Topic summary
Earthing arrangements

Extracted from the Wikipedia article Earthing system.
IEC terminology
International standardIEC 60364 distinguishes three families of earthing arrangements, using the two-letter codes — TN, TT, and IT.
Topic summary

Extracted from the Wikipedia article Earthing system.
International standardIEC 60364 distinguishes three families of earthing arrangements, using the two-letter codes — TN, TT, and IT.