My nephew wants to install an ammeter from Sunpro in his Chevy Avero. I have been told that one shouldn't, because of the possibility of causing a fire due to heavy amperes. He now has installed oil pressure, oil temp, water temp, and voltmeter. I think that the voltmeter gives enough info. If he does install one, what size wire should you use? The alternator is rated at 85 amps. I would think that you must match the max alternator output to the wire size. What is the proper way to install the meter and where?