There are 1,000 miliamps in 1 amp. As the NEC limits you to loading a lighting circuit to no more than 80% you can have 16 amps or 16,000 miliamps on that circuit. That would mean you can have 2,000 lamps of 8 miliamps each.
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You can put 2500 8 milliamp lamps on a 20 Amp circuit because 20 Amps is equivalent to 20,000 milliamps. To find the number of lamps, you divide 20,000 by 8.
There are 1000 microamps in one milliamp. Each derived SI unit in each direction is three decimal places as in all engineering form.
1,000 milliamps = 1 amp 200 milliamps = 0.2 amp
No, a milliamp (mA) is equal to 0.001 amperes. So 1 milliamp is equal to 1000th of an ampere.
Divide the total circuit wattage (15 amps x 120 volts = 1800 watts) by the individual lamp wattage (100 watts). This gives you 18 lamps that can be used on the circuit. However, it's recommended to leave some capacity for safety, so a practical limit might be around 15 lamps to be safe.
Eight on a 15 amp circuit, tweleve on a 20 amp circuit, including the gfci receptacle itself.