State

EI issues electrical safety notification

DIMAPUR | Publish Date: 1/18/2019 12:15:15 PM IST

 In pursuance of the Indian Electricity Rules, 1956, the office of the chief electrical inspector, Electrical Inspectorate (EI), Kohima, has issued a notification in the interest of public information and safety and to bring to the notice of the Electrical Inspectorate any breach in the rules so as to prevent any electrical accidents involving electrical lines.

1. IER, 1956 (79) Clearances from buildings of low and medium voltage lines and service lines (11,000 volts and below)

(1) Where a low or medium voltage, overhead line passes above or adjacent to or terminates on any building, the following minimum clearances from any accessible point, on the basis of maximum sag, shall be observed :

(a) For any flat roof, open balcony, verandah roof and lean-to-roof –

(i) When the line passes above the building a vertical clearance of 2.5 metres from the highest point and

(ii) When the line passes adjacent to the building a horizontal clearance of 1.2 metres from the nearest point, and

(b) For pitched roof –

(i) When the line passes above the building a vertical clearance of 2.5 metres immediately under the lines, and

(ii) When the line passes adjacent to the building a horizontal clearance of 1.2 metres.

(2) The horizontal clearance shall be measured when the line is at a maximum deflection from the vertical due to wind pressure.

2. IER, 1956 (80) Clearances from buildings of high and extra-high voltage lines (11,000 volts and above)

(1) Where a high or extra-high voltage overhead line passes above or adjacent to any building or part of a building it shall have on the basis of maximum sag a vertical clearance above the highest part of the building immediately under such line, of not less than –

(a) For high voltage lines upto and including 33,000 volts: 3.7 metres

(b) For extra-high voltage lines: 3.7 metres plus 0.30 metres for every additional 33,000 volts or part thereof.

(2) The horizontal clearance between the nearest conductor and any part of such building shall, on the basis of maximum deflection due to wind pressure, be not less than –

(a) For high voltage lines upto and including 11,000 volts 1.2 metres

(b) For high voltage lines above 11,000 volts upto and including 33,000 volts 2.0 metres.

(c) For extra-high voltage lines 2.0 metres plus 0.3 metres for every additional 33,000 volts for part thereof.

(For the purpose of these rules, expression “building” shall be deemed to include any structure, whether permanent or temporary)


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