What do you guys think of this drawing? will be using 16AWG for triggering, 12AWG for distribution block to relay and relay to lights, and 4AWG for battery to Distribution block.
Using Fused distribution block so that each line has its own fuse at 20Amps.
http://www.we-todd-did-racing.com/wetoddimage.wtdr/wODI4NTU1NnM0MTNkZmQzMXk1NDE%3D.jpg
Thanks to Psydotek for some inspiration.
Please let me know of anything you would change or any comments at all.
-Ian

I think it looks just fine. :)

Thank you for the reply. Any other comments out there?
Also What do you think about having a 3 position switch so that I can turn the FF1000s on any time I want and also have them turn on and off with the highbeams. I would put a wire to 86 on the FF relay going to the center pole on the switch. Then at either end I would have power in and power from 87 on the highbeam relay. Is that ok to take power from 87 on the high beam relay as long as I fuse it?
Thank you
-Ian

Looks good. :) Though you may want to consider using 10ga wire to carry power from the distribution block to the relays and for the grounding wires after they've joined together from each pair of lamps and are going back to the chassis/battery ground. (2 12ga coming off the lamps then going into a single 10ga cable. it means more splicing/crimping, but will be safer).

What wattage bulbs are you planning on using for the FF1000s?

I think it comes with 55watters so I will probably stick with them maybee a differnt manufacturer though. Is it worth it to go to 100 watts? I should use 10 guage for everything, even if planning on using stock wattages? Hmm where did you get ur 10 guage stranded? I work for an electrician so I only know where to get solid household.
-Ian

Your regular electronics store (Radio Shack or Frys Electronics) should have 10ga stranded.

Even if you go to 100w bulbs you won't need to run 10ga for everything. Having 12ga between the relay and the lamps will be fine since the load will be split between two wires (the dual 87 pins are great for this). It's just at the portions of the harness where you have a single wire carrying power or grounding for 2 lamps is where you'll need the 10ga wire (i.e. between the distribution block and relay pin 30). 12ga would be acceptable, but only if you decide to stick with 55w bulbs for the FF1000s.

Thanks a bunch for the info do you think 100w bulbs are good if so what ones do you recommend?

I haven't gotten around to experimenting with anything higher than 55w, but Narva bulbs are reputed to be some of the best. You also can't go wrong with Hella bulbs found on www.rallylights.com.

Oh, here's another page you may want to check out: http://ken-gilbert.com/techstuff/AWG_WIRE_TABLE.html

It has a chart of the limits of different gauge wires. It's helpful when deciding what gauge wiring to use assuming you've already determined how many amps you'll be needing to draw through each section of the harness.

wattage / system voltage = amps needed

So for a section of wiring needing to carry the load of 2 lamps at 100w on a 12 volt system would need to be able to handle 16.7 amps and according to the chart 10ga wire will be fine. For the section of wiring between the relay and lamps, and since each lamp (at 100w) gets it's own cable you'd need something that can handle 8.3 amps which means 12ga is perfect. You won't be able to run 135w bulbs, but unless you're a little nuts (like Rapid_roo) you'll be fine with 100w bulbs. :)

[i hope i didn't confuse you more] :lol:

Yeah I completely understand only need 10 guage for the grounds and between the block and 30 on the relays. I just chose 12 guage cause it could hold 13.06 amps witch i figured the lamps would be drawing 10.1 amps. But I guess I might as well leave room for upgrading.
-Ian