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This is a great lesson for someone trying to get into sound and communications

I remember years ago at a newspaper site that the clean Earth had plug and socket arrangement whereby the Earth pin had been rotated 90 degrees meaning only kit with the plug could use the clean earth arrangement. Stopped cleaners and maintenance personnel using thoses dedicated circuits for hoovers or worse still drills.

Great video explaining clean earth systems. This is often a much misunderstood concept. This system is also often used for audio systems to help prevent hums in the system from circulating currents in the earthing system. The key is to not have any loops in the clean earth cabling. Must be ‘star’ or ‘radially’ wired. No ring circuits allowed!

You mention "IT Equipment" a lot in this video, but I've been in IT for 20+ years and have never once seen a Clean Earth anywhere amongst the equipment.

EMC is Electromagnetic compatibility, EMI is Electromagnetic Interference. Electromagnetic contamination is not a generally used term.

Unfortunately I have come across sockets replaced on clean earth systems with standard sockets and the plastic pattress screws replaced with metal ones . In my many years of being a sparks ,Earthing arrangements are misunderstood or bodged or people don't believe and earth is important, we all seen earthing conductors missing or be cut off

I thought the idea of having an MET and a clean MET bonded together at a single point further back towards the source was given way to more MESH bonded systems, like those described in BS EN 50310. For a local downstream example, in a comms room you would bond the distribution board for that room to the bonding earth bar that connects the I.T cabinets with dedicated bonds. You can also do this via a grid, however for most applications this is overkill.

Question as we do these occasionally. Where running SWA's out to the feeder units would you (A)run a 4 core instead of 3 (B) run a separate single earth and cable tie with existing swa and use single earth as clean earth or... (C) use a 3 core swa, use the swa along with a bango/earthing nut as the dirty earth and the core within the swa as the clean earth. We often run a cable out of the board to an earth bar and do the connections there, not really sure if this is the correct way, to me it all goes to the same place so unsure of the point. Last point, sometimes we use the track to power wall sockets also. Whilst white plastic clean earth sockets are available, decorative metal sockets aren't, what do we do with the dirty earth? Connector block in back of box?

Beautiful outlet product but why are they still even bothering installing Strip Connector Terminals with screws to wire in the cabling? Rather use 221-2411 WAGO inline connectors with 3 Way Snap In Base Plate Holders. ..

I've been to TUV Fareham a few times to get products through EMC testing. I think your viewers would very much appreciate a visit to that site if they'd allow it (and it's not too far away from you).

Nice use of the QR code to ID the riser.

Is this the same as TE/Technical Earth? Sounds a lot like the concept used in automation.

Is this system suitable for private homes or is it commercial use only?

We don't have any clean earth arrangements at my place of work, but it's interesting nevertheless.. there's probably some very interesting physics going on with that link between the general earth and the clean earth at 3:01 because to me, that just looks like the general MET and the clean MET are essentially the same thing at that linked point. I'm presuming any noise generated on the general MET takes the easiest route to earth and therefore doesn't affect the clean MET? I'd appreciate a bit more information on that part. And for anyone interested, the QR code means 'Internal>Level 02>2R13 Riser' , don't know why they don't just write that there instead of using a QR code though!

Are clean earth sockets sometimes colored red? because the powertrack for clean earth is red, so i might just ask. Some manufacturers provide sockets in Yellow and Red in my area, I never really.know why buildings used them

Hi, I hope you don't mind me wading in. As a fully qualified Radio Amateur for many years, I have some issues with this clean Earth arrangement. Firstly, the conductors are laid side by side in the ducting, so there is little to no chance of stopping EMC interference, as it is radiated by the cables, which will actually enhance the pick up of interference by acting as a receiver line. I can see no improvement whatsoever, unless you use a common mode choke method. Radio transmissions just travel between the gap, as if there was no gap, using capacitive and inductive coupling. In long Audio cable runs, it has been a well known fact that you need to run a balanced twin coaxial cable with the outer screen grounded at one end only. This stops EMC getting in, as it appears 90 degrees out of phase at the Audio desk, so is eliminated (see common mode choke theory). Secondly these are Voltage spikes not current spikes. You interchange these words far to frequently. Please replace the words current spikes with voltage spikes. Interference spikes are Voltage in nature, and appear on the cables as such, no matter where the Line curvature is. Further to, in a previous video eFIXX advocated using power line adapters for extending Wi-Fi, which introduces massive interference onto the power lines for many miles away from the property. This clean Earth system simply cannot work to reduce or eliminate EMC Voltage Spikes or noise. What am I missing.? David G1ZQC Lincolnshire.

Why not just put a bigger cpc and link it ?

This might sound silly but could this not create a situation where there is a fault to an earth, the outer casing, which is only connected to the actual circuit via the main earth terminal and back again. That's an awfully long loop. If the socket run was connected with a tough cable rather than a metal connection could the whole thing run on one clean earth. Sorry but it's a long time since I've done commercial installs, 16th I think. 👴

Since potentials are relative and not absolute, this sounds like an awful idea since noise in the ground are due to opposite currents in the power lines. Just perform proper filtering and don’t allow equipment manufacturers to induce currents in the equipment ground. Currents should return though the other line or neutral.