[sdiy] next quesiton about power - what gauge wire to use?

Harry Bissell Jr harrybissell at prodigy.net
Fri Feb 24 16:44:22 CET 2006


For 1.5A any gauge larger than 22ga would be fine.  I'd use
  what was mechanically sound (22 may be small in that regard).
  Maybe 18ga is better.
  
  If you run 1300mA out of 1500mA... it will work fine but the supply
  might fail to start because of inrush current.  If that happens you
  can make a 'soft-start' circuit that turns on one cabinet at a time...
  or limits the current for some short period of time while all the
  capacitors charge
  
  H^) harry

Julian <julian at 22host24.com> wrote:              Thanks for the replies about the   xlrs...
   
  My next question - 
   
  Im planning on running two 6u cases of modules   off one power one (1.5amp) supply.  I suspect these probably average   at about 650ma per case, so 1300 total (although i can work this out more   exactly, if needed)  Is this sort of headroom acceptable?
   
  Each case has two rows of modules, and the two   busses inside will be bought to one plug per case (so two lines running back to   the psu)
   
  But then i get onto wire gauge, specifically earth   - 
   
  I know bigger is better, and all that, but roughly   what ampage of wire do you think i should use, both from the two busses to the   plugs (the busses are stripboard, with the earth lines re-enforced / paralelled   with 22swg tinned copper wire), and from the plugs back to the psu?
   
  Thanks once again, 
   
  Julian
   
  (ps. the busses dont have caps on them - ive been   advised previously to fit them, but ive just never gotten arround to it, as it   meens taking appart a lot of stuff, just to get to the busses at the   back):
   
   

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