Re: Driving lamps, etc. -Reply

[Mike Edmonds <edmondsm@concentric.net>]

Here are the formulas you requested:


Power = P (expressed in Watts)

Voltage = V (expressed in Volts)

Amperes = A (expressed in Amps)

Resistance = R (expressed in Ohms)


P = VA

V = AR

A = R/V

R = V/A

>Okay, I can visualize getting a cheap ammeter and connecting it between
>a battery post and cable to find out how much various things load my
>charging system.  But you can't very well measure the draw of your
>coil's primary and secondary circuits (because the alternator never runs
>without that load.)  As a point of curiousity, does anyone know how much
>juice it takes just to create the sparks?
>
>Also, what the heck is the formula for watts, voltage and amperes again?
> I haven't used it since high school.
>
>Matt Kulka.
>'74 B - with driving lights all right - mounted right there in the
>fenders where God intended them to be.
>
>>>> DANMAS <DANMAS@aol.com> 01/04/98 03:46pm >>>
>In a message dated 98-01-04 09:13:23 EST, mgbob@juno.com writes:
>
>> How much additional lighting can be installed before the alternator or
>>  generator is unable to supply enough power?
>
>To find out precisely how much lighting you can add, total up the
>current draw
>of all devices that you anticipate using at the same time...
>