@ScientistSmithYT Sounds like more of a question for Best Buy

USB oscilloscope 1.3kV amazon.com/dp/B074K4XPW3/ref=sspa_dk_detail_4?psc=1

hey there @NickAlexeev

@Shalvenay hey there, Eel

@NickAlexeev so, I've been scratching my head over a DIY.SE question lately, actually -- in a nutshell, "under the NEC, what wiring methods are suitable for running through a pond?"

@NickAlexeev I had a few name-brand differential probes like that, and they caused me more headaches than they were worth. Looks like those are just using USB for DC power, but the humor is not lost.

@Shalvenay The first thing that comes to mind is the GFCI. (Aka RCD, depending which side of the pond you're at. Pun intended) .

@NickAlexeev yeah -- problem is, a typical GFCI is going to have issues with 1500+' of wire on the load side

as that represents >2mA of leakage current then and there

@W5VO Yes. I’m guessing that most if not all of you have experience with a good product as far as amplifiers go. And especially more than me. So I thought what is a better place to ask than to ask here.

@Shalvenay I actually have a friend that is studying the newest NEC book. I’ll ask him about the under water wiring.

@ScientistSmithYT ah, interesting. I think I figured it out on my own (either multiplex submersible pump cable in LFNC-B, or TC-ER-JP or direct bury MC cable), but I'd love to get a better idea of if laying rigid conduit across a pond is practical or not!

@Shalvenay a working GFCI that is tested monthly will only shut off at 5 mA or greater. If it is shorted to ground only. AFCI Outlets And breakers are for short circuit interrupting. Not ground.

@Shalvenay laying conduit that is metallic is not recommended. Because if something goes wrong such as a short you can be the path to ground. But if it’s plastic then it is ok to use. As long as it isn’t submersed in water.

@ScientistSmithYT that's the thing -- the idea is "DIY submarine cable/conduit"

@Shalvenay Ah. So we are talking about cables in a submarine?

@ScientistSmithYT :P no, cables laid on the bed of a body of water

@Shalvenay this is where I wished pictures could be sent through this page. Does the DIY provide a picture?

@ScientistSmithYT no

@Shalvenay I get now why it’s hard to answer the question then. I’m not sure I quite get it. Can you describe the set up?

@ScientistSmithYT got to get a cable from one side of a pond to the other -- can't go around, can't go overhead

@Shalvenay how high is the voltage ?

@ScientistSmithYT 240VAC

@Shalvenay wha is the amperage?

*what

@ScientistSmithYT maybe 20-30A max?

@Shalvenay so you will need according to the given ampacity and standard copper wire: 12 AWG to 10 AWG wire

@Shalvenay I want to make sure though. Is the Wiring expected made out of copper?

@ScientistSmithYT for the run across the pond? yes.

@Shalvenay sorry, let me make it a little more clear. Yes, is the wiring going across the pond copper?

@ScientistSmithYT yup

@Shalvenay so then yes, the wire gauges I said are correct. Now if it was aluminum the gauge would be different.

@Shalvenay what does the wiring go to once it is across the pond?

@ScientistSmithYT it's a feeder to a couple of places

a barn and a gate, both low loads but still quite a ways away

@Shalvenay oh, are you wanting to put the wiring under or through the pond?

@ScientistSmithYT under the pond is likely impractical as it'd require draining the pond unless you could sort of dredge-plow direct bury cable in

@Shalvenay then I should add that metallic conduit and plastic conduit are both an option. But plastic conduit is recommended.

@Shalvenay how far are the two places away from your breaker box?

@Shalvenay I would say that plastic conduit is your best bet. For safety.

@Shalvenay I should also say that in your area you may have to call in an electrical inspector and go to your local government building and give them plans on where your electrical wiring is being placed. For example in Utah that is a requirement. Especially for any underground wiring.