Reticulation wiring that leaves the control box is not dangerous.
As a general rule if you feel anything when you touch the wires it will be a light buzzing in your finger tips. That’s because its low voltage – around 24v and it isn’t enough to hurt you.
The Control box has an inbuilt transformer that reduces the current from 240v so that any wires beyond the controller are safe.
NOTE: DO NOT TOUCH THE 240V WIRES INSIDE THE CONTROL BOX!
That’s also why wires usually aren’t laid in conduit. Most installers will tape the wire to the underside of the main reticulation pipe to protect it, but apart from that it sits free in the ground.
If you happen to chop thru some wires then you can simply rejoin them with insulation tape and all should work again. For some people wiring just isn’t their thing at all and its easier to call someone. If that’s the case then we’d be happy to hear from you.