- 40%
- 50%
- 60%
- 30%
- None of these
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
All conductors of an earthling system shall have conductivity, at all parts & all joints at least equal to 50% of the largest conductor used?
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