MSefi.com read only forum (Jan.15,2018)

What size jumper wire to use and can I use stranded or should i Keep to solid copper? Also should i put a fuse link between the jumper also on small jumps such as D2 a piece of solder lead is fine or use a paper clip?

I ask because i did now build the board and would like to fix it before i put it in the case and screw everything together.

Logic jumpers can be pretty small; as you suggest, clipped resistor or diode tails make good jumpers for short reaches. Longer jumpers should be wire; solid or stranded doesn't much matter since there isn't much flexing going on.

Power jumpers (IAC, direct spark control) should be 18-20 AWG, IMHO. YMMV

Also should i put a fuse link between the jumper

IMO, I would definitely not use fusible link anywhere in MS!

Ken

Sorry, missed that. Agree with Ken; just go with the onboard protections.

Porsche650 wrote:What size jumper wire to use and can I use stranded or should i Keep to solid copper? Also should i put a fuse link between the jumper also on small jumps such as D2 a piece of solder lead is fine or use a paper clip?

I ask because i did now build the board and would like to fix it before i put it in the case and screw everything together.

A paper clip is made of steel, will be difficult to solder, and also will have some resistance which you don't want. A bit of solder would be difficult to solder. You use copper wire - like say a resistor or diode etc lead offcut. If you haven't saved any of those, you should be able to buy some in an electronics store. Or get some solid core hook up wire which will do both jobs.

used a solid core from household electrical wire for short jumper and put some wrapping on it. The used 20 gauge copper stranded wire for long jumpers.

household electrical wire for short jumper

That ought'a do it! Just curious..... what gauge?

Ken

I dunno US electrics - but are re-wireable fuses still in use anywhere? If so, 15 amp fuse wire is about the same size as the leads on resistors, etc. And may be rather cheaper than connecting wire bought from an electronics store. Or rather is in the UK. I have 250 gm reels of the various sizes bought from an electrical supplier.

trakkies wrote:I dunno US electrics - but are re-wireable fuses still in use anywhere? If so, 15 amp fuse wire is about the same size as the leads on resistors, etc. And may be rather cheaper than connecting wire bought from an electronics store. Or rather is in the UK. I have 250 gm reels of the various sizes bought from an electrical supplier.

Dave,

I am vaguely familiar with the fuse wire you mentioned, but it has been a very long time since I have seen any of it. I have no idea if it is still available!

Ken

Re-wireable fuses were still being fitted in the '70s, so there will still be plenty in use. I saw a card of 15,15 and 30 amp fusewire in a pound shop recently - which made me suggest it, as electronics stores are getting rare here.