Difference between revisions of "Earthing Types"

Revision as of 10:00, 6 January 2007

BS 7671 lists five types of earthing system:

 TN-S 
 TN-C-S 
 TT 
 TN-C
 IT

Where those letters each indicate:

 T = Earth (from the French word Terre)
 N = Neutral
 S = Separate
 C = Combined
 I = Isolated

A useful link to an IEE PDF on the subject (presumably most DIYers can ignore the section on earthing caravan pitches) [1]

@@ Line 3: / Line 3: @@
 http://groups.google.co.uk/group/uk.d-i-y/msg/14a0b8a90fca226b
-A useful link to an IEE document in PDF format
+BS 7671 lists five types of earthing system:
-[http://www.iee.org/Publish/WireRegs/WiringMatters/Documents/Issue16/2005_16_autumn_wiring_matters_earthing_your_questions_answered.pdf]
+  TN-S
+  TN-C-S
+  TT
+  TN-C
+  IT
+Where those letters each indicate:
+  T = Earth (from the French word Terre)
+  N = Neutral
+  S = Separate
+  C = Combined
+  I = Isolated
+A useful link to an IEE PDF on the subject (presumably most DIYers can ignore the section on earthing caravan pitches) [http://www.iee.org/Publish/WireRegs/WiringMatters/Documents/Issue16/2005_16_autumn_wiring_matters_earthing_your_questions_answered.pdf]