You've got me looking now ! Part A Building regs. Vertical chase maximum 1/3 of the inner leaf. Assuming 4" leaf thats a 1.3" chase in the wall (not the plaster or whatever finish there is). Sorry to revert to "mm" now but that gives a minimum of 18mm (ish) finish to play with, you should just...
Building regs state that you must not form a bridge between the inner and outer leaf of the cavity wall which would allow damp to cross, you could use the cavity if you can ensure this did not happen. Not very easy to achieve in practise.
Building regs state that you must not form a bridge between the inner and outer leaf of the cavity wall which would allow damp to cross, you could use the cavity if you can ensure this did not happen. Not very easy to achieve in practise.
NICEIC rules state that you the Customer should ask the Contractor for a complaints form which he must provide you with. Failure to do so I believe would result in his expulsion from the "Club".
In my opinion it is a poor report anyway. The summary of the condition of the installation has 2...
To cover you behind send the customer a Danger Notice without delay. It looks too far gone to be cured by tightening the screw up. What do you mean by IR is open circuit (OC) ?, if it is how have you got satisfactory r1+r2 ? You have what is known as "guilty knowledge" of a potential fire...
If you call it by the old description PME (protective multiple earthing) it makes more sense. For safety, in case the neutral becomes open circuit in the distributors network the neutral is "earthed" at "multiple" points along its run. I can see no issue with this arrangement that you show...
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