> I have no idea how serious these reasons actually are.
Basically, the grid was built with the assumption that plants produce power, and that households only consume it. That means opening a breaker between the transport grid and the distribution lines should allow to safely work on the consumer-bound side.
That assumption no longer works if consumers energize the network, and while I assume workers have safety guidelines to check the line before starting work, there is still a risk.
Fixing this issue would require new remotely-operated breakers to be installed, which is costly, and it's hard to justify installing them proactively just in case.
Basically, the grid was built with the assumption that plants produce power, and that households only consume it. That means opening a breaker between the transport grid and the distribution lines should allow to safely work on the consumer-bound side.
That assumption no longer works if consumers energize the network, and while I assume workers have safety guidelines to check the line before starting work, there is still a risk.
Fixing this issue would require new remotely-operated breakers to be installed, which is costly, and it's hard to justify installing them proactively just in case.