This cable is designed to split the power from the power transformer that draws up to DC-24V and never should be connected with any power source directly from the regular house or industrial AC outlet.
http://www.EZspyCam.com/index-power.htm

This cable is not designed to use in any form of the water and exposed under the heavy moisture environment.

This cable is designed to use to connect the power supply up to DC-24V and never to connect any power source directly from AC outlet.

Make sure to split the power from a DC power transformer that has enough amperage to cover the required minimum amperage of all connected equipments. 

Seal where all connections with the electrical tape for 100% moisture free when it needs to be exposed under the heavy moisture environment for long period.