malewithatail
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Location: Northern Rivers NSW
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Post by malewithatail on Jan 8, 2024 14:22:42 GMT 10
And plugging in a 240 v plug with all 3 terminals linked together, turning on the power point after the circuits have been de-energized (although, one would expect that a dead short from active to neutral to ground would trip a correctly rated breaker anyway !).
That should reduce any residual circulating currents in the house wiring to zero.
Anyway, that's my plan....
The best laid plans of mice and men..."what have men got to do with it ?" - Hitchhikers guide to the galaxy - Ford Prefect.
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malewithatail
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Location: Northern Rivers NSW
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Post by malewithatail on Jan 12, 2024 14:11:33 GMT 10
I needed to do an insulation test on a piece of equipment this morning, so got out my 500/1,000 volt insulation tester (usually abbreviated by those in the trade as a Megga, but that's a brand name), and .....it didn't work. The battery's were dead. No issue, as I was at home, I got out my 1950's hand cranked, 500/1,000/2,000 volt taut band Megger brand, tester and completed the tests.
Rummaged around inside and found 8 AA penlight battery's, and all's well. But, that got me thinking....again !
How many pieces of test equipment did I have that needed battery's to function. Apart from the aforementioned Megger, there are several digital multi-meters and circuit tracers etc. All need some sort of battery.
What if there were no more battery's available from a non existent shop ?
Luckily, I have several older analogue type multi meters that only use a battery for the resistance scales, and function quite happily without any power source for voltage and current measurements. I have an old Radio Shack (Tandy) 1k ohm/volt pocket type and several Hioki taut band types that are rated for drop proof to 1 meter. These also don't require a battery to operate, apart from the ohms ranges. There are several other older 1940's style types that are well and truly out of calibration, but look cool in their leather cases and with large glass dials.
A multi meter is probably not going to be an urgent requirement WTSHTF, but eventually you are gonna need to fix something, and having a meter that doesn't require any power source will be invaluable on that day.
Nobody knows what the White House is doing, especially not the White House.
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