Naledge503
Head Administrator
Global user
Registered: 03-2007
Location: Por-Town City, Oregon
Posts: 366
Karma: 45 (+46/-1)
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General info
OHM'S LAW
BASE FORMULAS
P=I*E
E=I*R
TO FIND VOLTAGE
E=P/I
E=I*R
E=SQR(P*R)
TO FIND CURRENT
I=P/E
I=E/R
I=SQR(P/R)
TO FIND POWER
P=I*E
P=E2/R
P=I2*R
TO FIND RESISTANCE
R=E2/P
R=E/I
R=P/I2
P = Power in Watts
E = Electromotive Force in Volts
I = Electrical Current in Amps
R = Electrical Resistance in Ohms
SQR = Square Root
%of amp rating....Opening time
110%..................4 hours minimum
135%..................1 hour maximum
200%..................5 minutes maximum
Wire Gauge Recommended
Wire Gauge ............Maximum Fuse Size
00 awg...................400 amps
0 awg.....................325 amps
1 awg.....................250 amps
2 awg.....................200 amps
4 awg.....................125 amps
6 awg.....................80 amps
8 awg.....................50 amps
10 awg.....................30 amps
12 awg.....................20 amps
14 awg.....................15 amps
16 awg.....................7.5 amps
Quick Reference: This table shows the amount of current flow which will cause a 1/2 volt drop in a 15 foot run of cable. Many people consider 1/2 volt to be the maximum acceptable voltage loss in a system's main power wire. The 'total amp power' is the total maximum unclipped RMS power output‡ of all of the amplifiers combined. It is based on 60% efficiency (for class AB amplifiers) and a battery voltage of 13.8 volts. For all of the calculators and tables on this page, unless otherwise noted, 'max power' is the RMS power output when the amplifier is on the threshold of clipping.
Wire (GA) …………….. Current Flow ………………… Max Total Amp Power
1/0 ………………… 330 amps …………….. 3414 watts
1 ………………… 262 amps …………….. 2710 watts
2 ………………… 208 amps …………….. 2151 watts
3 ………………… 165 amps …………….. 1707 watts
4 ………………… 131 amps …………….. 1355 watts
5 ………………… 104 amps …………….. 1075 watts
6 ………………… 082 amps …………….. 0853 watts
7 ………………… 065 amps …………….. 0677 watts
8 ………………… 052 amps …………….. 0537 watts
9 ………………… 041 amps …………….. 0427 watts
10 ………………… 033 amps …………….. 0339 watts
11 ………………… 026 amps …………….. 0269 watts
12 ………………… 021 amps …………….. 0213 watts
13 ………………… 016 amps …………….. 0169 watts
14 ………………… 013 amps …………….. 0134 watts
Solid Wire Dimensions and Resistance
A.W.G. ……………Ohms per foot…………… Circular Mils Diameter…………… Diameter(inches)
4/0 …………….. 0.00004961 …………….. 209322.28 …………….. 0.4575
3/0 …………….. 0.00006250 …………….. 166139.2 …………….. 0.4076
2/0 …………….. 0.00007875 …………….. 131864.77 …………….. 0.3631
1/0 …………….. 0.00009921 …………….. 104661.14 …………….. 0.3235
1 …………….. 0.00012485 …………….. 83069.6 …………….. 0.2882
2 …………….. 0.0001573 …………….. 65932.39 …………….. 0.2568
3 …………….. 0.00019818 …………….. 52330.57 …………….. 0.2288
4 …………….. 0.00024969 …………….. 41534.8 …………….. 0.2038
5 …………….. 0.0003146 …………….. 32966.19 …………….. 0.1816
6 …………….. 0.00039636 …………….. 26165.28 …………….. 0.1618
7 …………….. 0.00049939 …………….. 20767.4 …………….. 0.1441
8 …………….. 0.00062919 …………….. 16483.1 …………….. 0.1284
9 …………….. 0.00079273 …………….. 13082.64 …………….. 0.1144
10 …………….. 0.00099878 …………….. 10383.7 …………….. 0.1019
11 …………….. 0.00125838 …………….. 8241.55 …………….. 0.0908
12 …………….. 0.00158546 …………….. 6541.32 …………….. 0.0809
13 …………….. 0.00199755 …………….. 5191.85 …………….. 0.0721
14 …………….. 0.00251676 …………….. 4120.77 …………….. 0.0642
15 …………….. 0.00317092 …………….. 3270.66 …………….. 0.0572
16 …………….. 0.00399511 …………….. 2595.93 …………….. 0.051
Calculations in determining many current draw and electrical charging system. Just as long as engine, stereo, and alternator charging system meet or exceded system requirements; I believe you will be fine. Just common sense ever time you up grade or increase stereo system equipment you need to make sure electrical system is able to support.
Few other things to consider as well:
Number(s) if amps
Alternator(s) ratings
(amperage) Amps current draw at daily and peak levels
Battery(s)
car engine and accessory current (head lights, a/c, back window defroster, windshield wipers, and interior lights, etc.)
Power wire.
200 - 400 amp High Output Alternators are available. Just as long as there are self regualting, and (altough have an option for with/or without regualtion it is usually better to find them regulated) "this option is usually intended for veteran SPL competitor.
High Output (H.O.) Alternators
Powermaster
7501 Strawberry Plains Pike
Knoxville, TN 37924
Phone: 865-688-5953
Website: http://www.powermastermotorsports.com/index.html
Contact Name: Coy Hudnall ext. 250
MECHMAN
7076 Oak Hill Road
Hesperia, CA 92345-0730
Tel: (760) 956-7596
Orders: (Toll free call) (888) 632-4626
Website: http://www.mechman.com
Contact Name: Dennis Moore
Irragi alternators
121 Highland St.
LaVergne, TN 37086
Phone: 615-287-7991
Email: dominick@tds.net
Contact Name: Dominick Iraggi
H.O. Alternators
n/a
n/a
TOLL FREE: 1.866.446.8878
Website: http://www.h-o-alternators.com/index.htm
Ohio Generator
134 N. Chapel St
Louisville, Ohio 44641
Phone: 330-875-6677
Fax: 330-875-6688
E-mail Address: info@ohiogen.com
Website: http://www.ohiogen.com
Last edited by Naledge503, 8/30/2007, 10:49 am
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95' Acura Integra RS
H/U: Premier DEH-P480MP
Subs: 2 Fi Q 15's
Enclosure: Fisher Customs 5.1CuFt Sealed
Amps:A3000DB, kx100.2
Front: Boston Acoutics Coaxials, CDT DRT-25
Elec: 200A Iraggi Alt. Big 3
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3/15/2007, 2:47 pm
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