| A | Ampere |
| AAAC | All Aluminum Alloy Conductor |
| AAC | All Aluminum Conductor |
| AB Switch | Air Break Switch |
| ABC | Aerial Bundled Conductors or Aerial Bundled Cables |
| AC | Alternating Current |
| ACB | Air Circuit Breaker |
| ACDB | Alternating Current Distribution Board |
| ACSR | Aluminum Conductors Steel Reinforced |
| ACVS | Air Conditioning And Ventilation System |
| AFC | Automated Frequency Control |
| AFC | Available Fault Current |
| AFCI | Arc Fault Circuit Interrupter |
| AH | Ampere Hour |
| AHU | Air Handling Unit |
| AIC | Ampere Interrupting Capacity |
| AL | Aluminum |
| ALCI | Appliance Leakage Current Interrupter |
| ATS | Automatic Transfer Switch |
| AWG | American Wire Gauge |
| BCR | Backspace card reader and Barcode reader |
| BER | Bit Error Rate |
| BSS | Belt Sway Switch |
| C | Capacitance |
| CFC | Continuous Function Chart |
| CKT | Circuit |
| CPSS | Construction Power Substation |
| CPT | Control Power Transformer |
| CT | Current Transformer |
| DAC | Digital to Analog Converter |
| Db | Decibel |
| DB | Distribution Board |
| DC | Direct Current |
| DCDB | Direct Current Distribution Board |
| DCDB | Direct Current Distribution Board |
| DCS | Distributed Control System |
| DO Fuse | Drop Out Fuse |
| DOL | Direct On Line |
| DOR | Digital Optical Recording |
| DP | Distributed Peripheral |
| DP | Double Pole |
| DPIC | Double Pole Iron Clad |
| DSS | Distribution Power Substation |
| EEPROM | Electrically Erasable Programmable Read Only Memory |
| EF | Exhaust Fan |
| ELCB | Earth Leakage Circuit Breaker |
| EMLDB | Emergency Lighting Distribution Board |
| EMPR | Electronic Motor Protection Relay |
| EPROM | Erasable Programmable Read Only Memory |
| F | Farad |
| F | Fuse |
| FBT | Flyback Transformer |
| FCMA | Flux Compensated Magnetic Amplifier |
| FDA | Fire Detection And Alarm |
| FLA | Full Load Amperes |
| FMC | Flexible Metal Conduit |
| GDT | Gas Discharge Tube |
| GFCI | Ground Fault Circuit Interrupter |
| GFI | Ground Fault Interrupter |
| GI Busbar | Galvanized Iron Bus Bar For Earthing |
| GIS | Gas Insulated Switchgear |
| GN | Ground |
| HART | Highway Addressable Remote Transducer |
| HMI | Human Machine Interface |
| HRC | Fuse High Rupture Capacity Fuse |
| HT | High Tension |
| HZ | Hertz |
| ICDB | Iron Clad Distribution Board |
| ICSP | In Circuit Serial Programming |
| IG | Isolated Ground |
| IMC | Intermediate Metal Conduit |
| ISMC | Indian Standard Medium Weight Channel |
| JB | Junction Box |
| kA | kiloamps or kilo Amperes |
| KV | Kilo Volts |
| KVA | Kilo Volt Amperes |
| Kvar | Kilo Volt Amperes Reactive |
| KW | KiloWatt |
| KWH | KiloWatt Hour |
| LA | Lightning Arrester |
| LCB | Local Control Board |
| LCS | Local Control Station |
| LDR | Light Dependent Resistor |
| LED | Light Emitting Diode |
| LOPT | Line Output Transformer |
| LPS | Lightning Protection System |
| LT | Low Tension |
| LVDT | Linear Variable Differential Transformer |
| MCB | Miniature Circuit Breaker |
| MCC | Motor Control Centre |
| MCC | Motor Control Center Panel |
| MCCB | Molded Case Circuit Breaker |
| MCP | Motor Control Panel |
| MCP | Motor Circuit Protection |
| MF | Multiplying Factor |
| MISO | Master Input Slave Output |
| MLDB | Main Lighting Distribution Board |
| MMI | Man-Machine Interface |
| MOSI | Master Output Slave Input |
| MOV | Metal oxide varistor |
| MPCB | Motor Protection Circuit Breaker |
| MPDB | Main Power Distribution Board |
| MPI | Multi-Point Interface |
| MS | Main Switch |
| MVA | Mega Volt Amperes |
| Mvar | Mega Volt Amperes Reactive |
| MW | Megawatt |
| NC | Normally Closed |
| NCT | Neutral Current Transformer |
| NL | Neutral Link |
| NO | Normally Opened |
| NO | Normally Open |
| OLTC | On Load Tap Changer |
| P | Pole |
| PB | Push Button |
| PCC | Power Control Centre |
| PCC | Power Control Centre Panel |
| PCS | Pull Cord Switch |
| PDB | Power Distribution Board |
| PDP | Power Distribution Panel |
| PID Control | Proportional Integral And Derivative Control |
| PLC | Programmable Logic Controller |
| PROM | Programmable Read Only Memory |
| PT | Potential Transformer |
| PVC | Poly Vinyl Chloride |
| Q | Charge |
| R | Resistance |
| RAM | Random Access Memory |
| RCBO | Residual Current Circuit Breaker With Over-Current Protection |
| RCBO | Residual Current Circuit Breaker with Overload Protection |
| RCC | Remote Control Cables |
| RCCB | Residual Current Circuit Breaker |
| RCD | Residual Current Device |
| RDOL | Reverse Duty On Line |
| RFID | Radio Frequency Identification |
| RIO | Remote Input Output |
| RMC | Rigid Metal Conduit |
| RMG | Ring Main Gear |
| RMU | Ring Main Unit |
| RNC | Rigid Non Metallic Conduit |
| ROM | Read Only Memory |
| RTD | Resistance Temperature Detector |
| SB | Switch Board |
| SCADA | Supervisory Control And Data Acquisition |
| SCIM | Squirrel Cage Induction Motor |
| SCK | Serial Clock |
| SCR | Silicon Controlled Rectifier |
| SF6 Circuit Breaker | Sulphur Hexafluoride Circuit Breaker |
| SFC | Sequential Function Chart |
| SFU | Switch Fuse Unit |
| SLDB | Secondary Lighting Distribution Board |
| SMF Battery | Sealed Maintenance Free Battery |
| SMSB | Sub Main Switchboard |
| SP | Single Pole |
| SPDT | Single Pole Double Throw |
| SPI | Serial Peripheral Interface |
| SPNDB | Short Circuit Protection Neutral Distribution Board |
| SPST | Single Pole Single Throw |
| SPT | Stranded Parallel Thermoplastic |
| ST | Shunt Trip |
| STR | Statimax Trip Release |
| SW | Switch |
| SWG | Standard Wire Gauge |
| TB | Terminal Box |
| TEFC | Total Enclosed Fan Cooled |
| TESC | Totally Enclosed Surface Cooled |
| TMCB | Thermal Magnetic Circuit Breaker |
| TPDT | Triple Pole Double Throw |
| TPIC | Triple Pole Iron Clad |
| TPNDB | Three Phase And Neutral Distribution Board |
| TPS | Triple Pole Switch |
| TPST | Triple Pole Single Throw |
| TRS | Tough Rubber Sheathed |
| TTL | Transistor-Transistor Logic |
| TVS-Diode | Transient Voltage Suppression Diode |
| UART | Universal Asynchronous Receiver and Transmitter |
| UDS | Uniform Drawing System |
| UG | Under Ground |
| UPS | Un-Interrupted Power Supply |
| UPS | Uninterruptible Power Supply |
| USART | Universal Synchronous and Asynchronous Receiver and Transmitter |
| USB | Universal Serial Bus |
| V | Volts |
| VA | Volt Ampere |
| Var | Volt Ampere Reactive |
| VCB | Vacuum Circuit Breaker |
| VCC | Voltage at the common collector |
| VCM | Vehicle Communication Module |
| VDU | Visual Display Unit |
| VFDP | Variable Frequency Drive Panel |
| VIR | Vulcanized Indian Rubber |
| VSD | Variable Speed Drive |
| VT | Voltage Transformer |
| VVVF | Variable Voltage Variable Frequency Drive |
| W | Watt |
| XLPE | Cross-linked Polyethylene |
| ZSS | Zero Speed Switch |
