IMO, it isn't always about regional brake laws (which is often based on a flat number).
For example:
- My local law says max 3,000 lbs and my loaded boat/trailer @ 2,600 lbs combo pushes my mini-van around like a rag doll. I installed electrical brakes on my boat training a braking power is amazing. Yet, my local laws stated my boat trailer doesn't need brakes.
- CA laws states any trailer above 1,500 lbs needs brakes. Does a 1,600 lbs utility trailer behind a V12 Hummer need brakes on the trailer? Their law says it does.
IMO, connected trailer needing brakes should be about payload number of its attached Tow Vehicle - instead of a flat meaningless number of a perfect white board world.
For example, a Ram 1500 has payload up to 1,930 lb (875 kg). Anything above its payload number is "over taxing" its factory brakes. Thus... If attached trailer is above this number, then install brakes on the trailer. And if attached trailer is below this number, then only factory vehicle brakes are good.
For me, my little tow vehicle can easily tow 3,500 lbs but I use its payload number to determine if my attached trailer needs brakes. If it were me, I would install brakes on loaded 2,600 lbs trailer that is connected Ram 1500 pickup - regardless of one's regional laws. Try with and without brakes to feel the difference yourself.