Uploaded May 2026 | Updated September 2026, 3 weeks ago
This is one of those bonding questions that splits electricians straight away.
The gas pipe had been cut off, the clamp had been removed, and it was no longer supplying anything. Visually, plenty of people would walk past it. But electrically, that old buried metal pipe could still be connected to the general mass of earth.
So instead of guessing, we tested it.
In this video we use a TIS MFT Pro to check whether a redundant gas pipe is an extraneous conductive part, and the result tells us exactly why bonding is not simply about whether something is metal.
We look at main protective bonding, electrical earthing, continuity testing, resistance to earth, the 22,000 ohm guidance value, touch voltage, gas pipe bonding, copper pipework, plastic pipe transitions, RCD protection, EV charger survey checks, BS 7671, Guidance Note 8, exposed conductive parts and extraneous conductive parts.
The key point is simple. Some metal parts can introduce a potential into an installation, some cannot. Some look dangerous and test fine. Some look dead and test very much alive.
Would you have bonded this pipe, ignored it, or tested it first?
Drop your answer in the comments.
Learn more about the TIS MFT Pro 👉 hub.efixx.co.uk/TISMFTPRO
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Timestamps⏱️
00:00 The bonding question that causes arguments
00:28 The old gas pipe in the floor
01:02 Why this came up during an EV survey
01:33 Touch voltage explained properly
02:11 Why the installation is isolated first
02:37 The 22,000 ohm guidance value
03:06 Setting up the continuity test
03:33 The 54 ohm result
03:54 Why that result matters
04:13 Testing the kitchen island pipework
04:37 Does the radiator need bonding?
04:58 Plastic outside, metal inside
05:20 Extraneous conductive parts explained
05:39 Exposed conductive parts explained
05:54 Why testing beats guessing
====================
#electricalinstallation #electricalwork #electricians
This is one of those bonding questions that splits electricians straight away.
The gas pipe had been cut off, the clamp had been removed, and it was no longer supplying anything. Visually, plenty of people would walk past it. But electrically, that old buried metal pipe could still be connected to the general mass of earth.
So instead of guessing, we tested it.
In this video we use a TIS MFT Pro to check whether a redundant gas pipe is an extraneous conductive part, and the result tells us exactly why bonding is not simply about whether something is metal.
We look at main protective bonding, electrical earthing, continuity testing, resistance to earth, the 22,000 ohm guidance value, touch voltage, gas pipe bonding, copper pipework, plastic pipe transitions, RCD protection, EV charger survey checks, BS 7671, Guidance Note 8, exposed conductive parts and extraneous conductive parts.
The key point is simple. Some metal parts can introduce a potential into an installation, some cannot. Some look dangerous and test fine. Some look dead and test very much alive.
Would you have bonded this pipe, ignored it, or tested it first?
Drop your answer in the comments.
Learn more about the TIS MFT Pro 👉 hub.efixx.co.uk/TISMFTPRO
====================
Timestamps⏱️
00:00 The bonding question that causes arguments
00:28 The old gas pipe in the floor
01:02 Why this came up during an EV survey
01:33 Touch voltage explained properly
02:11 Why the installation is isolated first
02:37 The 22,000 ohm guidance value
03:06 Setting up the continuity test
03:33 The 54 ohm result
03:54 Why that result matters
04:13 Testing the kitchen island pipework
04:37 Does the radiator need bonding?
04:58 Plastic outside, metal inside
05:20 Extraneous conductive parts explained
05:39 Exposed conductive parts explained
05:54 Why testing beats guessing
====================
#electricalinstallation #electricalwork #electricians
