So, Just What is Going on Here?

Another image..

Upside down cut out (not unusual when fed from above), unused DNO's earth facility, upfront 80A/30mA RCD. Bit of parcel tape over the cut-out PE terminal (seen worse). Can't see if there's a connection to a local electrode somewhere, but on the surface looks like a TT installation that's ready for a PME conversion.

   - Andy.

And the double pairs of outgoing tails?

Z.

AJJewsbury said:

looks like a TT installation that's ready for a PME conversion

Or it was once PME and is now TT.

The sheath on those tails looks a bit inadequate.

And the double pairs of outgoing tails?

Off to a 2nd CU somewhere to the right?

I agree the sheaths look to be a bit roughly cut-back around the Henley block.

   - Andy.

But the local D.N.O. guys did apply some electrical insulating tape.

Z.

Personally I'd prefer the Henley block the other way up - it's difficult to maintain IP4X on the top surface with holes for the cables.

   - Andy.

Well here is the full story. A new smart meter was fitted. Reports were made to the local D.N.O. that the 16.0mm2 tails were too small with the new 100 Amp main fuse, and 25mm2 tails were recommended. The Henley block had inner insulation showing at the tails and the D.N.O./meter gur applied tape. The second set of old tails runs about 5 metres to the right to another consumer unit. Rather than replace the old long tails, a switch fuse was installed at their origin and a new 100 Amp Henley block. Now a previously unused P.M.E. earthing terminal is available the one and only R.C.D. has been removed and the two consumer units each have their own 30mA R.C.D., but not perhaps new A types. Well, there is only so much that customers will pay for this type of work.

The alterations taking place. The main earthing conductor is yet to be installed and the covers replaced. Several tightening down of the screws were made before the covers were replaced.

Interestingly, the old stock 25mm2 tails were great to bend and work with as they were about 30 years old and the copper was very easy to bend.

The new switch fuse had an 80 Amp H.R.C. fuse fitted.

Z.

a switch fuse was installed

Looks like a domestic installation ... does the new switchfuse comply with 421.1.201?

   - Andy.

Absolutely, just like the head, main switch, Henley block and meter. Obviously the consumer units are made of a plastic material, but the customer did not request their replacements.

Product Key Features

Z.