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why we need fuse in our cabs?
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alundra:
can someone explain this  ???? thx
JCL:
This is a pretty unspecific question, so an unspecific answer is that fuses are a safety device that cuts current off if the powered device pulls too much current.

This could protect an electrical or electronic device from causing a fire if it malfunctions due to overheating or a short in the wiring. Many devices have fuses in them even though you don't know it. I suspect that computer power supplies do, monitors do, etc.

An arcade cabinet is a mess of power sucking devices and potentially a rats nest of wiring. Real arcade cabinets often have a fairly open monitor with line current pretty much exposed. ANd they go into environments where they could suffer a lot of abuse. So for a real arcade cabinet, some extra protection is needed.

For a homebuilt, it depends. If you just have a computer, computer monitor and low voltage wiring (controls) with good ventalation, it is unlikely that you need to be overly concerned. But it wouldn't be a bad extra safety feature. If you have line voltage exposed due to an arcade monitor, bezel lighting, etc, then a fuse becomes more important.

Tahnok:
Fuses are for safety and equipment protection. NEVER bypass fuses! They should open the circuit if it gets too much power going into it, like a shock or surge. Ideally, they should protect the equipment from burning up and possibly stop it from shocking you (though they are mainly there for the equipment).
AlanS17:
Even home-built machines have fuses. They just don't realize it becaused they're built into the surge protector / power strip.
TOK:
To prevent releasing Magic Smoke.  ;) wlcm!
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