[ D]

Direct Burial Cable - A cable installed directly in the earth.

Direct Capacitance - The capacitance measured directly for conductor to conductor through a single insulation layer.

Direct Current (DC) - An electric current which flows in only one direction.

Direct Current Resistance. (D.C.R) - The resistance offered by any circuit to the flow of direct current.

Dissipation Factor - The tangent of the loss angle of the insulating material (Also referred to as loss tangent, tan S and approximate power factor.

Double Foot - Combined length of one linear foot of paired material; i.e., one double foot is equal to one foot of positive material plus one foot of negative material. Usually used in determining thermocouple wire loop resistance.

Drain Wire - In a cable, the un-insulated wire in intimate contact with a shield to provide for easier termination of such a shield to a ground point.

Drawing - In wire manufacturing, pulling the metal through a die or series of dies to reduce diameter to a specified size.

Drum Packed - The method of coiling wire into fiber drums for shipment.

Duct - An underground or overhead tube for carrying electrical conductors.