Wire Sizing

Wire Sizing

It is vitally important that the electrical wire from the control box to the pump be of adequate size. Undersized wire will result in an inadequate flow of current to the pump, just as undersized piping restricts water flow. Not only will the pump malfunction, but in the majority of cases the manufacturer's warranty is void if improper wiring practices are followed.

Electrical wire is described by American Wire Gauge number - the smaller the number the larger the wire. The size wire needed depends on the power requirements of the pump and the length of the wire run. The table below shows the maximum length of run for power lines of various gauge.

Lightning Protection

As noted earlier lightning can do severe damage to water systems, even when there is no direct hit. Much of this damage can be prevented by using a lightning arrester. Some pump and motor manufacturers supply control boxes with the lightning arrester already wired in place.

But if the installation is being made where there is even a fair incidence of electrical storms, an arrester should be added if it is not included with the basic pump package. Proper grounding of the arrester is essential for effective protection. The grounding conductor should be as short and straight as possible, and connected to a properly installed grounding electrode system.

For optimal protection in areas with frequent lightning activity, consider installing additional surge protection devices at the main electrical panel. These devices can help protect not just the pump system but other sensitive electronic equipment in the home or facility.

Regular inspection and maintenance of the lightning protection system is recommended, particularly after severe storms. Check all connections for tightness and look for any signs of damage or corrosion that could compromise the system's effectiveness.