LED light strips / USB Charger install on Ninja 250r — Couple of questions

[mars]

​Hi Forum,

I'm wiring some LED light strips on my ninja 250. My USB charger was previously wired directly to the licence plate light. It's a tad messy and I've decided to clean it up a bit since I'm installing the LED light strips anyways. Here's my thought from what've I've google so far:


Using a relay to connect to the battery and have a fuse between the battery and the relay. Then taping into the license plate light as a trigger for the relay (This is so both the LED lights and USB Charger aren't powered when the bike is off). Connect both the USB Charger and toggle switch (controls the LED lights) to the relay and then connecting the negative of both USB charger and the LED light strips to the battery and the ground the relay to the frame.


Couple of questions:


1. Should I also use seperate fuses for the USB charger and LED light strips (i.e. Battery > fuse > Relay > fuse x 2 > USB / LED lights) or is the single fuse bettwen the relay and the battery enough? If so, what amperage should I use for that fuse?


2. Currently I have a 12v 40AMP SPST (single pole single trow) relay and I'm planning on using a single connector with two wires for the USB and LED lights. Would this work or should I get a DPST relay? Also, could I use just the single relay for both the USB charger and the LED lights or should I have those on their own relays?


Hope the description is clear, if not I could try to draw something. Thanks for the any help folks.


Cheers,


Mars

 

[TorontoBoy]

I think you have it right. One relay, one fuse between the battery and the relay, hook up your stuff to the output of the relay. You need not complicate things with more fuses. Both the USB charger and the LEDs are very low amps. You only need the single fuse between the battery and the relay to prevent a short from starting a fire.

I don't know about the difference between the SPDT or SPST. They pull power from the same source, so what is the benefit of SPDT from the single? I'd just go with the single, for simplicity.

 

[mars]

@TorontoBoy thanks for the quick reply. The only benefit i could see is ease in switching parts out but thought I'd ask see if anyone has electrical experience and if it's better to use it in this situation. I agree for simplicity the single one appears like it would get the job done.

Any idea on how many amps fuse I need between the relay and the battery? Should it be the same as the relay?


Sent from my iPhone using Tapatalk

 

[frekeyguy]

what sort of relay are using ? most bosch type of relays are 30amp. using a 30amp fuse will gladly fry your led strip or usb charging device. I'd use something small like a 3amp.

If you use a glass type of fuse - I think you can find a 1.5amp.

Typically, I like to run as small of a fuse as possilbe so electric devices don't get fried.

 

[frekeyguy]

NVM you are using a 40amp relay. This is a very high amp relay, I would run a small fuse like a 20amp fuse between the battery and relay. And a fuse between every electric device. Depending on the device's demand - use a appropriate fuse.

A simple distribution block will help keep things organized / clean and serviceable.

I helped another forum member with some wiring....here is a picture...

more pictures here : https://www.facebook.com/media/set/...073741853.997675950277239&type=1&l=c257bf5e2b

 

[mars]

what sort of relay are using ? most bosch type of relays are 30amp. using a 30amp fuse will gladly fry your led strip or usb charging device. I'd use something small like a 3amp.

If you use a glass type of fuse - I think you can find a 1.5amp.

Typically, I like to run as small of a fuse as possilbe so electric devices don't get fried.

@frekeyguy thanks for the reply bud and for the pictures! Those are a great guideline to follow for how I'll do the wiring. I had that idea in my head but it's always good to have a reference. I've read about distributions block but couldn't get a clear idea of what they were (except the expensive modules with built in fuses that go for $100) would this work http://www.princessauto.com/en/detail/30a-terminal-block/A-p0700339e or do you have another recommendation? It a nice clean way of keeping the LED light strips serviceable.

Adding a fuse to each of the "accessories" makes sense on you explained it. I'll probably go with a blade fuse since those tend to be easy to find.

 

[frekeyguy]

@frekeyguy thanks for the reply bud and for the pictures! Those are a great guideline to follow for how I'll do the wiring. I had that idea in my head but it's always good to have a reference. I've read about distributions block but couldn't get a clear idea of what they were (except the expensive modules with built in fuses that go for $100) would this work http://www.princessauto.com/en/detail/30a-terminal-block/A-p0700339e or do you have another recommendation? It a nice clean way of keeping the LED light strips serviceable.

Adding a fuse to each of the "accessories" makes sense on you explained it. I'll probably go with a blade fuse since those tend to be easy to find.

That PA block would work fine. As long as its a dry place.

The distribution blocks with built in fuses are pretty amazing now. Everything is self contained. but if you don't want to spend that much, a simple cheap distribution block would do the same thing - just not as compacted.