The figure shows a 5 inch LDH hose with embedded 460 Volt, 3 phase power wiring. The wiring is used to power electric pumps which perform relay pumping.

 The pump on the left is a Power-Flo PF85000 50 HP pump. It supplies 500 GPM at 175 head-ft. The terrain is assumed to be flat which allows for a very long hose run.

 At the end of the run is PF82500 25 HP pump. It requires 33 Amps. Note that the 50 HP pump will not be getting its current through the hose wires.

 I show a portable pool after the 25 HP pump. My idea is to pump into a portable pool and then turn off the earlier pumps and use the embedded wires to send current to pumps further down the hose. In this case, the #1 25 HP pump would be used to fill the portable pool. Then the #1 pump would be turned off (via Ethernet type network which also passes through the hose) and the #2 pump would be turned on and used to supply water to fight the wildfire.

The 500/2 GPM means that 500 GPM is available at the sprinkler hose for one half of the time. The other half of the time, the pool is being filled.

More pools could be used if the distance from the water source to the fire was longer than the design limit for the pumps and wires. More pools mean that less water is delivered per unit of time. However, some water is better than none.

The last section of hose has sprinkler nozzles that can create a wall of water to stop the advancing wildfire.