US Amps AX - Manual (Page 4)

3
AWG 14
AWG 13
AWG 10
AWG 8
AWG 6
AWG 4
AWG 2
AWG 1
AWG 0
AWG 00
AWG 000
AWG 0000
30 Amps
35 Amps
45 Amps
60 Amps
80 Amps
105 Amps
135 Amps
160 Amps
190 Amps
215 Amps
245 Amps
275 Amps
GETTING WIRED:
Once you have established the current needs of your system, it will be of the UTMOST
IMPORTANCE to properly fuse the amplifier. Remember, power connections are always the last
thing. There cannot be enough emphasis placed on the importance of proper fusing. Fuses
prevent catastrophes. Always fuse each U.S.Amp product at or less than the recom-
mended amperage. Another major consideration is wire. If you wish to build a truly high-
powered system, you must take into account the total amperage requirements of the system
and select your wire gauge accordingly. The following chart can be used as a guide:
CARE AND FEEDING OF YOUR BATTERIES
As mentioned before, most batteries are built for the relatively light chore of starting the
engine. Unless you have the room and ambition to install an upgraded high-powered alternator,
your system current requirements may exceed the charging capability of your car’s electrical
system. When this happens, you have to rely on the vehicle battery(s) to make up the
difference. Another factor to consider is voltage. Although the electrical system is considered to
be “12 volt”, the battery, when healthy, actually “rests” at 12.6 volts. The average alternator
“puts out” 14.4 volts when the engine is on, because it is necessary to “feed” a battery higher
voltage in order for it to charge.
WIRE GAUGE and AMPERAGE Guide:
These are real numbers, right out of the 1951 U.S.Federal Electronics Code Book.
It takes real wire to do real work.
For each 100 watts, when playing music, count on 10 amps average of average current draw.