Industrial Installation, Changing major components on the input.

Question

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.

alanblaby · Answer

Basically no. They must be competent. That's it. 
 NICEIC/NAPIT are generally more geared toward the domestic market, with a smaller proportion of their Members working on commercial/industrial. ECA is for larger Companies, being a Member could show they are competent, but it isnt certain, as Companies registered with NICEIC can have one Employee who is the Quality Supervisor, and is ultimately responsible for the work, but, the workers need no accreditation, so a labourer could do the work with the QS signing it off. It does happen, I've worked on sites where there has been no supervision of a number of workers, none of whom had more than the most basic of electrical qualifications. 
 The ability to know what they are doing is in the correct way, and testing the work afterwards to make sure it is safe is more important than being a member of a governing body. 
 Your Insurance Company may differ in their views

gkenyon · Answer

The work is covered by CDM Regulations (regardless of whether or not it is classed as 'maintenance'). The Client has to appoint a competent contractor to do the work ... the Contractor cannot start work unless they are satisfied the Client knows their duties under the Regulations, and has appointed, where necessary, competent persons to fulfil their duties under the Regulations.

Industrial Installation, Changing major components on the input.

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