Max watts/amps 4 gauge wire

[SS ted 10+ year member]

Anybody know whats the max wattage and amps i can run off 4 gauge wire? Its tsunami wire. I want to run a kenwood kac-818 400w max and a jl HD 750/1

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[dragon.breath 10+ year member]

Keep in mind that length is a factor here as well. If you're doing a long run (>20 feet), you should use one size larger. It doesn't hurt to use a wire size that's larger than necessary, but it will usually cost more and can be more difficult to install.

Power Wire:

10 gauge: ~35 amperes

Class D (~70% efficiency) -

Class A/B (~50% efficiency) -

8 gauge: ~55 amperes

Class D (~70% efficiency) -

Class A/B (~50% efficiency) -

6 gauge: ~87 amperes

Class D (~70% efficiency) -

Class A/B (~50% efficiency) -

4 gauge: ~140 amperes

Class D (~70% efficiency) -

Class A/B (~50% efficiency) -

2 gauge: ~220 amperes

Class D (~70% efficiency) -

Class A/B (~50% efficiency) -

1/0 gauge: ~350 amperes

Class D (~70% efficiency) -

Class A/B (~50% efficiency) -

2/0 gauge: ~440 amperes

Class D (~70% efficiency) -

Class A/B (~50% efficiency) -

4/0 gauge: ~700 amperes

Class D (~70% efficiency) -

Class A/B (~50% efficiency) -

Speaker Wire:

22 gauge: ~2.2 amperes

8 ohms -

6 ohms -

4 ohms -

3 ohms -

2 ohms -

1 ohm -

20 gauge: ~3.4 amperes

8 ohms -

6 ohms -

4 ohms -

3 ohms -

2 ohms -

1 ohm -

18 gauge: ~5.5 amperes

8 ohms -

6 ohms -

4 ohms -

3 ohms -

2 ohms -

1 ohm -

16 gauge: ~8.7 amperes

8 ohms -

6 ohms -

4 ohms -

3 ohms -

2 ohms -

1 ohm -

14 gauge: ~13.7 amperes

8 ohms -

6 ohms -

4 ohms -

3 ohms -

2 ohms -

1 ohm -

12 gauge: ~21.8 amperes

8 ohms -

6 ohms -

4 ohms -

3 ohms -

2 ohms -

1 ohm -

10 gauge: ~34.6 amperes

8 ohms -

6 ohms -

4 ohms -

3 ohms -

2 ohms -

1 ohm -

8 gauge: ~55 amperes

8 ohms -

6 ohms -

4 ohms -

3 ohms -

2 ohms -

1 ohm -

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

 

[audiobaun 5,000+ posts]

Anybody know whats the max wattage and amps i can run off 4 gauge wire? Its tsunami wire. I want to run a kenwood kac-818 400w max and a jl HD 750/1

Recommended Power and Ground Cable Sizes & Speaker Wire Size and Length

Here is a chart that should help you out,and can be bookmarked for future use

 

[SS ted 10+ year member]

Thanks alot that was really helpfull

 

[SS ted 10+ year member]

What about alternator and batterie should i be ok?

 

[garretttt4 10+ year member]

What about alternator and batterie should i be ok?

Do the big 3 upgrade and you should be good to go!

 

[J31Rob 5,000+ posts]

What he said.