live wire

He's a live wire, Laurence: very, very intelligent and he can keep a whole unit bubbling along.

A live wire had connected with the metal bars of the house, and the electric shock was burning Lysondya's leg.

Indeed, we are told he even demonstrated the deadly effect of a live wire by killing a turkey on the other side of the river!

In the parlance of the present day, he is a live wire, or in other words he has the dynamic force which makes things move.

Dangerous work, as they came to realize after Constans had narrowly escaped being burned by contact with a live wire.

The black wire is the hot side, the live wire, because it carries the full load of the battery up to the bulb.

The strong thought of self is inevitably insulatingit is as restrictive of human contact as a live wire.