Electronics > Beginners

Element14 do not sell red wire in 1 metre lengths (seriously)

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299792458:
I don't actually need 1 metre lengths, I'd get 10m rolls if I could, but it's 100m rolls or nothing!  At ~$50 each it adds up, especially if I want to get different colours and wire gauges.  If what Ian.M says is correct about them getting out of the cut wire business, I should get lengths of some of the other colours now while I still can.

If I can only have one wire gauge (other than 24awg breadboard wire), would 1mm2 or 1.5mm2 be more suitable (Goldilocks problem)?  It's mostly for stuff 5 - 10A, which I know 1mm2 can handle, but I like to minimise voltage drop.

Berni:
For when you need thicker wires you can often find some mains cable laying around. Found both in solid core or stranded variation depending on what you need.

In the form of long continuous lengths of wire i have a set of reels that mostly falls into thin and thick categories. Have a few colors of really thin stuff, basically wirewrapping wire and similar tiny wire, this is useful for doing bodges on PCBs or carrying signals around short distances without being bulky. For when i need more power i have bunch of 20 AVG silicone wire spools in various colors (Probably well over 100m of it in total and cost less than 50 bucks). For when that's not enough i have a bunch 2 conductor 2.5mm2 speaker wire(Some of this was used to make high current crocodile cables for PSUs). The next step up from that is 50mm2 cables with lugs on the ends for really high currents.

mariush:
Something else you could do would be to just buy one color wire in large quantity (black or white or transparent) and then buy some heatshrink tube of various colors.
When needed, just cut some small rings of heatshrink and apply them at the ends of your wires.... heat the heatshrink and it will compress around the wire. It won't come off...
 
You can cut a lot of tiny rings from a 25 cents piece of 1.2m of heatshrink tube.

Zero999:

--- Quote from: 299792458 on June 14, 2019, 02:19:57 am ---I don't actually need 1 metre lengths, I'd get 10m rolls if I could, but it's 100m rolls or nothing!  At ~$50 each it adds up, especially if I want to get different colours and wire gauges.  If what Ian.M says is correct about them getting out of the cut wire business, I should get lengths of some of the other colours now while I still can.

If I can only have one wire gauge (other than 24awg breadboard wire), would 1mm2 or 1.5mm2 be more suitable (Goldilocks problem)?  It's mostly for stuff 5 - 10A, which I know 1mm2 can handle, but I like to minimise voltage drop.

--- End quote ---
That sounds a bit pricey. My local supplier sells 100m rolls of 1mm2 for £21.06 or about 38 AUD each.
https://www.rapidonline.com/rapid-32-0-2mm-equipment-wire-1500v-6a-62325

EDIT: I've found some cheaper.
£15.43 per reel, which is just 27.82 AUD.
https://www.edwardes.co.uk/categories/1-0mm-tri-rated-cable

Just stick to one or two colours for power, say red and black or perhaps blue and brown, if it might be used for mains.

Stock a greater range of colours for signal and low power applications.

mariush:
TME.eu has  AWG 20 cable  at 0.28$ per m in 100m spool.... ex: https://www.tme.eu/en/details/ul-csa-har-20bk/single-core-cable-strand/lapp-kabel/4180501/

30m AWG 22 spools are at 0.29$ a meter : https://www.tme.eu/en/details/9921.002100/single-core-cable-strand/belden/9921-002100/

... and lots of other sizes.

Solid core wires start from 15$ for a 30m spool : link

300m spools are 85$ ... that works out to 8$ a spool of 30 meters.

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