"Lad wire" is not a common term in electrical engineering or construction. It's possible there's a misunderstanding or you're using a local or specialized term.

Could you please clarify what you mean by "lad wire"? Perhaps you're referring to:

* Lead wire: A type of wire used to connect components in electrical circuits. It's often made of thin, flexible copper wire with insulation.

* Land wire: A type of wire used in underground electrical systems, connecting the neutral conductor to the earth. This is often referred to as a grounding wire.

* Lead-in wire: This refers to the wires connecting the electrical service from the power lines to your home or building.

Please provide more context or information about the wire you're asking about, and I'll be happy to help you further.