I did some testing and there was no measurable voltage between the bond wires and the pump, although my VOM only goes down to a 2 VDC range. There is a slight amount of DC current (.002-.004 milliamps) between the bond wires from the light and the pool deck to the pump bonding lug. (The heat pump is currently disconnected from the pool plumbing.) There was no difference in measurements with the light on or off and/or the pump on or off.

I'm thinking of installing sacrificial anodes on the pool light and in the main plumbing, probably near the heater. Potential brand: http://pooltool.com/anodes.html.

Does anybody have any recommendations for, against or alternatives?

Also, other than code compliance is there any reason to change out the stranded #8 bonding wire for solid?

Thanks.