EICR reports

HUMBUG

It's strange that I found out by accident that my shower unit can be dangerous. It seems that the person who fitted it back in 2001 actually broke the regulations in place at that time . The current 9.5kw electric shower unit should have had 10mm square wiring connected via an 45 Amp B-Type RCBO . To use 6mm square wiring via a 30A fuse box has endangered me. It's also going to cause me grief and expense because I will now have to use surface trunking on top of my fully tiled bathroom (ie. the existing wiring is behind a false stud wall). The aesthetics will take a dive but at least I am preventing a possible fire in the wall cavity area and I'll be able to replace the old faulty unit with the one I've just bought for £171.

I suspect when I sell my property , the bathroom will probably get refurbished again by the new owner.

Looking at the possible route for surface trunking , he will have to feed it from the new RCBO, up and across the top of my kitchen wall, through the cupboard containing my hot water tank , drill holes into my bathroom , then feed it across the top of the false wall , then down toward the electric shower unit. I suppose he'll need to ensure the cable is long enough for a plumber to then visit and cut down the cables to size for fitting into the new shower unit terminals. That's about 8-9 metres of surface trunking so uncertain how much this is going to cost me in the Greater London area.

HUMBUG

I've been asking AI for summary advice after inputting all the details regarding my property and the EICR report. This is it's final summary and I know it could contain errors but seems okay to me.

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                    ELECTRICAL WORKS SPECIFICATION & SCOPE
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PROPERTY DETAILS:
- Ground floor 1-bedroom maisonette (Greater London)
- Status: Requires works to upgrade 'Unsatisfactory' EICR to 'Satisfactory'
- Note: Existing lighting and socket insulation resistance tests are healthy (500 MΩ)

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1. CONSUMER UNIT UPGRADE
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- Remove the outdated 70-year-old under-stairs fuse box and separate 30A shower box.
- Supply and install a modern, 18th Edition Amendment 3 compliant metal consumer unit.
- The new board must utilize individual RCBOs. 
- The new shower circuit MUST be placed on its own dedicated 40A/50A RCBO to 
  isolate potential faults and prevent total property blackouts.
- Re-terminate existing lighting and socket circuits safely onto the new board.

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2. NON-EARTHED LIGHTING CIRCUIT MANAGEMENT
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- Note: The legacy lighting circuit does not contain a circuit protective conductor (CPC).
- Contractor to verify that 100% of light switches and fittings are entirely plastic.
- Contractor to install insulated plastic screw caps/covers over all light switch 
  faceplate screws to eliminate touch-voltage shock risks.
- Apply the mandatory "No Earth" safety warning sticker to the new consumer unit faceplate.

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3. NEW RADIAL CIRCUIT ONLY (FULL CEILING ROUTE & CABLE TAIL FOR AQUALISA E2)
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- Safely decommission, isolate, and remove the existing 6mm² shower cable line.
- NOTE: Electrician is NOT installing the shower unit. Shower installation to be done 
  by others. Electrician is strictly providing the first-fix electrical supply.
- CRITICAL CONSTRAINT: Ceiling void, party walls, and floor perimeter pipe boxing 
  must remain 100% untouched. No tiles are to be broken.
- Run a brand new 10mm² copper radial circuit from the new consumer unit under the stairs.
- Route the cable via neat surface trunking running along the top edge of the 
  kitchen ceiling (skirting boards are to be kept completely clear).
- Punch directly through the internal partition wall into the bathroom at high level/ceiling height.
- Route the 10mm² cable inside the bathroom using D-Line trunking (or equivalent) 
  fixed horizontally along the wall-to-ceiling intersection.
- Drop trunking vertically down the tile corner toward the target shower location.
- CRITICAL: Leave a generous 50cm to 100cm un-terminated service loop/tail of 10mm² 
  cable safely isolated, capped off, and dangling at the final position. This is to 
  allow a secondary tradesperson enough slack to adjust and wire in the Aqualisa E2.
- Trunking must be fixed with heavy-duty polymer grab adhesive and fully sealed 
  along all edges with anti-mould sanitary silicone.

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4. TESTING & CERTIFICATION
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- Carry out full electrical testing upon completion of works.
- Provide a formal Electrical Installation Certificate (EIC) for the consumer unit 
  upgrade and the new radial circuit, enabling the property to achieve a 
  "Satisfactory" EICR grading.
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Heedtheadvice

So you agree it could contain errors...but seem to think it is OK?

I expect that the shower ought to have an isolator fitted...just as one example, I think there is more but not really in a position to advise at distance.

Really best that a competent person decides what is required rather than AI IMHO!