Long power cable

I have a long power cable nearly 20 meters.Problem that I can get signal in 100 meters between access point 532 and station. I installed it on the roof .Is it possible the main problem long power cable .I changed antenn mode also from a to b and vieca versa.It is not affected . We tired already to test everyday this routers.Before installing this power cable we could get a signal betwee -84 -86. In any way it is not good signal too.

In configuration everthink default rates. 2412 ,B statndart and so on.
We have four RB 532 routers.It is not possible that all four routers not working.

Help guys.

i can tell you what i did…

i have 2 RB530’s, they recive power from a 4.2A 48V psu, the cable is 20m and there’s a splitter connecter at the end, so one twin flex cable feeding the 2 RB’s. NO problems. If you are using the standard psu (0,4A i think) you might get problems with the power. As far as i know mikrotik cant supply you with a bigger psu (couldnt help me), so have one built.

On the mains power side the cable can basicly be any length.

Hope it helps

Carel