When we first started this irrigation
project the budget was a bit limited.
I'm sure it breaks every law
of proper electric wiring, but sometimes you've got to do what you've
got to do.
It's basically four 100 foot extension cords cobbled together and wired
so each pole is carrying 110 volts. I'm pretty sure this is close to
the maximum distance you should think about stretching these cords.
Electrical tape works well for sealing up the junctions where each cord
is plugged into.
We're going on the third year
of this setup. There was a problem in the
beginning with the pump connections, but I solved that by figuring out
how to make the contact points waterproof.
If you feel like you're
testing the limits of safety try picking up the
cord in question to see if it's giving off much heat while you have
your pump working. It's this heat
that can be dangerous and must be dealt with by making the distance
shorter or the electrical cord thicker.
Thanks to askmediy.com for the picture of an electrical box with a few drawings showing where to wire up a 220 volt piece of equipment.
http://www.askmediy.com/articles/how-to-install-a-220-volt-outlet.html