Where to find isolated banana binding posts? - Page 1
Forum section: electronics / projects

author: ddavidebor
author_rank: Super Contributor
timestamp: June 03, 2023, 03:09:08 pm
content: Hi,Does anyone know any supplier for isolated banana binding posts that not only accept a shrouded banana plug, but can also accept a bare wire ?Example:https://www.aimtti.com/safety-terminals

author: Georgy.Moshkin
author_rank: Frequent Contributor
timestamp: June 03, 2023, 04:07:04 pm
content: I've found some "60270 pure copper terminal", but not sure if it have same feature of connecting bare wires.

author: Faranight
author_rank: Unknown
timestamp: June 03, 2023, 07:22:27 pm
content: I'd be interested in this as well. I know that Itech uses such binding posts for theirDC loads, but I have no idea where they source the connectors from.I have some connectors that look exactly like the ones that Georgy.Moshkin posted. Not only they cannot accept shrouded 4mm banana plugs, they do not seem to even have an orthogonal hole in the thread for accepting wires.

author: tooki
author_rank: Super Contributor
timestamp: June 03, 2023, 08:10:32 pm
content: I found some a while ago. I’ll be lazy and just quote my earlier post about them:Quote from: tooki on March 06, 2021, 01:31:48 pm

author: darius_
author_rank: Newbie
timestamp: June 03, 2023, 08:12:50 pm
content: Multi Contact SPK4 is the only that I could find. Seems to be available through RS:https://docs.rs-online.com/2631/0900766b8150871f.pdf

author: tooki
author_rank: Super Contributor
timestamp: June 03, 2023, 08:13:44 pm
content: Quote from: Georgy.Moshkin on June 03, 2023, 04:07:04 pmThose don’t accept shrouded banana plugs. Did you even bother reading the post?

author: Georgy.Moshkin
author_rank: Frequent Contributor
timestamp: June 04, 2023, 01:25:16 am
content: I was wrong. Can't find any, but some generic models are very close. Notice the gap on below drawings. But it seems smaller than needed, and look not as robust as connectors from the first message.EDIT: please check red marking on the drawing, I can't see this plastic part on the photo, there is some gap obviously.

author: Faranight
author_rank: Unknown
timestamp: June 04, 2023, 06:44:16 am
content: Georgy.Moshkin, neither of those terminals on the pictures you posted can accept a proper shrouded banana plug. I have them myself.Yes, there is some gap in there, but no, there just isn't enough space for the shrouded banana plug to fit in there - the hole is too small.

author: floobydust
author_rank: Super Contributor
timestamp: June 04, 2023, 07:12:05 am
content: Cal Test Electronics has someCT4231I find their quality good and prices high.

author: ddavidebor
author_rank: Super Contributor
timestamp: June 07, 2023, 10:58:30 am
content: Thank you guys !The cal test look good! a bit pricey and only 3 colour available, but seems like a good optionStaubli are listed by farnell as not longer manufacturedhttps://uk.farnell.com/staubli/23-0410-22/connector-panel-mount-red/dp/1116217

author: tooki
author_rank: Super Contributor
timestamp: July 22, 2023, 10:29:58 pm
content: Quote from: ddavidebor on June 07, 2023, 10:58:30 amThe E-Z Hook ones I linked to above are cheaper. But only come in red and black.

author: Georgy.Moshkin
author_rank: Frequent Contributor
timestamp: July 25, 2023, 03:00:59 pm
content: I looked into it some more and found only overpriced old stock of something very similar to farnell. But... hole for direct connection of solid (?) wire connector doesn't look right. How bare wire is supposed to stay in that hole? Even if it's made similar to wall power socket, there is only single wire "pin". It feels that it either jump out or melt because of heat-up at poor contact point. Everything I've seen for such wire connectors had some mechanism to keep wire in place.

author: tooki
author_rank: Super Contributor
timestamp: July 25, 2023, 03:10:17 pm
content: Quote from: Georgy.Moshkin on July 25, 2023, 03:00:59 pmIf by the Farnell one, you mean the Stäubli SPK4 series: what on earth are you talking about? Like any binding post, bare wire (solid or stranded) goes in theside. In the SPK4, I think it's spring-loaded, rather than screw-down.Anyhow, I am puzzled why you keep participating in this thread (which is the search for a very specific type of binding post, which several of us have provided competent responses to) when you not only don't understand the specific thing the OP is looking for, but apparently don't even understand the basics of binding posts?!?

author: Georgy.Moshkin
author_rank: Frequent Contributor
timestamp: July 26, 2023, 12:58:24 pm
content: I understand how it works, and installed plenty of similar non-isolated connectors, prepared gcode files and machined plastic enclosures by myself. I am interested in good looking high quality connectors for commercial projects. I am sorry that I somehow offended you. English is not my native language.What I am trying to say is that it is strange to make safe isolated connector, and then put a "backdoor" on the side to insert bare wire. It may be more universal, but spring loading/etc. does not protect from non-isolated bare wire coming out accidentally. It is more logical to use some kind of plug which can be installed on wire with screws/etc, similar to DIY power cord plugs.

author: alm
author_rank: Super Contributor
timestamp: July 26, 2023, 04:32:17 pm
content: Quote from: Georgy.Moshkin on July 26, 2023, 12:58:24 pmI see this as a trade off between safety and usability. Obviously from safety point of view bare wires or spade lugs are worse than sheathed banana plugs, so the best would be a flush safety banana socket as you find on multimeters. But from usability point of view it's nice to be able to use bare wire.I have some equipment with semi safety binding posts that screw down but have spring-loaded insulation that goes over the part that clamps the wire or spade lugs, and frankly they're a pain to use and require more touching the binding posts than normal binding posts.The way I see these binding posts as giving you a choice between safety banana plugs if needed and bare wire when using lower voltages. Just like how safety banana jacks can take both sheathed and unsheathed banana plugs depending on the needs.Quote from: Georgy.Moshkin on July 26, 2023, 12:58:24 pmThe important thing in DIY power plugs is strain relief, I'd say. But that would make the binding posts even more clumsy, and you might as well use safety banana jacks.

author: tooki
author_rank: Super Contributor
timestamp: July 26, 2023, 11:40:45 pm
content: Quote from: Georgy.Moshkin on July 26, 2023, 12:58:24 pmI think the point of these combined safety banana binding posts isn’t so much to be safety banana jacks with a secondary feature of accepting wire, but to be primarily a binding post, but with the secondary feature of allowing safety banana plugs to connect.