Attended call out at shop. Freezers, chillers and tills were down. Using MFT on V. measurement got 235V plugged into socket. Tested inside socket at terminals with drummond tester, nothing 0 V. Switched MFT to Loop and the neutral was missing. Just a bit puzzled why the MFT shows V. and Drummond 0 V. The neutrals in the neutral block had cooked away, loose neutrals and so on. I would post a pic but the forum does not allow me to post any pics any more.
interesting...... soon as i've had my breakfast smoke to kick-start the old lungs, going to have to connect 1553 to a socket with the N dissed.see what it says. no animals will be hurt during the course of the experiment.
I did not use single leads I used the three lead one with the plug top on the end by the way. If you use two single leads you have to use L and PE on my MFT.
This is wrong and a dangerous misunderstanding.
If only one conductor is present then by definition there is no voltage present. The only tester that only needs one pole is a volt stick and we all know about them.
You can test between all conductors in an accessory as no volts and still have a dangerous voltage present. This would be especially likely in a light switch without earth and looped at the rose.
If you want to test you really need to test against all terminals and all exposed metallic items in t vicinity. Imagine touching an earthed radiator at the same time as a live light switch.
This is wrong and a dangerous misunderstanding.
If only one conductor is present then by definition there is no voltage present. The only tester that only needs one pole is a volt stick and we all know about them.
You can test between all conductors in an accessory as no volts and still have a dangerous voltage present. This would be especially likely in a light switch without earth and looped at the rose.
If you want to test you really need to test against all terminals and all exposed metallic items in t vicinity. Imagine touching an earthed radiator at the same time as a live light switch.
And this is why I use and carry a voltstick as a double-check, as it is not always practical to run a flylead to a trustworthy source of earth reference. One lead of a DMM with the other one dangling free, capacitively coupled to the outside world, will also often indicate this situation.
The Fluke T90 voltage tester I use gives an indication of voltage present even if only one pole is connected, it serves as a warning even if it does not indicate actual voltage relative to 0v reference on the second probe. This is much safer than a tester which will only read if both poles are connected to a voltage.
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