engineering recuitment NMDC Junior Officer (Trainee) Mock Test 2024 Estimation and Costing

Under IS 2309:1989, what is the recommended insulation resistance (in meg-ohms) for electrical installations in mines?

1

a) 1 MΩ

2

b) 10 MΩ

3

c) 50 MΩ

4

100 MΩ

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