BIt of advice required here please.
At the "day job" we are required to measure feeds that need a Category IV meter:-
"used on locations where fault current levels can be very high, such as supply service entrances, main panels, supply meters and primary over-voltage protection equipment."
We have a set of good quality Fluke multimeters that comply with that requirement on the voltage setting that have been in use for a number of years. However, during a recent review of safety a question mark has been raised about using such multimeters in situations where high voltages and extremely large amount of current are available. The reason for the question mark is that it is possible that the meters could initiate an arc / flash-over condition if the multimeter were to be set to measure resistance when measuring is attempted.
The obvious solution would be to specify meters that can solely measure voltage - i.e are not multimeters. The problam appears to be these are as rare as rocking poo. Does anyone have a recommendation, or does anyone work for a utility company that needs to Cat IV equipment if so, what do you use.