Earthing vs. Bonding: What's the Difference?

Electricians often get confused between earthing and bonding of an electrical installation. James Curnow explains the differences and the key references within the UK wiring regulations BS7671.

What is the difference between exposed conductive parts and extraneous conductive parts. What is equipotential bonding?

🕐 TIME STAMPS 🕕
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00:00 What is bonding what is earthing
00:16 What does BS7671 say
01:02 Exposed conductive parts
01:23 Fault conditions
01:46 Bonding
02:37 Extraneous conductive parts
02:54 TN supply
03:13 Same potential
03:49 Pipework passing through a building
04:57 Supplementary bonding
05:31 Omitted supplementary bonding
06:01 Supplementary bonding is required

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