HV wire
I need to extend the leads between a tiny 300mA inverter board and a small CCFL (these are flatbed scanner components). The wire markings identify it as AWM 3239 3kV-DC 150°C VW-1 with silicone rubber insulation. It doesn't specify the wire gauge but it looks to be around 24AWG. Anyway, I don't want to buy special high-voltage wire for this. Can I substitute?
-
-
Re: HV wire
I don’t know the answer about substituting wire,But ccflwarehouse dose sell small quantities of the HV and return wire.Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!
-
Re: HV wire
Thanks but it's not worth the shipping charge to me.
What distinguishes high voltage wire? Is it better insulation? If so, I can just add heat shrink tubing to ordinary wire.Comment
-
Re: HV wire
HV wire insulation is usually made of thick molded silicone.Elements of the past and the future combining to make something not quite as good as either.Comment
-
Re: HV wire
The supply side (typically pink) is rated for 3kV and is 24 AWG.
The return is rated for 300Vand is 28AWG.
This info comes straight from ccflwarehouse.com website.Stupidity should be a crime, especially for drivers. I have NO patience for them.Comment
-
Re: HV wire
The colours of this one are grey and white.Comment
-
Re: HV wire
White is the return wire.
The supply wire can be any color other than white. I've seen blue, black, gray, and pink.
I'm an electrician by trade and to quote my boss: "Electricity doesn't care what color wire it's in."Stupidity should be a crime, especially for drivers. I have NO patience for them.Comment
-
Re: HV wire
Current in the wire is in range of 20mAComment
-
Re: HV wire
Why is the thickness of the wires different. Isn't current the same for the whole circuit?Comment
-
Re: HV wire
More insulation on one wire.Comment
-
Re: HV wire
But wire gauge is the thickness of the conductor. I thought that insulation had its own rating system.Comment
-
Re: HV wire
No idea then.
Ground wire can possibly return all the fault current from other lamps as well or could be made to sustain more mechanical damage than the hot wire.Comment
-
Re: HV wire
Only that the ground wire is the thinner one in this case.
It's simply a case of insulation thickness - maybe someone was wrong when he said the HV wire is thicker gauge.
I'm not going to splice one apart to find out, but i believe the wire gauge is the same only insulation is thicker on the HV line.A working TV? How boring!Originally posted by PeteS in CAComment
-
Re: HV wire
OK that makes sense now.Comment
-
Re: HV wire
Hi folks. Let me show you what NOT to do with high-voltage circuits. (see attached snapshots).
The white connector that you see attached to the outside of the black box goes to the CCFL (don't know exact voltage). It used to be soldered to the inverter board. I moved it to the outside of the box, and connected it to the board using some thick leads I chopped off some components. Then I surrounded the leads with hot glue.
In the 'after' pic you can see a black trail where electricity has arced through the hot glue. A separation of approximately 5mm. Evidently, hot glue is not a good insulator, and possibly, even worse than air. I'm pretty sure there is an air gap of roughly the same separation between the traces on the back of the board.
What do you guys think? Remove the glue and use as-is? Use something else as an insulator? Is the inverter fried and unusable now?Attached FilesComment
-
-
Re: HV wire
Scrape the carbonised PCB off and don't use hot glue there.Comment
-
Re: HV wire
The hot glue had some additives or other impurities (dirt, moisture, etc.) in it that lowered its dielectric strength. In their pure form, almost all the plastics have greater dielectric strength than air at normal atmospheric pressure.Comment
-
We have an Lenovo Yoga 710 15ISK that we use as a secondary laptop. To cut a long story short, around May 2023, while traveling, I connected the laptop into an electrical outlet that was already switched on. Something made a "pfft" sound and the laptop refused to turn on after that. After getting back home, I gave the the laptop for repair to an informal repair person. He replaced the adapter and an internal motherboard part, but after he returned it I noticed that the LCD did not look normal. Essentially, every alternate horizontal line on the screen had gone missing. The laptop was... -
I currently have a customer's vintage fan on the work bench to repair.
It uses an induction motor with 4 poles. One of the poles is open.
I couldn't find the break so i cut off the original wire.
I have measured the other poles and the resistance is about 28 ohms per pole and I measured the diameter of the wire with my digital calipers and it is 0.35mm in diameter.
I need to work out how much 0.35mm diameter enamelled copper wire i need to order for it to be 28 ohms. I have used this calculator and it says i need 160.35 metres.
The enamelled copper... -
I was Ollie today which is a close out / surplus outlet store I do not go in there to often because you find things that you should not be tempted by but that is a another story
I saw a small space heater that used a wire type of heater element which I been looking for a while but not really hard mind you but when I saw this I grabbed it I going to go back tomorrow and buy the last one that is like the one I bought today because I need the heater element and the ceramic insulators and more of heat element wire because this one has two different wattage settings one 1300 watts ( tap... -
I got this recently as-is. Gigabyte 1070 video card.
DVI port is removed. I don't know why.
A wire is soldered across two spots where it looks like the DVI port was. I don't know why.
I've read of people simply ripping out DVI ports and the rest of the cards still working fine. Never read anything about soldering a wire in there for some reason.
The card seems to work fine, except it's stuck in low clock speeds. While starting a game or benchmarking, the clocks may momentarily increase to around where they should be, then goes way back down and stays... -
OK. I got the rocker switch figured out thanks to the good advice on this forum.
Now I need to figure out the correct wire to go to the switch from the broiler element and from the oven element.
This is a Whirlpool RDE3340 electric range.
The common wire on the switch appears to have a high temperature insulating material. I am guessing that both the wire to the broiler and the wire to the oven elements also need relatively high temperature insulation. What do I need to look for? The broiler is rated at about 2400 watts.
Where may I find parts...
Comment