[WTB UK] HV Cable (40kv) - Page 1
Forum section: electronics / general

author: dexters_lab
author_rank: Unknown
timestamp: June 02, 2015, 11:14:04 am
content: i am after a short piece of HV cable, about two meters long and rated to 40kv should suffice for my needsit seems hard to find this in the uk to buy in small quantities

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 02, 2015, 11:30:08 am
content: http://www.ebay.co.uk/itm/10ft-HV-Tesla-Coil-CO2-Laser-Wire-40KV-High-Voltage-Cable-10KV-15KV-20KV-30KV-/261863861299?pt=LH_DefaultDomain_0&hash=item3cf84d6c33

author: HighVoltage
author_rank: Super Contributor
timestamp: June 02, 2015, 11:34:16 am
content: In the UK, you can get high quality high voltage cable, made by Madison WireThis is automotive spark plug wire cable with Silicone / Silicone and woven fiber in between the two layers of silicone.Actually this wire is so good, it holds up t 68 kVIf you can not find it, let me know your address and I send you some

author: dexters_lab
author_rank: Unknown
timestamp: June 02, 2015, 11:45:50 am
content: Quote from: mikeselectricstuff on June 02, 2015, 11:30:08 amthanks mike, i saw that listing when i was looking/googling, looks nice cable but $24 for shipping two metersthe cheapskate in me is complainingQuote from: HighVoltage on June 02, 2015, 11:34:16 amthey are actually not that far from me, maybe i could get them to send me a 2 meter 'sample', thanks for the offer of the cable... i will message you if i cant source some

author: Andy Watson
author_rank: Super Contributor
timestamp: June 02, 2015, 11:53:44 am
content: Would the ordinary car ignition cable suffice? It's good up to 30-35kV.

author: HighVoltage
author_rank: Super Contributor
timestamp: June 02, 2015, 12:12:20 pm
content: Quote from: dexters_lab on June 02, 2015, 11:45:50 amThe cable you you want is their high quality version7 mm Black Sil/Sil/Braid 18 ga Copper Conductor, High DielectricYes, just let me know if they will not supply a sample, no problem for me, sending you 2 m in a mail envelope.

author: dexters_lab
author_rank: Unknown
timestamp: June 02, 2015, 12:20:17 pm
content: thanks for the help guys, ignition cable is fine... in fact there is plenty of options on ebay if you search for ignition cable instead of high voltage cablejust ordered 3 meters for £10

author: mikerj
author_rank: Super Contributor
timestamp: June 02, 2015, 04:10:37 pm
content: Quote from: dexters_lab on June 02, 2015, 12:20:17 pmYou were robbed!

author: dexters_lab
author_rank: Unknown
timestamp: June 02, 2015, 04:16:52 pm
content: that is the seller i bought from, but went for the slightly more expensive silicone stuff rather than pvc

author: mikerj
author_rank: Super Contributor
timestamp: June 02, 2015, 07:25:55 pm
content: Quote from: dexters_lab on June 02, 2015, 04:16:52 pmI just looked through his shop, and wasn't aware there were so many variants of HT cable

author: artag
author_rank: Super Contributor
timestamp: June 03, 2015, 02:40:06 pm
content: I've seen conventional PVC-insulated cable pushed through clear PVC tubing before. I'm sure the proper stuff is better, but can anyone comment on what that extra 2mm of PVC would do for the insulation ?

author: Isad
author_rank: Frequent Contributor
timestamp: June 03, 2015, 03:15:20 pm
content: Quote from: artag on June 03, 2015, 02:40:06 pmGoogle is bae.2mm of PVC i bealive give you about 2kv of insulation.

author: SeanB
author_rank: Super Contributor
timestamp: June 03, 2015, 04:23:58 pm
content: Extra protection, I did the same to lead electric fence cabling to a gate so the lead would not arc over with time. So far after 4 years ( and 2 electric fence energisers which died, funny enough both had failed HT transformers) the connection has not failed.

author: dexters_lab
author_rank: Unknown
timestamp: June 04, 2015, 01:15:06 pm
content: funny enough the cable i am replacing was originally is off a small neon sign transformer... it had just some boggo standard 300v rated cable but fed through some pvc tubing with the ground connection to a braided screen over the length of it... completely safe but looked a bit (as dave would say) how-ya-doin

author: HighVoltage
author_rank: Super Contributor
timestamp: June 04, 2015, 01:32:22 pm
content: Many products like to save on the money for proper HV insulation on wires. No wonder, because a really good silicone / silicone wire is around Euro 0.80 in high volume per meter. And a similar PVC cable is less than 1/10 of that price at high volume. That why we see it all the time with extra tubing for insulation. Interestingly the highest grade silicone material for insulation is coming from the USA. And even the best German silicone cable manufactures buy the raw silicone material from the USA.

author: Monkeh
author_rank: Super Contributor
timestamp: June 04, 2015, 02:02:06 pm
content: The extra tube is likely to provide a second layer of insulation, not to actually improve the insulation..Intact PVC has a breakdown voltage of something like 40kV/mm.

author: dexters_lab
author_rank: Unknown
timestamp: June 04, 2015, 02:09:24 pm
content: Quote from: Monkeh on June 04, 2015, 02:02:06 pmin my case yes, it was only 5000v but with the ground completely covering this ordinary pvc wire i guess it would turn the whole thing into an ozone generator without the second layer?

author: Monkeh
author_rank: Super Contributor
timestamp: June 04, 2015, 02:15:37 pm
content: Yeah, I wouldn't run 5kV with normal single-layer PVC. Corona is a problem even if the insulation doesn't break down.Heatshrink and PVC tube doesn't solve that.