The Indian Electricity Rules, 1956

RULES:-

 

Rules 1/28 Voltage': The distinction of electrical potential urged in volts between any 2 conductors or between part of either conductor and also the earth as measured by appropriate meter and same to be:

Low: wherever the voltage doesn't exceed 240 volts underneath oral conditions, subject, however, to the share variation allowed by these rules.

Medium: wherever the voltage doesn't exceed 650 volts under traditional conditions, subject, however, to the share variation allowed by these rules.

High: once the voltage doesn't exceed twenty two,000 volts underneath traditional conditions, subject, however, to the share variation allowed by these rules.

Extra High: once the voltage doesn't exceed twenty two kilo volt.

Rule No. 31: States that the provider ought to offer AN iron clad cutout for all unearthed conductors.

Rule No. 32: States that the provider ought to offer at the commencement purpose of offer a conductor which might be known as neutral to alter reference to consumer's earth system, no separate switch, link or fuse ought to be utilized in neutral except once it forms a part of a multi-pole switch capable of removing entire offer.

Rule No. 33:States that the patron mistreatment medium, high, additional high voltage ought to offer his own fastening system with freelance conductor and maintain it rigorously.

Rule No. thirty four : States that clean conductor utilized in a building ought to be inaccessible: i.e., it mustn't be close while not the employment of ladder or the other instrumentality and special effort.

Rule No. thirty five : 'Caution notices in Hindi and native language ought to be classified to motors, generators, transformers etc. If many apparatuses area unit in one enclosure, one notice can do.

Rule No. 36: Before work on an electrical conductor or equipment is undertaken, it ought to be discharged by fastening or by different appropriate means that. Precautions ought to be taken to stop identical from being charged accidentally or by mistake.

Rule No. thirty eight : versatile cables used for motors, generators, transformers, rectifiers, electrical drills, spray and delving set and different transportable and portable equipment ought to be heavily insulated and adequately protected against mechanical injury and if there's bronze armoring, it ought to be connected to the frame and conjointly earthed.

Rule No. 42: each circuit and equipment ought to be thus organized that there's no danger of their obtaining charged with a voltage more than that they're meant.

Rule No. 43: This rule insists on keeping fireplace buckets crammed with dry sand and chemical compound or liquid-carbon-dioxide fireplace extinguishers in generating stations and substations. They embody keeping of first-aid boxes and coaching of operation'first aid'.

Rule No. 44: This refers to the affixing of directions in English, Hindi and native language stating treatment for restoration of persons affected by electrical shocks.

Rule No. forty five : Prohibits unauthorized  contractor or someone not holding a ability certificate from doing adjustment, alteration, repair installation work, except replacement of lamps, fans, switches and low voltage domestic appliances. It conjointly states that electrical offer needn't tend to such installations by any provider

Rule No. 46: Refers to periodic examination of installation at AN interval or not olympian five years by the provider or inspector. General Conditions with reference to offer and Use of voltage.

Rule No. 47: need testing of and installation by the provider before the commencement of offer. It conjointly empowers provider to refuse affiliation if the installation is dangerous and provider might counsel modification to render the installation safe.

Rule No. forty eight : Empowers the provider to refuse to attach installation having a escape current exceeds 145000th a part of the utmost current as escape.

Rule No. 49: Empowers the provider to disconnect once forty eight hours notice in writing if the escape exceeds 1/5000th a part of the utmost current This rule is incredibly vital from the purpose of read of AN lineman because it considerations the conditions for offer of energy.

Rule No. 50: 

(a) the patron should offer an appropriate link switch or circuit-breaker of adequate capability at the purpose of commencement of offer, capable of being simply operated to utterly output the installation.

(b) each circuit ought to be protected against taking excess energy by fuse or circuit-breaker, they must be of ample capability, properly placed, free from danger by the hearth and simply renewable.

(c) All motors and different equipment ought to be protected by connected switch or circuit-breakers of ample capability installed close to the motor, or the equipment in order that they will be simply operated by the person in charge to chop out the availability entirely.

d) This insists on use of insulation which is able to retain its properties underneath chumminess and hot conditions met with throughout operating.

(e) This clause needs that no live components area unit of exposed on cause danger.

Rule No. 51:

(a) All conductors aside from overhead lines ought to be boxed-in in a very automatically robust metal casing or covering that is electrically and properly protected

(b) All metal works enclosure, supporting and connected with the installation (except live conductors) should be earthed.

(C) a transparent area of a minimum of 3' wide  ought to be provided ahead of the plug-board. If the plug board has base connections behind, it shall be either but 9" or over 30" from the wall and there shall be passage method at each ends within the latter case.

Rule No. fifty two : the buyer is liable for the upkeep of the installation during a shape in any respect times and conjointly liable for provider equipment put in in his premises.

Rule No. fifty four and 55: The provider shall not allow the voltage at the purpose of offer to vary by over five-hitter just in case of low and medium voltage and over twelve.5% just in case of H.I. and E.H.T. The provider shall not vary the frequency by over three-dimensional.

Rule No. 56: 

(a) This insists on the grounding of a three phase four-wire system. the world association could embody a link for the aim of gap for take a look at.

(b) The frames of all generators, motors, transportable equipments, and golden frames, switches circuit-breakers, etc. ought to be connected by 2 separate and distinct connections with the world.

(c) All passage frames and golden covers shall be connected by a decent mechanical joint to take care of electrical continuity of earth. All grounding systems shall be tested before commencement of offer.

Rule No. seventy : appropriate arrangement for automatic discharge static condenser shall be created on disconnection of offer.

Rule No. 71: 

(a) This deals with high voltage Ne signs. It insists on safe installation to stop access to unauthorised persons.

(b) To effectively forestall H.T. secondary on the electrical device coming back into contact with L.T. supply.

(c) All live elements ought to be protected against injury by weather and isolated to stop spreading of fireside just in case of accidents.

(d) The secondary of a electrical device and therefore the core ought to be earthed.

(e) The transformers shall be a final sub-circuit.

(f) when a number of transformers are utilized, the load within the primary circuit shall not exceed one,000 potential unit amp.

(g) when the installation is exterior to a building, fire proof link switch shall be provided at a height of no more than 9' from the bottom.

(h) A caution notice to open the L.T. shall be fastened during a conspicuous place of the electrical device enclosure. The electrical inspector ought to be notified in writing before the installation is brought into use.

Rule No. seventy three Joints: the final word strength of the joints shouldn't be but ninety fifth of the conductor and electrical physical phenomenon adequate the conductor.

Rule No. 75. Material and Strength: 

one. 7.0 lbs breaking strength of the conductor used in overhead line. 

2. Minimum three hundred lbs breaking strength of the conductor for span but 50' and low voltage. 

Rule No. 76: most stress issue of safety: issue of Safety:

(i) For metal supports two.0. 

(i) For automatically processed concrete supports 2.5.

(iii) For hand-molded concrete supports two.5. 

(iv) For wood supports three.5.

Rule No. 77: this needs a minimum clearance of twenty (6.005 m) from the bottom of any overhead line.

Rule No. seventy eight : Clearance on top of ground of lowest conductor the conductor height across street:

(a) For low and medium voltage 5.791 m (19 foot.)

(b) for high voltage lines 5.096 m (20 foot.) 

The conductor height on street:

(a) For low and medium voltage 5.486 m (18 ft). 

(b) for prime and medium voltage 5.791 m (19 ft).

The conductor erected elsewhere ought to be 4.572 m (15') high if clean and 13' if insulated.

(a) For on top of eleven,000 V height ought to be five.182 m (17').

(b) For extra high voltage 5.182 m (17") +0.305 m (1) each 33,000 V on top of thirty three,000 V.

Rule No. 79: this needs a clearance of two.439 m (8') was the best point of a building and wherever the road passes adjacent to a building a horizontal clearance of one.219 m (4) from the nearest purpose.

Rule No. 80: 12' for up to and including 33,000 V.+1 A for every extra thirty three,000 V, vi horizontal up to thirty three,000 V, and +1 ft. for every extra 33,000 V.

Rule No. 85: most interval between supports sixty seven.056 m (200 foot.)

Rule No.88. Guarding:Guarding ought to have 635.02 kg. (1,400 lbs) breaking strength and galvanized If it's manufactured from steel or iron and each guard wire ought to be earthed.

Rule No. 90. grounding : associate earth running with overhand line ought to be normal earth at four places in one mile (1.609 km).

Rule No. 91: needs use of suppressor for overload lines.