Details of BS7671:2018 Amendment 1 are here.

This thread shows an interesting perception of risk. Traveling by car is one of the most dangerous activities most of us do. There are around 5 deaths per day.


What is the risk of death or serious injury due to earthing problems in the car charging system. It was quoted that there is possibly one broken PME event per day but this in itself does not result in death or injury, several other concurrent events are also required. Someone must be attempting to plug in or unplug the charging cable while the PME failure is present. They must have contact with two separate conductive objects. The contact resistances must be low enough that a harmful current flows. How often will this happen? The UK seems to have around 1 death per year due to earthing problems. How much will this increase with a large roll out of vehicle charging systems? Is 3 phase supplies that much of a problem. Most properties on the mainland have 3 phase supplies without apparent increase in risk.


Best regards


Roger

This thread shows an interesting perception of risk. Traveling by car is one of the most dangerous activities most of us do. There are around 5 deaths per day.


What is the risk of death or serious injury due to earthing problems in the car charging system. It was quoted that there is possibly one broken PME event per day but this in itself does not result in death or injury, several other concurrent events are also required. Someone must be attempting to plug in or unplug the charging cable while the PME failure is present. They must have contact with two separate conductive objects. The contact resistances must be low enough that a harmful current flows. How often will this happen? The UK seems to have around 1 death per year due to earthing problems. How much will this increase with a large roll out of vehicle charging systems? Is 3 phase supplies that much of a problem. Most properties on the mainland have 3 phase supplies without apparent increase in risk.


Best regards


Roger