twenty amps needed from ignition

Hi
I have a 96 XJ6 that is aided with Hydrogen.
The power is coming from the fuse box under the hood (right side) with
switches
and in-line fuses and is working fine.
My question is how do i get the 20 Amps needed under the hood from the
ignition? \

"skahnkey" <dhahnke.DeleteThis@gmail.com> wrote in message
news:1191433744.311685.272750@50g2000hsm.googlegroups.com...
> Hi
> I have a 96 XJ6 that is aided with Hydrogen.
> The power is coming from the fuse box under the hood (right side) with
> switches
> and in-line fuses and is working fine.
> My question is how do i get the 20 Amps needed under the hood from the
> ignition? \
>
Use a relay controlled by the ignition and powered from the battery or fuse
box.

Don Young