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Pool electrics

A dedicated power supply is needed for the pool filter and pumps. This means running a line from the house switchboard to the location of the filtration equipment. In our case, this is at the back of the yard.

We've met with the electrician and discussed options for doing this. One was to bury a cable in conduit from the filter to the house, then run the conduit via a long and confined route through the roof of the house.

The other was to trench the whole way to the switchboard and bury the cable.

The cheapest for us is to trench the whole way to the switchboard because I can dig the trench myself, and a buried cable is a different specification that is cheaper to buy, because it is underground.  Our electrician can then lay the cable at the right depth. A catch is the cable must be at least 500mm deep - so a 600mm trench is needed in practice.

Our sandy soils make this much easier than digging in dry clay, like I remember doing with a mate when a teenager.  There's also only a short section of our old concrete driveway that I'd need to break through.

I bought a trenching shovel and mattock from Masters. If you haven't trenched before, the mattock is for digging most of the trench. The trenching shovel is useful for two purposes - the first 'cut' from the surface because it is so narrow that you foot won't be able to push it into the ground once the trench is deeper than the length of the shovel blade, and then scooping out the bottom of the trench to smooth it off.

To break through the concrete I used my concrete hammer to smash a hole in the side of one of the slabs. A borrowed crowbar then made short work of breaking both slabs.

With the rest of the trench along the walkway used for site access, I' have to wait for the pool concrete to be sprayed before continuing.


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