Author Topic: 3x1.5mm rubber cable with tinned strands?  (Read 146 times)

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Offline Lomax

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3x1.5mm rubber cable with tinned strands?
« on: June 01, 2020, 01:48:28 pm »
I think I'm about to hurl my laptop across the room in disgust after spending hours trawling the Interwebs for something I'm sure used to be quite common, yet coming up with NOTHING. Please help me resist the urge to break something expensive, and tell me if you know: where can I buy three core outdoor mains cable with tinned conductors? A few years ago I bought it in 10m rolls at my local builder's supply megastore (B&Q of all places, IIRC) but it seems no-one even makes this stuff any more?  :-//
 

Offline themadhippy

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Re: 3x1.5mm rubber cable with tinned strands?
« Reply #1 on: June 01, 2020, 01:57:38 pm »
you might have to buy a bit more than 10 meters
https://www.elandcables.com/cables/h05gg-f-cable
 
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Online richard.cs

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Re: 3x1.5mm rubber cable with tinned strands?
« Reply #2 on: June 01, 2020, 02:01:22 pm »
If the cable is made with natural rubber (which I don't think is common any more) then the strands are tinned to protect them from the vulcanising process. Modern rubber cables tend to be butyl rubber or even silicone so it's no longer a necessary part of the cable manufacturing and therefore less common. Why are you after tinned? Corrosion resistance at the terminations? It may be better to solve the problem another way.

As themadhippy points out rubber flex with tinned conductors is still available, just somewhat specialist. Have you looked at places like RS, Farnell and CPC? You'll have more luck there than with B&Q who probably won't even know if it's tinned or not.
 
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Offline Lomax

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Re: 3x1.5mm rubber cable with tinned strands?
« Reply #3 on: June 01, 2020, 02:37:34 pm »
you might have to buy a bit more than 10 meters

I only need 20 meters, but could get 50 if I manage to find a source. But if I'm going to pay the kind of price someone like Eland would charge then there are better and cheaper options for my application.

If the cable is made with natural rubber (which I don't think is common any more) then the strands are tinned to protect them from the vulcanising process. Modern rubber cables tend to be butyl rubber or even silicone so it's no longer a necessary part of the cable manufacturing and therefore less common. Why are you after tinned? Corrosion resistance at the terminations? It may be better to solve the problem another way.

As themadhippy points out rubber flex with tinned conductors is still available, just somewhat specialist. Have you looked at places like RS, Farnell and CPC? You'll have more luck there than with B&Q who probably won't even know if it's tinned or not.

The reason I'm looking for it is because it is (was) a cheap way to get tinned multi core cable - probably the cheapest in fact. I think I paid £12 for the 10m rolls in B&Q. That was five years ago. Why do I want tinned strands? It's for a marine application, where tinned strands are considered good practice. Interesting about natural rubber and corrosion from vulkanisation, did not know this. Pretty sure the stuff I got was butyl rubber or possibly neoprene though. You know, the usual H07RN-F type cable. Common as anything. I used it to replace the cables on stage lighting fixtures which came with short, stiff and not very heat resistant PVC cables. Still look like new today, despite the rigours of the road. I'm sure I can find many good alternatives at one of the big electronics suppliers, but these will surely have a price which makes them uninteresting.

Edit: Added picture of Helukabel H07RN-F, listed as "product withdrawn from sale" on TME. None of the 113 H07RN-F cables in their current catalogue have tinned strands.
« Last Edit: June 01, 2020, 02:47:43 pm by Lomax »
 


Offline Lomax

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Re: 3x1.5mm rubber cable with tinned strands?
« Reply #5 on: June 01, 2020, 03:18:51 pm »
Would these be ok?

Ooh, nice. I do like Lapp Kabel. And those are shielded as well. Would never have thought to look at shielded cable for a 12V LED supply, but hey, why not? As it happens though, I just found something over at Rapid: Faber Kabel 050025 H05RR-F. £1.30/m + VAT with no quantity discounts, but at least I now know I wasn't dreaming; these things do still exist. Interesting they call it H05RR, and not "RN" as I thought it would be. Never quite managed to get my head around cable type designations.

Edit: Could it be that RN = neoprene and RR = X-linked polyolefin? Faber seem to say they are equivalent.
Quote
The Faber Kabel 050025 is a Rubber Insulated Cable H05RR/RN-F acc. to EN 50525-2-21.
...
The cable has a fine stranded tinned copper conductor, with a cross-linked polyolefin outer sheath.
« Last Edit: June 01, 2020, 03:36:44 pm by Lomax »
 

Offline themadhippy

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Re: 3x1.5mm rubber cable with tinned strands?
« Reply #6 on: June 01, 2020, 03:42:07 pm »
RR is a light duty cable "  Not for industrial/commercial or agricultural usage."
Quote
Never quite managed to get my head around cable type designations.
I keep this on speed dial
https://myelectrical.com/notes/entryid/228/harmonised-cable-codes-and-colours
 
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