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What size circuit breaker?

heminut

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I'm putting a relay box in my Cuda to run my headlights and possibly a set of fog lamps off of. I'm looking at 3 relays total, one each for high and low beams, and one for the fog lamps. Anybody have a suggestion what size amperage circuit breaker I should use for the hot wire feeding the relays?
 

Steve340

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30 amp could be Ok but you may need a 40 if you plan to have them all on together.
 

Challenger RTA

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That would depend on what gauge feed wire? 8 gauge? Does this help?
The current I in amps (A) is equal to the power P in watts (W), divided by the voltage V in volts (V): To give you an idea total watts of load 400 w (lights).
I (33.333333333 A)= p (400 W) /V (12 V)
I(A) = P(W) / V(V) You might want to use a wire rated for 40 amps and fuse 35 amps. Run the numbers.
 
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heminut

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That would depend on what gauge feed wire? 8 gauge? Does this help?
The current I in amps (A) is equal to the power P in watts (W), divided by the voltage V in volts (V): To give you an idea total watts of load 400 w (lights).
I (33.333333333 A)= p (400 W) /V (12 V)
I(A) = P(W) / V(V) You might want to use a wire rated for 40 amps and fuse 35 amps. Run the numbers.
I have no intentions of even trying to figure out what this is you posted! Thanks!
 
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