<div dir="ltr">Thanks Sean,<div>Indeed, underground service is one more reason to like Fort Collins. I'm thinking you're correct as far as surge protection being adequately supplied by the whole-house unit.</div><div>Thanks,</div><div>Phil</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Mon, Sep 15, 2025 at 10:36 AM Sean Reifschneider <<a href="mailto:jafo00@gmail.com">jafo00@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">If you have whole-house surge protection, I can't see why you would need another one. I am in Fort Collins and have underground power service, and really don't worry about surge protection, but depending on where you are it may be a bigger deal. Typical residential power is supplied on two 120v legs with a neutral, and you get 240 volts by using both of the 120v lines, because they are out of phase they provide 240v potential across the two (for 120v power you go either of the hot legs to neutral). This is why the breaker uses two panel slots (dual breaker), because it needs to protect two 120v hot legs.<div><br>If you have surge protection on both of those legs for your whole house, you're probably doing pretty good there.</div><div><br></div><div>That said, I have run 240v for machines at home in the past, and I didn't do any surge protection.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Sep 14, 2025 at 11:24 PM Phil Marsh <<a href="mailto:microcraftx@gmail.com" target="_blank">microcraftx@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi,<div>I'm now trying to run my servers in my rack from a newly-installed 240V circuit. Code required a GFCI 240 dual breaker since this is in my basement.<br>I have a whole-house battery backup so I don't need a UPS, just a surge protector. I do have a whole-house surge protector but not sure if this is enough?<br>I would like to get NEMA 6-20 or 6-15 outlet surge protectors. I tried these:</div><div><a href="https://www.amazon.com/dp/B07SS77B9Q?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1" target="_blank">https://www.amazon.com/dp/B07SS77B9Q?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1</a></div><div>but it appears that they were not tested by the manufacturer on GFCI 240V NEMA 6-20 circuits and therefore trip the GFCI protection randomly. Any imbalance between the two hot wires' currents will trip the GFCI protection and I suspect these surge suppressors are doing that because I don't see this problem when my equipment is plugged directly into the 6-20, 240V outlets.</div><div>Do you think the whole-house surge protector is good enough?</div><div>Does anyone here run 240V in their personal servers and if so, how did you handle this? thanks</div><div>Thanks,</div><div>Phil<br><br></div></div>
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