# Re: [TCML] Power Factor Correction

```On 12/3/16 7:33 PM, Chris Boden wrote:
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```I understand that, but....with an NST powered coil, it's rather moot isn't
it?
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You're drawing more current through your variac, which will get hotter.
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And while a single 30mA 15 kV NST is only going to be 400-500 VA, if you start ganging them up in parallel, or getting a 60mA 15 kV unit, then you're getting up towards where the current draw is an issue
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I mean, you're drawing only a few hundred watts. The "wasted power" isn't
enough to trip the breaker, and the impact in your electric bill is on par
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The bill will be the same whether you have PFC or not - your meter only measures active power, not reactive power. So if you were drawing, say, 15 A @ 120V (1800VA) and the PF were 50%, your meter is only going to spin for a 900W load.
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(there's a very small effect from the IR losses in the wiring because of the reactive power, but it's "small".. IR loss is <2% with 100% PF, and only slightly more (<4%) with 50% PF
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Maybe I'm missing something, my electric bills are a little different than
most. It just seems like a lot of effort for very little tangible gains.

We certainly don't worry about it here in the lab.
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I sort of agree - there's not a lot to be gained by worrying about PF.

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On Sat, Dec 3, 2016 at 7:58 PM, jimlux <jimlux@xxxxxxxxxxxxx> wrote:

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```On 12/3/16 4:03 PM, Chris Boden wrote:

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```The question I have is......Why? Why would you want to lower the PF?

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```Total line current is less - the meter spins slowly for the current, but
the breaker will trip.

if you have 71% PF, you'll draw 14 amps from the socket, but only be
really using 10 of it to make sparks.

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