Industrial Installation, Changing major components on the input.

I'm seeking advice on the necessary sign-off procedures for replacing a voltage optimization unit.

The specific work involves removing an existing unit and installing a new one. All cabling will remain in place, but it will need to be re-terminated to connect to the new unit.

The voltage optimization unit is located between the main incoming supply and the low-voltage distribution board.

Is it mandatory to have the work signed off by a registered electrician from a recognized body like NICEIC or ECA, even though it's a like-for-like replacement?

All engineers doing the replacement are 18th Edition Qualified. 

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  • could the client use their own in-house staff, if they have they have the appropriate abilities?

    Under CDM, they are still the 'Contractor' ... regardless of which legal entity undertakes the role. Similarly, a single organisation (or even 'individual human person') could theoretically be Client, Contractor and Designer.

  • Under CDM, they are still the 'Contractor'

    Ah, OK - thanks. A new meaning of the word "contractor" I wasn't previously aware of! I can see that's that sort of short-cut that's often used in some texts, but also see it being misinterpreted by the casual reader...

       - Andy.

  • Yes, even though it seems a little odd - many disputes are between client and contractor.

    CDM Regs 2015, R2: Interpretation

    client” means any person for whom a project is carried out;

    contractor” means any person (including a non-domestic client) who, in the course or furtherance of a business, carries out, manages or controls construction work;

    designer” means any person (including a client, contractor or other person referred to in these Regulations) who in the course or furtherance of a business—

         (a) prepares or modifies a design; or
         (b) arranges for, or instructs, any person under their control to do so,
    domestic client” means a client for whom a project is being carried out which is not in the course or furtherance of a business of that client;
    A person may be a flesh and blood person, or a legal person, e.g., a company. Nonetheless, how is competence demonstrated?