I built a MH 400w ballast (really just put parts together) with a GE ballast and cap. I would like to fuse it to protect against shorting or fire.....where in the line should I put the fuse and what value should I use?

Thanks in advance.
doco Reviewed by doco on . Home Made Ballast I built a MH 400w ballast (really just put parts together) with a GE ballast and cap. I would like to fuse it to protect against shorting or fire.....where in the line should I put the fuse and what value should I use? Thanks in advance. Rating: 5