Ground Fault Relay | |
| GHG | Greenhouse Gas | |
| GIC | Geo-magnetic Induced Currents | |
| GIS | Gas-insulated Swtichgear | |
| GMRP | GARP Multicast Registration Protocol | |
| GOOSE | Generic Object Oriented Substation Event | |
| GPS | Global Positioning Satellite | |
| GPS | Global Positioning System | |
| GPR | Ground Potential Rises | |
| GSM | Global System for Mobile Communications | |
| GTL | Gas to Liquid | |
| HAZOP | Hazard and Operability Study | |
| HCV | High Containment Valves | |
| HF | Hydrofluoric Acid | |
| HH | Handhole | |
| HID | High Intensity Discharge | |
| HMI | Human Machine Interface | |
| HOA | Hand-Off-Auto Switch | |
| HP | Horse Power | |
| HPLC | High Performance Liquid Chromatography | |
| HPS | High Pressure Sodium | |
| HQE | High Quality Environment | |
| HSE | Health, Safety and Environment | |
| HSR | High-availability Seamless Redundancy | |
| HTF | Heat Transfer Formula | |
| HV | High Voltage | |
| HVAC | Heating, Ventilation, Air-conditioning | |
| Hz | Hertz | |
| I/O | Input/ Output | |
| IACS | Industrial Automation and Control Systems | |
| ICASA | Independent Communications Authority for South Africa | |
| ICC | Integrated Control Configurator | |
| ICS | Industrial Control Systems | |
| IDM | Integrated Demand Management | |
| Ids | Identifications | |
| IEA | International Energy Agency | |
| IEC | International Electrotechnical Commission | |
| IEEE | Institute of Electrical and Electronics Engineering | |
| IEGT | Injection Enhanced Gate Transistor | |
| IFT | Inter-facial Tension | |
| IG | Isolated Ground | |
| IGBT | Insulated Gate Bipolar Transistor | |
| IGCT | Integrated Gate Commuted Thyristor | |
| ILEP | Integrated Lightning Engineering Plan | |
| ILEPS | Internal Lightning Protection System | |
| iLPS | Integrated Lightning Protection Solution | |
| IP | Internet Protocol | |
| IPAP | Industrial Policy Action Plan | |
| IPC | Industrial Personal Computer | |
| IPMVP | International Performance Measurement and Verification Protocol | |
| IPP | Independent Power Producer | |
| IPsec | Internet Protocol Security Architecture | |
| ISA | Industry Standard Architecture | |
| ISDN | Integrated Services Digital Network | |
| ISM | Industrial, Scientific, Medical | |
| ISO | International Standards Organisation | |
| ISP | Intelligent Signal Processing | |
| IT | Information Technology | |
| ITTATC | Information Technology Technical Assistance and Training Centre | |
| JB | Junction Box | |
| KAIC | Kilo-Amps Interrupting Capacity | |
| KPA | Key Performance Area | |
| KSIA | King Shaka International Airport | |
| KV | Kilovolt | |
| KVA | Kilovolt-Amp | |
| kVAR | Reactive Power | |
| KW | Kilowatt | |
| KWH | Kilowatt-Hour | |
| LAN | Local Area Network | |
| LCD | Liquid Crystal Display | |
| LDN | Lightning Detection Network | |
| LED | Light Emitting Diode | |
| LEH | Light Emitting Heater | |
| LOR | Light Output Ratio | |
| LPS | Lightning Protection System | |
| LPZ | Lightning Protection Zone | |
| LRS | Liquid Resistance Starters | |
| LSI | Large Scale Integration | |
| L V | Low Voltage | |
| M&V | Measurement and Verification | |
| MAC | Media Access Control | |
| MAC | Main Automation Contractor | |
| mCB | Main Circuit Breaker | |
| Mcb | Mini circuit breaker | |
| MCC | Motor Control Centre | |
| MCOV | Maximum Continuous Operation Voltage | |
| MCP | Motor Circuit Protector | |
| MEBB | Main Equipotential Bonding Bar | |
| MFR | Manufacturer | |
| MH | Metal Halide | |
| MICE | Mechanical, Ingress, Climatic/Chemical, Electromagnetic | |
| MLO | Main Lugs Only | |
| MOV | Metal Oxide Varistor | |
| MP | Measuring Point | |
| MRI | Magnetic Resonance Imaging | |
| MSDS | Material Safety Data Sheet | |
| MSI | Master Systems Ingegrator | |
| MTBF | Mean Time Before Failure | |
| MTDR | Metallic Time Domain Reflector | |
| MTR | Maximum Time to Respond | |
| MV | Medium Voltage | |
| MVA | Mega-volt Amperes | |
| MVR | Mechanical Vapour Compression | |
| MW | Microwave | |
| (N) | New | |
| NASA | National Aeronautics and Space Administration | |
| NAT | Network Address Translation (also IP Masquerading) | |
| NDA | Non Disclosure Agreement | |
| NDSF | Non Dispersion Shifted Fibre | |
| NEC | Neutral Earthing Resistor | |
| Necsa | South African Nuclear Energy Corporation | |
| NED | National Electric Code | |
| NEEA | National Energy Efficiency Agency | |
| NEMA | National Electrical Manufacturers Association | |
| NESC | National Electric Safety Code | |
| NFPA | National Fire Protection Association | |
| NGO | Non-governmental Organisation | |
| NIC | Not In Contract | |
| NL | Night Light | |
| NMBS | Nelson Mandela Bay Stadium | |
| NOAA | National Oceanic and Atmospheric Administration | |
| NPC | Neutral Point Clamped | |
| NPT | Nuclear Non-Proliferation Treaty | |
| NPV | Net Present Value | |
| NRS | National Rationalise Specification | |
| NTP | Network Time Protocol | |
| NTS | Not to Scale | |
| NZ-DSF | Non Zero Dispersion Shifted Fibre | |
| O&M | Operations and Management | |
| OC | On Centre | |
| OCGT | Open Cycle Gas Turbine | |
| ODAF | Oil Directed Air Forced | |
| OEL | Occupational Exposure Level | |
| OEM | Original Equipment Manufacturer | |
| OFAF | Oil Forced Air Forced | |
| OHS | Occupational Health and Safety | |
| OHSA | Occupational Health and Safety Act | |
| OIP | Oil Impregnated Paper | |
| OLE | Object Linking and Embedding | |
| ONAF | Oil Natural Air Forced | |
| ONAN | Oil Natural Air Natural | |
| OPC | OLE for Process Control | |
| OPEX | Operational Expenditure | |
| OPV | Organic Photovoltaics | |
| OSHA | Occupation Health and Safety Act | |
| OTSC | Once Through Super Critical | |
| P&AC | Process and Automation Control | |
| P&G | Provisional and General | |
| PA | Public Address | |
| PB | Pull Box | |
| PBMR | Pebble Bed Modular Reactor | |
| PCB | Printed Circuit Board | |
| PCB | Poly Chlorinated Biphenyl | |
| PCDD | Poly Chlorinated Dibenzo Dioxins | |
| PCDF | Poly Chlorinated Dibenzo Furanes | |
| PCI | Personal Computer Instrumentation | |
| PCI | Protocol Control Information | |
| PCM | Phase Change Material | |
| PCN | Process Control Network | |
| PCP | Power Conservation Programme | |
| PD | Partial Discharge | |
| PDCA | Plan-Do-Check-Act | |
| PF | Power Factor | |
| PF | Pulverised Coal | |
| PFC | Power Factor Correction | |
| PFL | Power Fault Locator | |
| PHA | Process Hazard Analysis | |
| PID | Proportional Integral Derivative | |
| PILC | Paper Insulated Lead Covered Cable | |
| PKI | Public Key Infrastructure | |
| PLC | Programmable Logic Controller | |
| PMD | Polarisation Mode Dispersion | |
| PMI | Positive Material Identification | |
| PN | Positive Negative | |
| POF | Plastic Optical Fibre | |
| PoS | Point of Sale | |
| PP | Pulsed Power | |
| Ppb | Parts per billion | |
| PPE | Personal Protection Equipment | |
| Ppm | Parts per minute | |
| PQ | Power Quality | |
| PRP | Parallel Redundancy Protocol | |
| PT | Potential Transformer | |
| PTP | Precision Time Protocol | |
| PTPv2 | Precision Time Protocol version 2 | |
| PTT | Press-to-Test | |
| PTZ | Pan Tilt Zoom | |
| PV | Photo Voltaic | |
| PV | Process Variable | |
| PVC | Polyvinyl Chloride | |
| PW | Pulse Width Modulation | |
| QMS | Quality Management System | |
| QoS | Quality of Service | |
| RAS | Remote Access Server | |
| RE | Renewable Energy | |
| RECPT | Receptacle Outlet | |
| REIPPPP | Renewable Energy Independent Power Producer Procurement Programme | |
| REFIT | Renewable Energy Feed In Tariff | |
| RF | Radio Frequency | |
| RGS | Rigid Galvanised Steel | |
| RIP | Resin Impregnated Paper | |
| RISC | Reduced Instruction Set Controller | |
| RMU | Ring-Main Unit | |
| rpm | revolutions per minute | |
| ROI | Rate/return of Investment | |
| ROSE (Foundation) | Recycling Oil Saves the Environment | |
| RSS | Relay Server Software | |
| RSTP | Rapid Spanning Tree Protocol | |
| RTD | Resistance Temperature Detector | |
| RTO | Real Time Optimisation | |
| RTU | Remote Terminal Unit | |
| RVSS | Reduced Voltage Soft Start | |
| SABS | South African Bureau of Standards | |
| SAEE | Southern African Association for Energy Efficiency | |
| SAIDI | Systems Average Interruption Duration Index | |
| SALDN | SA Lightning Detection Network | |
| SAN | Storage Area Network | |
| SANAE | South African National Antarctic Expedition | |
| SANEA | South African National Energy Association | |
| SANAS | South African National Accreditation System | |
| SANEDI | South African National Energy Development Institute | |
| SANS | South African National Standard | |
| SANSA | South African National Space Agency | |
| SARS | South African Revenue Service | |
| SAT | Site Acceptance Test | |
| SBAT | Sustainable Building Assessment Tool | |
| SCADA | Supervisory Control and Data Acquisition | |
| SCR | Silicon Controlled Rectifier | |
| SCSI | Small Computer System Interface | |
| SGCT | Symmetrical Gate Commutated Thyristor | |
| SiC | Silicon Carbide | |
| SIL | Safety Integrity Level | |
| SIS | Safety Instrumented System | |
| SM | Single Mode | |
| SMT | Surface Mount Technology | |
| SNMP | Simple Network Management Protocol | |
| SOC | System On Chip | |
| SPD | Surge Protection Device | |
| SQL | Structured Query Language (database) | |
| SSC | Screened Separable Connector | |
| SSC | Submerged Scrapper Conveyors | |
| SWH | Solar Water Heating | |
| T&O | Taste and Odour | |
| TC | Technical Committee | |
| TCP | Transmission Control Protocol | |
| TCO | Total Cost of Ownership | |
| TDR | Time Domain Reflector | |
| THO | Total Harmonic Distortion | |
| TLC | Thin Layer Chromatology | |
| TOC | Total Owing Cost | |
| TOU | Time of Use | |
| TS | Thermally Stabilised | |
| TSSP | Transient Switching Surge Protection | |
| TU | Thermally Upgraded | |
| TVSS | Transient Voltage Surge Suppressor | |
| UF | Under Floor | |
| UG | Underground | |
| UHF | Ultra High Frequency | |
| UHT | Ultra High Temperature | |
| UNEP | United Nations Environment Programme | |
| UNFCCC | United Nations Framework Convention on Climate Change | |
| UNPRI | United National Principles of Responsible Investment | |
| UON | unless Otherwise Noted | |
| UPS | Uninterruptible Power Supply | |
| USB | Universal Serial Bus | |
| USC | Unscreened Separable Connector | |
| UV | Ultra Violet | |
| V | Volt | |
| VA | Volt-Amp | |
| V/F | Voltage to Frequency | |
| VFD | Variable Frequency Drive | |
| VFT | Very Fast Terminal | |
| VFTO | Very Fast Transient Overvoltage | |
| VHF | Very High Frequency | |
| VLAN | Virtual Local Area Network | |
| VOC | Volatile Organic Compound | |
| VoIP | Voice-over Internet Protocol | |
| VPN | Virtual Private Network | |
| VPI | Vacuum Pressure Impregnation | |
| VPS | Virtual Power Station | |
| VSD | Variable Speed Drive | |
| WAGES | Water, Air, Gas, Electricity and Steam | |
| WAN | Wide Area Network | |
| WCM | World Class Manufacturing | |
| WDM | Wavelength Division Multiplexing | |
| WFQ | Weighted Fair Queuing | |
| WiFi | Wireless Fidelity | |
| WiMAX | Worldwide Inter-Operability Microwave Access | |
| WP | Weatherproof | |
| WSN | Wireless Sensor-based Networks | |
| WWF | World Wide Fund for Nature | |
| XLPE | Cross Linked Polyethylene | |
| XFMR | Transformer | |
