Where the operator has made it known in writing that he is unable, for a reason he considers to be imperative, to de-energise the electrical line, pipe or installation in the vicinity of which the work is to be carried out, the employer shall, before the work begins and in agreement with the operator, determine the safety measures to be taken.
The employer shall inform the workers of these measures by means of the instructions provided for in Article R. 4534-125.