I know it's not a good idea to work off an aluminum ladder while doing electrical work.
Even in the pool?
And since the pipe to the house is plastic, it's bonding. If it were a metal underground water pipe, it would be both grounding and bonding.
The way I think about grounding versus bonding when I DIY is as follows.
The easiest way to understand grounding is that in the electrical system all connections made from the system to planet earth is considered “grounding” and serves the following main purpose.
High-voltage system windings are grounded to the earth to help limit high voltage imposed on the system windings from lightning, unintentional contact with higher-voltage lines, or line surges.
Metal parts of electrical equipment must be grounded to the earth by electrically connecting the building or structure disconnecting means with a grounding electrode conductor to a grounding electrode.
Examples of grounding electrodes are: metal underground water pipe; metal frame of building or structure; concrete encased electrode (ufer); ground ring; rod or pipe electrode; or, a plate electrode.
The grounding of the electrical system to the earth is for lightning & line surge emergencies and to aid the utility company. It will never help in clearing a breaker or fuse at the actual dwelling.
Why?
Typical ground rod might have 20 ohms of resistance. Ok….120V source and 20 ohms of resistance/impedance….120V divided by 20 Ohms =6 amps
That will not clear a 15 amp breaker.
So what is bonding?
To remove dangerous voltage on metal parts from a ground fault, electrically conductive metal water piping systems, metal sprinkler piping, metal gas piping, and other metal piping systems, as well as exposed structural steel members that are likely to become energized, must be bonded to an effective ground-fault current path [250.4(A)(4)].
It is also important to remember the important role electrical metallic conduit serves as well for bonding….this is not grounding !
What is important to understand with bonding is that proper bonding of metal piping and conduit within the structure offers a low resistance fault current path back to the source in the event it becomes energized allowing the breaker or fuse to function properly.
Without this path you can guess what would happen if a clumsy plumber were to touch metal that might become energized….
So, dummies' summary for plumbers: Grounding is the connection to earth and bonding is the connection of metal parts to provide a low impedance path for fault current to aid in clearing the overcurrent protection device and to remove dangerous current from metal that is likely to become energized.