Ralph Mowery wrote:
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I have a Fluke t100 that is made as an electricians test meter. I have
put it across some 240 volt circuits while set on ohms and no effect to
the meter.


** That is not unusual, it is easy to protect the ohms ranges of a DMM from voltages up to 240VAC.
Along with being ( almost) drop proof, it is one of the great benefits of DMMs compared with analogue types.

The main safety features of a good multimeter are that the 4mm plugs are self shrounding and the battery compartment needs a tool to access. Goes a long at toward preventing accidental contact with dangerous voltages.

Meters with unfused *high current* ranges are a hazard around car batteries and the like, as the leads can smoke, burn or even explode.
Not likely at all with mains power as gross overload trips breakers *instantly*.

..... Phil