On Mar 12, 1:35*pm, "HeyBub" wrote:
wrote:

Wouldn't that resistor get hot pretty fast when across 110v or 220v?
Seems to me it would have to be a pretty large wattage resistor, not
just a quarter or half watt one. *And even a heavy duty 50W resistor
would probably get hot enough to burn your skin really fast.

Not if the resistance was quite high.

If I = E/R where E=220 and R=(more zeros than the stimulus) the resulting I
(current) is teeny.

If R = (say) 220K, you get I = 220 / 220,000 = *1 ma.

Power, then, is EI = 220 x .001 = .220 watts or 1/4 watt.




Yes, you got me on that one guys. I didn't have my brain fully
engaged. I was thinking more along the lines of the principle, which
is you can turn a high impedance digital meter into a lower one by
using a resistor in parallel. Something along the lines of 100K
would work, which would give you 1/2 watt at 220V.







I think
I'd rather get a $10 cheap meter. *Besides that, a costly Fluke
digital meter is too costly to use on a construction job where it will
likely get dropped or worse. *I'd rather leave it on the bench, and
use a cheap meter that wont make you cry if you drop it- Hide quoted text -

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