You can use a compass to see if the line is powered. Just hold it level and find north, then move over the wire. If the needle swings then there's current going through the wire.
You could also "guesstimate the direction its going to, and if it goes towards a house or outbuilding, try to find where it enters inside the basement wall and if it goes to a power source.
You might get an idea about what its purpose was and be able to disconnect it and leave it safely in the ground, saving a lot of digging.
You could also "guesstimate the direction its going to, and if it goes towards a house or outbuilding, try to find where it enters inside the basement wall and if it goes to a power source.
You might get an idea about what its purpose was and be able to disconnect it and leave it safely in the ground, saving a lot of digging.