- Once in 4 months
- Once in 3 Months
- Once in 6 months
- Once in a year
- None of these
Switch gear & protective equipments shall be checked Once in 3 Months
- 750 mill ampere
- 50 mill ampere
- 75 mill ampere
- 50 ampere
- 5 ampere
In restricted earth neutral system of power supply for voltage exceeding 1.1 KV (1100 Volts) & up to 11 KV in O/C mines should be limited to 50 ampere
- 650 mill ampere/250 volts
- 550 mill ampere/250 volts
- 750 mill ampere/200 volts
- 750 mill ampere/250 volts
Where a fault including an earth fault current shall not be more than 750 mill ampere in installation of voltage exceeding 250 volts
- 1:4000 (25 cm to a km)
- 1:2000 (21 cm to a km)
- 1:4000 (50 cm to a km)
- 1:3000 (25 cm to a km)
1:4000 (25 cm to a km)
- Position of all fixed apparatus
- Conductors
- Telecommunication / Signalling apparatus / Cables
- All of the above
- B & C
- A & C
All of the above plans need to show.
- 1m+0.3m / 33000 Volts
- 2m+0.5m / 3300 Volts
- 2m+0.3m / 33000 Volts
- 1m+0.3m / 11000 Volts
Voltage exceeding 33 KV the clearance above ground should not be less than 2m+0.3m for every 33000 volts provided that the minimum clearance along/across any street shall not be less than 6.1 m?
- Elsewhere Along/Across 4.6 m
- Elsewhere Along/Across 4.0 m
- Elsewhere Along/Across 5.2 m
- Elsewhere Along/Across 6.5 m
Voltage exceeding 11000 volts but not exceeding 33 KV Elsewhere Along/Across 5.2 m
- Elsewhere Along/Across 4.6 m
- Elsewhere Along/Across 4.0 m
- Elsewhere Along/Across 6.5 m
- Elsewhere Along/Across 5.2 m
Voltage up to 11000 volts if Bar Elsewhere Along/Across 4.6 m
- Elsewhere Along/Across 5.2 m
- Elsewhere Along/Across 4.0 m
- Elsewhere Along/Across 4.6 m
- Elsewhere Along/Across 6.5 m
Voltage up to 11000 volts if Insulated Elsewhere Along/Across 4.0 m
- Across street 5.8 m / Along street 4.6 m
- Across street 5.2 m / Along street 6.1 m
- Across street 6.1 m / Along street 5.8 m
- Across street 6.1 m / Along street 4.6 m
Voltage Exceeding 650 volts but Not Exceeding 33 KV. Across street 6.1 m / Along street 5.8 m
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