75mm is good for about 7.5 amps max. I generally like to have at least 100% extra rating so a 3 amp fuse max is what i would use. This should be plenty for 4 leds. If you have working leds but blow a 10A fuse i think your wiring needs checking and you will probably find your fuse is directly across the battery.
Do I need an inline fuse for LED lights?
These LED lights draw less amps than your standard incandescent lights. You should not need a circuit breaker of in line fuse. … However, you can install an inline fuse if you feel that you need one. The 12-Gauge Mini Fuse Holder, # SWC9545, will can wire inline on the power wire from that battery.
What size fuse do I need for LED light bar?
A 10 amp fuse will protect the circuit. The 16 gauge wire will handle 10 amps in the length of wire that you will be using. The switch is rated for 20 amps. So, the 10 amp fuse will protect the circuit from overload.
How do I know what amp fuse to use?
Formula to Calculate the Fuse Rating
V for voltage in volt); I for current in Amps. The fuse rating can be calculated by dividing the power used by the appliance by the voltage going into the appliance. I (Amps) = P (Watts) ÷ V (Voltage).
Do LED lights fuse?
LED string lights last a long time and will sometimes out last the fuse so checking to see if the LED light string fuse has failed can save your set of lights. It is quick and easy to change Christmas light fuses and get your holiday decorating back on track.
How many watts can a 5 amp fuse take?
|45 AMP||For circuits of more than 13kw (13000 w)|
|13 AMP||For appliances between 700 and 3000w (3kw)|
|5 AMP||For lighting circuits. The maximum permissible load of a lighting circuit is 1200w or 12* 100 watt lamps|
|3 AMP||For appliances up to 700 watts, such as table lamps and alarm clocks|
How do you size a 12v fuse?
- Find the continuous amperage of the device you are trying to power and multiply that number by 1.5, then round up to the nearest fuse size you can find.
- Cross check that fuse size with the maximum fuse size chart below and verify that your fuse size is below the maximum fuse size listed in the chart.
What size fuse do I need for a 2000 watt amp?
Add all the fuse values together and you have the max the amps can draw. So if for exapmle the 2000w amp has 2-80a fuses..and the 300w has a 30a fuse..
How many amps do LED light bars draw?
IE 120 watts divided by 12 volts = 10 amps. you can use this as a good reference for switching and if you need a relay.
Do LED light bars draw a lot of power?
A true 120W LED bar would be brighter than the brightest set of car high beams. … LEDs use about one-fifth the power for the same amount of light output. So for your light bar, it would consume one-fifth of the current, i.e. 0.2 amps from a 120 VAC source, or 2 amps from the car battery.
Can I put a 13amp fuse in a 3 amp?
For an appliance rated as 700W or less, a 3A fuse should be fitted. For appliances above 700W, a 13A fuse should be fitted. … BS1363 has standardised on just two preferred fuse ratings, 3A and 13A, however any fuse rating up to 13A can still be used.
Can I use a 5 amp fuse instead of a 3 amp?
No. The current rating of a fuse means the fuse will open when the rating is hit. … Fuses protect the equipment being used as well as the power side of the circuit. If you need to use something NOW and the fuse is a 3 Amp slow blow you could use a 5 Amp fast blow without much worry.
Why are half my LED Christmas lights out?
If one of your LED light strands isn’t working, it’s probably just because it has a bad bulb. If one bulb dies, it can cause the rest of the strand to stop working. The only way to fix the problem is to find the bad bulb. Sometimes only a section of the lights will go out, making your job pretty easy.
Why is my LED bulb not working?
In some cases, the fixture may fail to perform as expected due to a loosely fitted bulb. In that case, your best bet is to check and see if the bulb fits tightly into its socket. Sometimes, the bulbs may weaken on their own and in that case, all you need to do is screw in the bulb tighter.
Why are there two fuses in Christmas lights?
Typically, these strings of lights have two tiny fuses, one in each side of the AC line, located inside the AC plug. The fuses are intended to melt or “blow” before the copper wires in the string could melt or cause a fire from overload. … Most strings include one or two spare fuses, which can be replaced in the plug.