Evening all,

A quick wiring question please, what amp wire do i need to run from my battery to my ignition switch? Would 25 amps be ok (this wire would not have cranking amps running through it)

All the best

Alex

What tributary circuits do you have downstream? Add up the amps and you'll have your answer..

im running a 12v ign supply hub from the ignition switch, this will then feed the switches on the dash.

ECU,
Low Pressure Fuel Pump,
headlights & indicators,
fan,
horn,
rear lights etc
oh and digi dash

If you are powering them all directly then no it will not be enough.
If you are using them as a mixture of direct loads and/or for switching relays then perhaps it'd be enough.
You really need to work it all out on paper

P=V*I
V=I*R

etc.

You say feeds the switches, which of these are wired with relays?
As said this needs to be a bit scientific and is actually quite pivotal in the way your car wiring is designed