Jack C.

Help! I need to run two #4 wires through the firewall on our 2015 GMC Yukon to run a 1500 watt power inverter mounted under the front seat about 12' of wire. This will power a ventilator and oxygen concentrator for my wife on trips to the doctors offices, she has ALS. This has to be a first class installation, we can't have the power go down or a short. I have a Bussman 90 Amp circuit breaker that needs to be mounted in the engine compartment probably on the upper firewall. I plan on getting power from the spare lug on the fuse block on top of the battery. The first two feet of wire probably won't be fused or breaker protected as I didn't see any fuse sin this block? Is there any way to protect this wire in the block? Any help or guidance anyone can provide will be greatly appreciated. Thanks, Jack