Automotive electricity 101 [Archive] - Chevelle Tech

: Automotive electricity 101


mjpell
Aug 9th, 99, 3:30 PM
Ok, back to the basics.
What does a voltage regulator really do?
Is it required?

Why is it that I can connect accessories directly to the battery thru a fuse and a switch, which is receiving 14-15volts, without any apparent damage/problems? Seems like 14v should be too much???

I've connected an aftermarket fuse panel source wire directly to the battery, which means the fuse panel is recieving 14 volts while the alternator is working. Any problems I should expect with this?

Also, How does one hook up an alternator gauge to monitor the voltage? Hook directly into the main alternator wire? to the battery?

Thanks,

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Gold #178
aka Tailspin on IRC Chat

tom3
Aug 9th, 99, 4:03 PM
Voltage is potential energy. Energy flows from the greatest potential to the least. Sort of like **** runs downhill, as plumbers say. Since a battery is normally at 12 volt potential, the alternator must charge above this, usually 14 volts. The regulator varies the field voltage fed to the alternator which controls the charging rate, or voltage output of it. You can hook up a voltage gauge to about any bigger sized wire in the system. Most accessories are built with a voltage regulator built in to protect it from surges, etc. tom

Mkrauser
Aug 10th, 99, 11:23 AM
One further suggestion. Use a fuseable link at the + battery connection for your aftermarket fuse panel. Without it you have a "feed" wire that is unprotected and therefore a potential fire hazard.

chevy70
Aug 14th, 99, 7:39 PM
most electical systems operate between 13 to 14.5 volts. be very carefull you may be capable of starting a bad fire.