This means that electricity can flow through them, but not very well.
Before the war, an emergency line kept the electricity flowing.
If electricity flows from hot to ground through you, it could be fatal.
A conductor is a material which electricity, heat or sound can flow through.
However, electricity will not flow easily in the reverse direction.
Phones, on the other hand, often continue to work because their electricity flows over separate phone lines.
In the picture, the electricity flows through the reddish part.
But when you touch the gate with the drain, electricity will flow.
But when the systems lose power they block the electricity flowing through the telephone company's network.
When it is dark, almost no electricity flows through.