Get the electric fence tester
Put stick/prong looking thing, into earth.
Using the little hook at the top of the box, hook this into the electric tape.
Twist the tester, so you can see the box with the lights showing
Watch to see how the tester lights up on the level of currents shown.
If nothing is lighting up = electric tape not working.
Keep moving towards the mains electric box (by large gate into sand school), to find the electric current working, and then you will understand how it looks, when electric tape is working. e.g. flashing light, showing on the tester box, means there is a current, and how strong it is.