Electrical Issues (Dont Know) - Page 2 - Toyota Nation Forum : Toyota Car and Truck Forums

oibone781 · 10-14-2004, 08:30 PM

it seemed to be working pretty well, i finally was able to get my system to around 60-70% of its potential untill my ground wire came out...

eddiem67 · 10-15-2004, 11:54 AM

you need a relay, or your batteries will drain each other, stinger makes one.

eddiem67 · 10-15-2004, 11:55 AM

Also make sure you fuse the extra battery, coming in and going out, unless you want to melt your car

Hatch · 10-15-2004, 12:25 PM

btw- 0awg is overkill, im running 4awg @ 2700watts combined peak amperage of aprox 220, with a 1 farad cap and a 170amp alt, and a budget battery. I have never had any problems with electricity delivery or lights dimming, or audio clipping.

eddiem67 · 10-15-2004, 02:57 PM

4 awg is only good up to 130amps

Wire Gauge Current Flow Max Total Amp Power
Class AB (60% eff) Max Total Amp Power
Class D (75% eff)
0 awg 330 amps 2731 watts 3414 watts
1 awg 262 amps 2168 watts 2710 watts
2 awg 208 amps 1720 watts 2151 watts
3 awg 165 amps 1365 watts 1707 watts
4 awg 131 amps 1084 watts 1355 watts
5 awg 104 amps 860 watts 1075 watts
6 awg 82 amps 683 watts 853 watts
7 awg 65 amps 542 watts 677 watts
8 awg 52 amps 430 watts 537 watts
9 awg 41 amps 341 watts 427 watts
10 awg 33 amps 271 watts 339 watts
11 awg 26 amps 215 watts 269 watts
12 awg 21 amps 171 watts 213 watts
13 awg 16 amps 135 watts 169 watts
14 awg 13 amps 107 watts 134 watts

oibone781 · 10-16-2004, 07:57 AM

so you mean run a fuse from bat to bat and run a fuse from bat to amp?

oibone781 · 10-16-2004, 08:14 AM

how many amps should the relay be?

oibone781 · 10-16-2004, 01:19 PM

alright i am trying to narrow this problem down. With a stock electrical system with the big3 done, alt to bat (150anl fuse) and both battery ground wires, about how long should it take for my battery at 14.3volts to run down to around to 12.5, because this is happening in just under 15 secs, is this normal i am finally suspecting my amp....

***Tercel GTS*** · 10-16-2004, 08:55 PM

How many amps does your amp claim to require? What is the recommended fuse size? This makes a big diff in answering that last question. Also what brand is it?

oibone781 · 10-17-2004, 08:18 AM

it's a rockford 1500bd, it doesn't have any external fuses