a 15 amp . 120V . Circuit provided by a 14/2 conductor that is rated at 80 % , load , will permit me 12 amp . Before I over load the circuirt . So , my question is based upon an imagine scenario. I have , 20, 65 W. Bulbs because that my bright circuit (obviously this is a dedicated circuit ) ,which will certainly requiere 1,300 watts to operate . Mine circuit is enabling me 1,400 watts total for distribution. Due to the fact that I have 1,300 watts demand this will certainly leave me with an additional 100 watts . But due to the fact that I want to know the resistance that of my bulb i go come R = E square / ns wich in return I obtain = 221.61 . By rounding the number I obtain = 222 ohms per fixture . Currently , I"m curious about the amps the each will certainly be consuming so i go come I= P/R and also my result is = 0.541 amps. Or by rounding it I obtain 0.5 amps. Per pear . If I use I= P/E ns =1,300 separated by E = 120 V. = 10.83 Amps if i multiply the 222 ohms X 20 fixtures I gain 4,400 complete . However I again to be curious about my present flow and ther fore i go to i = E square / R and find the an outcome is = 10.28 wich is not specifically the 10.83 that I acquired from my an initial attemp. Possibly you guys have some entry on the topic .Backin the 1996 us were not permitted to connect more than 10 recessed cans in one given circuit . But earlier then circuits where tighter to work with , not choose today the the rules have actually opened up yet if any of you know where i can find this alters I will certainly appreciate the or if any type of explanation feasible . give thanks to you . You are watching: How many recessed lights on one circuit Thisw is simple enough. The NEC requires that the best wattage permitted by the fixture and trim mix (which means a trim swap could reason issues) need to be used.In various other words, if these fixtures have the right to accept 75-watt bulbs, that"s the figure you need to use. 20 x 75 = 1500 watts. Since 12 x 120 = 1440 watts, friend would be over the limit. iwireModerator
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LocationMassachusetts

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First together these room recessed lamp the NEC needs you number the circuit making use of the rating the the fixture, not the rating that the lamp.20 - 150 watt rated fixtures with 65 watt lamps would certainly be 3000 watts, no 1,300 watts.Also a 15 amp circuit can administer 15 amps 1800 watts non-continuous. In mine opinion few dwelling unit circuits are constant loads.