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Questions about protecting electrical devices from voltage spikes.

7 votes

Do I need a MOV in front of AC/DC supply

You could buy an MOV with a built-in thermal fuse. That way, if the MOV fails short circuit, it will disconnect itself permanently, and the rest of the power supply carries on as normal.
Simon B's user avatar
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0 votes

Multimeter blown trying to measure 125 V in the 600 V AC range

Many multimeters have separate volts and amps sockets. Perhaps you switched it to volts, but plugged one of the probes into the amps socket.
Simon B's user avatar
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2 votes
Accepted

Could ground faults in the same building affect my anti-static grounding plug?

The main advantage of an anti-static workstation is that it keeps everything at the same voltage. There's usually a conductive rubber mat and a wrist (or heel) strap for the operator. The mat and the …
Simon B's user avatar
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0 votes

How reliable are "earthing detectors" on surge protections?

The most likely method of checking the grounding is to pass a very small current from live (hot) to ground, while monitoring the voltage. At it's simplest, this could be an LED or neon lamp, with a v …
Simon B's user avatar
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