Posted By s_jesu We are erecting a new panel in a existing MCC room, so we need to break the concrete floor for cable entry. My question is whether we need to apply for a total isolation for the MCC room, which is already operating for the existing plant. Is there any regulations supporting to this activity. please give some inputs Cheers Jesu

Posted By s_jesu thanks john I have checked the method statement and risk assessment, No where its mentioned for an isolation or shut down..I want to ensure with the regulations.. cheers jesu

Posted By David Rodger Beware, I know of a similar job where the civil contractor had an accident when the breaker he was using slipped and hit a live cable. Luckily he survived but this did result in a shutdown of the plant. During the investigation it was found that he had deviated from the original scope of the works and the protection for the cables was not in place. However a point that the HSE investigation and subsequent court action brought out was, “did anyone actually ask the client if the power could be shut down”. There was a lot of assumption that it could not be shut down and the job was planned using that assumption. The HSEs view however was that as no one had asked if the power could be isolated then the contractors were negligent in that they had not done everything possible to avoid working on or near live conductors.