Reference » Electrical Current
ELECTRICAL CURRENT
This guide will help you determine your electrical current requirements as you prepare to use your Smith-Victor lighting kit. You can calculate the amount of current your light unit will draw with this formula:

Power (watts)/Voltage (volts) = Current draw (amps)

For example, with a 1000 watt light unit: 1000 watts divided by 110 volts would equal a current draw of 9.09 amps. (Although power supplies can vary from 110 to 120 volts, assume the smaller 110 volt supply in your calculations to decrease the possibility of underestimating your needs and blowing a fuse.)

You would add the current draw of all of your light units together to determine your total current requirements.

If your circuits are protected by circuit breakers, rather than fuses, be aware that, over a period of time, a circuit breaker will carry only 80% of its rated load without tripping. For example, a 15 amp circuit breaker will carry a 12 amp load; a 20 amp breaker a 16 amp load. While they might carry a heavier load for a time, after a period of hours the larger load would cause the breaker to trip. To avoid the inconvenience of a "blackout", stay within this 80% limit when calculating your requirements.

Also, remember that different receptacles are not necessarily on different circuits. You need to know what circuit your various receptacles are on before you begin to use your lights.

Light Unit Wattage Power Draw
250 2.27 amps
420 3.82 amps
500 4.55 amps
600 5.45 amps
650 5.91 amps
750 6.82 amps
1000 9.09 amps
Kit Wattage Power Draw
1000 9.09 amps
1200 10.9 amps
1250 11.36 amps
1500 13.63 amps
1800 16.36 amps
1900 17.27 amps
2500 22.72 amps
3000 27.27 amps
4000 36.36 amps

 
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