Physics · Electrical Installations
Pipe electrodes used in earthing installations must be made of:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1plastic pipes with sufficient wall thickness
- 2painted or insulated metal rods
- 3ceramic materials with conductive coating
- 4a metal rod or pipe with a clean unpainted surface✓
Correct answer
a metal rod or pipe with a clean unpainted surface
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