 in electrical design that will implement safety measures, optimum performance, and legal requirements to the engineering projects. Understand various practices, rules along with regulations that are required to be followed while doing electrical installations, wiring and selection of equipments and designing systems following IS codes.){kind=link}
This post describes a number of Indian Standards concerning electrical design.
It covers practices for
- General electrical wiring installations,
- Fire protection practices,
- Induction motors,
- Transformers,
- Switchgear & control gear,
- Accumulators & batteries,
- Motors,
- Cables and carriers, and
- Alternators.
Some of the most covered aspects within the set standards include insulation, protection from lighting, earthing, classification of hazardous areas, and the testing of the electrical equipment.
| Indian Standards | |
| Indian Standards (Electrical Design) | |
| General Requirements | |
| IS–732 | Code of Standards for Electrical Wiring Installations (System voltage not exceeding 650 volts) |
| IS–900 | Code standards for installing and maintaining induction motors |
| IS–1271 | Classification of the insulting materials for electrical equipment and machinery based on their thermal stability in service |
| IS–1646 | Code of Practice for Building Fire Safety (General): Electrical Installations |
| IS–1866 | Code standards for maintaining insulating oil. |
| IS–1882 | Code of Standards for Outdoor Public Address System Installation. |
| IS–1886 | Transformer installation and maintenance standards |
| IS–1913 | General and safety standards for electrical lighting fixtures |
| IS–2032 | Graphical symbols utilized in electrical technology. |
| IS–2165 | Guidelines for Insulation Coordination |
| IS–2274 | Code standards for electrical wire installations (system voltage more than 658 volts) |
| IS–2309 | Code of practice for lightning protection in buildings and allied structures. |
| IS–3034 | Code of practice for fire safety in industrial buildings – Electrical generating & distributing stations. |
| IS–3043 | Code of Standards for Earthing |
| IS-3072 | Part -1 Code of Standards for Installation & Maintenance of the Switchgear (System Voltage Not Exceeding 1000 V) |
| IS–3106 | Code of Practice for the Selection, Installation, and Maintenance of Fuse (voltage not exceeding 650 volts) |
| IS–3638 | Application guide for gas-powered relays. |
| IS–3646 | Interior illumination practice guidelines. |
| IS–3716 | Application guidance for insulation coordinating – Equipment in hazardous environments. |
| IS–3842 | Application guidelines for electrical relays for an alternating current system. |
| IS–4004 | Application Guidelines for the Non-Linear Resisted Type Lightning Arrestors for alternating current (AC)) Systems |
| IS–4146 | Voltage Transformer Application Guide. |
| IS–4201 | Current Transformer Application Guide. |
| IS–5571 | Guide for selecting electrical equipment in dangerous areas. |
| IS–5572 | Classification of dangerous locations in electrical infrastructure. |
| IS–5780 | Electrical apparatus & circuits are intrinsically safe. |
| IS–5908 | Method for measuring electrical installations in the buildings. |
| Switchgear | |
| General | |
| IS–375 | Marking and layout of switchgear busbars, main connections, and auxiliary winding. |
| IS–694 | Part 1 PVC-insulated wires (up to 100 volts) with copper conductors. |
| IS–1248 | Direct-acting electrical indicating instruments. |
| IS–2147 | The level of protection given by enclosures for low voltage switchgear & control gear. |
| IS–2208 | HRC cartridge fuse connects up to 650 volts. |
| IS–2705 | Parts I, II, and III: Current Transformers. |
| IS–3156 | Parts I, II, and III: Voltage Transformers. |
| IS–3202 | Code of Standards for Climate Proofing Electrical Equipment. |
| IS–3231 | Electrical relays for power system protection. |
| IS–4047 | Heavy-duty air break switches & composite air-break switch and fuse sets for voltages up to 1000 volts. |
| IS–4237 | General criteria for switchgear & control gear with voltages not exceeding 1000V. |
| IS–5987 | Code of Standards for Switch Selection (Voltage not to exceed 1000V). |
| 6.6 KV | |
| IS–335 | Insulating oil for the transformers & switchgears. |
| IS–2516 | Part 1 – Section 2. Alternating current circuit breakers: Requirements & tests for voltage ranges of 1000 to 11000 volts. |
| IS–3427 | Metal-enclosed switchgear & control gear for voltages greater than 1000 V but less than 11000 V. |
| 415 V | |
| IS–722 | Electricity meters run on alternating current. |
| IS–1951 | PVC sleeving for the electrical applications. |
| IS–2516 | Part 1 – Section 1 |
| Part II/Sec.2: AC circuit breakers – requirements & tests for voltages less than 1000 volts. | |
| IS–2419 | Dimensions of electrical indicator instruments. |
| BS–4752 | Circuit breakers with rated voltages up to & including 1000 and 1200 V DC. |
| BS–6231 | PVC-insulated cables for the switchgear wiring. |
| IEC–157 | Low voltage (LV) distribution switchgear circuit breakers. |
| M.C.C | |
| IS–1554 | Part I PVC-insulated (high duty) electric wires for working voltages up to 1100 volts. |
| IS–1822 | AC motor starters with voltages not exceeding 1000 V. |
| IS–2959 | AC contactors with voltages not exceeding 1000 V. |
| IS–3961 | Part II Standard current ratings for PVC-insulated and encased cables. |
| IS–5124 | Code of practice for the installation & maintenance of AC induction motor starters (voltage not to exceed 1000V). |
| IS–2959 | AC contactors with voltages not exceeding 1000 V. |
| Invertors | |
| IS–391 | Primary transformers for electronic devices. |
| Transformers | |
| IS–335 | Insulating oil for the transformers & switchgears. |
| IS–2026 | Power transformers |
| IS–2099 | High-voltage porcelain bushings. |
| IS–3070 | Lightning arrestors for Alternating Current systems. |
| IS–3637 | Gas operated relays. |
| IS–3639 | Power Transformer Fittings and Accessories |
| Motors | |
| IS–325 | 3-phase induction motors. |
| IS–4691 | The level of protection provided by the enclosures for the rotating electrical equipment. |
| IS–4722 | Rotating electric machines |
| Batteries | |
| IS–1652 | Lead-acid stationary cells and batteries (with positively charged plant plates). |
| BS–440 | Stationery batteries |
| Cables | |
| IS–1554 | Part I and II PVC-insulated (high duty) electric cables for the working voltages up to & including 1100 volts & up to 33KV. |
| IS–1753 | Aluminium conductors used in insulated cables. |
| IS–3961 | Part II – Recommended cable current ratings. |
| IS–3975 | Mild steel wires, strips, & tapes used to armour cables. |
| IS–5819 | Recommended high voltage cable short-circuit ratings. |
| IS–5831 | PVC insulation & sheaths for power cables. |
| Alternators | |
| IS–7132 | 1973 Guide for the testing synchronous machines. |
| IS–5422 | 1996 Turbine-type generators |
| IS–7306 | 1974 Methods for the determining synchronous machinery quantities through tests. |