Brake wire junction

[cole3444]

Thanks Agent 86 for the site. I had forgot about them. Ordering the terminal blocks and shipping will be between $7 and $8. Big difference. They are now in my saved list.

[J. Morgan]

I but a lot of stuff from Del City.

I like um!

[lewster]

Originally Posted by cole3444

Thanks Agent 86 for the site. I had forgot about them. Ordering the terminal blocks and shipping will be between $7 and $8. Big difference. They are now in my saved list.

Sorry,

I hadn't realized that their shipping for small quantities was so much. My parts bills with Waytek usually run several thou per order, so the shipping is no big deal at that level.

[Chuck]

bumping an old thread, but I was wondering:

10 or 12 gauge for new brake wire? (going to re-do mine; 2 axles).

as for the junction method, any reason not to use something like this to bind all 5 wires to:
https://www.amazon.com/Sierra-Intern...MHV5SWJJNQP16P

Or is the single terminal post (1 for pos, 1 for neg) preferred?

[Action]

Each brake may draw 3 to 3 1/2 amps.

12 gauge wire should handle up to 20 amps. A 10 gauge is larger wire. I would not go smaller than 12 gauge.

The junction bar you show works well for installations that are not exposed to weather.

>>>>>>>>>>>Action

[lewster]

Your brakes are of extreme importance!!! In calculating potential voltage drop in a DC circuit, the length of the current path consists of both positive and negative circuits, or the wire length times TWO.

I would use a 10 AWG for your brake circuits, using either stranded marine cable or dedicated brake cable. The price of safety is not worth the difference in cost between 12AWG and 10AWG.


Lew Farber

[prairieschooner]

You may find this helpful

[Chuck]

Thanks...so according to the pdf, 12 would be adequate, but what the heck?

I don't mind going with 10; the cost difference is insignificant. I just wanted to make sure there was no down side with doing that.

Also...the bus bar. would the single post be better, or does it not matter?

[prairieschooner]

As far as the wiring I would think that Lewster is saying to err on the side of caution. Here is a link to a wiring chart that may also help;
http://assets.bluesea.com/files/reso...on_chartlg.jpg

You may want to check with the manufacturer to confirm what Voltage Drop they say is acceptable. Keep in mind a 10% Voltage Drop would equal about 1.3 Volts DC or so where a 3% Voltage Drop would equal about 3.9 Volts DC using 13 Volts DC as the base.

[slowmover]

RV.net has at least one very very good link to re-wiring trailer brakes. See the travel trailer section. ANCOR Wiring is tough to beat. Terminations and junctions of equal quality are covered. With photos.