House wire in cars

I accidently used some house power wire to contruct my relay bank. I only used 5" on all the leads.

Will it be ok or will I need to replace it with auto wire?

Yea I figured that out. I order some cross linked automotive primary wire from waytekwire.

Too bad I could only get 250' rolls. Need some wire?

As far as I know auto wire is biult to handle more amps and more heat than house wire although I may be wrong.

House wire has some type of paper insulator that I believe could catch fire if exposed to high heat.

I wonder who started that stupid myth about not been able to use house wires on cars?

For amps it's fine as long it only goes from the battery to the amp or distribution block. The fact that is not as flexible is not an issue  since it won't be moving at all.  From the engine to the chassis or battery it will break because of the vibration. But from the battery to the rear of the vehicle the wire doesn't move at all. Unless you don't secure your amp, in which case you will be consider a DeeDeeDee.

As far as been able to handle the same amount of current as automotive wire it will handle the same as long they are the same gauge. And don't start the skin effect B.S. because skin effect is not an issue below 1MHz.