There are three levels of competence recognised within BS 7671:
An instructed person
An Ordinary person
Everyone must be trained to do the task they are allotted to do. The electrotechnical industry is a skilled occupation,.
There are several schemes available for checking the identity and competency
CSCS – Construction Skills Certification Scheme
To hold a CSCS card the employee must have demonstrated their occupational competence and, in most cases, passed the Construction Skills Health and Safety Test within the previous two years.