Hi, friends welcome to the new post. In this post, we will have a look at How Many Lights on a 15 Amp Circuit. The number of lights that can run on a 15amp circuit is based on watts of light. The total amper used by light on a circuit does not exceed 80 percent of the circuit breaker rating. For a 15 amp circuit breaker, there will be 12 amps. For 60 watt light, we can put 24 lights on 15amp breaker. How Many Lights on a 15 Amp Circuit will be discussed in this post. Let’s get started.
How Much Can A 15Amp Circuit Handle?
The number of lights we can run on the circuit can be different through circuit breaker rating, thickness or gauge of wire used in the circuit, and enegy needed for lights.
The lighting circuit uses 14 gauge electrical wire, and light gauge wire as compared to electrical outlets. Circuits rated for 20 amp breakers use 12 to 10gauge copper, thick copper wire.
The high current flowing from the wire makes it overheated. The thin wire gets heated fast when a high current passes through it.
NEC says that the breaker load does not exceed 80 percent of the capacity
In simple words 15 amp circuit breaker did not exceed 12 mpas in the circuit. There are no limits on the number of lightfitting connected on 15 amps circuit. If all lights are working at the same time and the current crosses 12 amps it means the circuit not following the 80 percent rule.
Related: 125 Amp Wire Size and Breaker Guide
How Many Lights on a 15 Amp Circuit
 To find the watt of light that can connected to the circuit use this formula

watts = Volts x Amps
 Watt=(capacity of power available)
 Volts= (voltage of the lighting circuit)
 Amps= (capacity of the circuit breaker)
 For the USA electrical system in the case of a 15 amp circuit
 Total capacity = 120Vx15A = 1800 Watts
How Many LED Lights on a 15 Amp Circuit
 To find how many LEDs can connected in a 15 amp circuit, find the watts of the bulb and then use this expression.
Number of LED lights = Maximum circuit wattage / LED Watts rating
 The 60watt incandescent bulb or LED light is a rating of 8.2 watts.
1800W/8.2W = 219
 SO 120V 15 A circuit has features to handle 219 8.2W LED bulbs.
This formula can be applied to all light sources, including fluorescent, halogen, and incandescent whose wattages will be higher resulting in a reduced number of lights compared to LED.
Read also: What Size Wire Do I Need for a 60 Amp Sub Panel?
How Many 100Watt Bulbs Can Be On A 15 Amp Circuit?
As we know
Watts= V x I
 So supposing the US standard 10–120 VAC circuit, and considering that a 100watt bulb uses one ampere. So 15 amper circuits will handle 15 bulbs.
100W/120V = 0.83A, and 15/0.83 = 18 bulbs.
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How Do You Work Out Light Wattage to Amps?
Normally 2 methods are used to find amps of lighting bulbs. The first method is this formula
Amps=Wattage/Volts,
2nd is to use different online tools for converting light watts into amps. Just put values of watts and voltage rating and get a result.
3rd method is with the use of a multimeter to find the amps of the circuit where the bulb is connected. Multimeter used not only for ampere measuring but also resistance and voltage rating.
How many lights can go on a 15amp breaker?
How Many LED Lights on a 15 Amp Circuit Example
15 Amps x 0.8 = 12 Amps
To find the number of lights that can connected to 15 amp circuit, measure the continuous power capacity with the use of power formula.
P=VI
P = V x I
= 120 x 12
= 1440 Watts
If there is 10 wat used 120V LED light bulbs, you can connect 144
1440W / 10W = 144
How Many 75Watt Lights Can Be on a 15 Amp Circuit?
According to the P=VI formula.
 As the circuit is 120 volts for 75 watts 19 bulbs will be used.
How Many 100Watt Bulbs Can Be on a 15 Amp Circuit?
If the circuit is rated for 15 amps and the light needs a 120volt power supply, 14 units of 100watt bulb can be connected.
How many 100 watt bulbs can be on a 15 amp circuit?
How many light switches can be on a 15amp circuit?
How many light fixtures can be on a 15amp circuit in Canada?
How many amps is a ceiling fan?
Ceiling Fan (low to high setting)  0.26 Amps 
Oscillating Fan  0.51 Amps 
Furnace Fan  79 Amps 
Space Heater (1600 watts)  713 Amps 
How many amps does a LED light use?
How many can lights on a 20 amp circuit?
Can I wire outlets and lights on same circuit?
Can bathroom lights be on a 15 amp circuit?
Are lights 15 amp or 20 amp?
How many amps does a TV use?
How many amps does a refrigerator need?
How many amps does a washing machine use?
Types of Lightbulbs
 Incandescent Light Bulb
Earlier incandescent bulbs were commonly used since they produce warm light. Not they are less cost bulb and so it now used.
The normal rating of these bulbs is 40 to 100+ watts. It is not efficient in the form of energy to not commonly used
 Halogen Light Bulb
Halogen bulb is an updated type of incandescent light. The basic difference between this bulb and incandescent is the use of halogen gas. Its wattage is 90
 Fluorescent Light Bulb
Fluorescent lamps are used in offices, parking areas, and also at home. It is energy efficient, bright, and works longer than an incandescent bulb.
its wattage rating is 8 to 30 watts.
 LED Light Bulb
LED bulbs are mostly used at home, commercial, and in industries. It is used due to low power use and longer lifespan.
Its main drawback is that high cost than other bulb types. its high efficiency needed less amper, and use about 6 to 20 watts for glowing.
FAQs:
Q: What happens if we exceed a 15amp circuit’s capacity?
120 volts x 15 amps = 1,800 watts
So if we use more than 1800 watts on the circuit it will overload and the breaker will trip
Q: Can we upgrade a 15amp circuit to a higher capacity?
if there is a 15 amp break, replace it with a 20 amp breaker to increase the circuit capacity. But it is done properly before doing this get services if an expert.
Q: How much load can a 15 amp circuit handle?
Normally 15 amp breaker an run single 1K light without blowing or about 1800 to 2000 watts.
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