US Amps AX User Manual download pdf (Page 4)

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.

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US Amps AX User Manual Page 4

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