In building; dados are panels fixed to the lower half of internal walls.
In building; dado rails are decorative and/or functional rails, usually made from moulded timber, fitted traditionally to internal walls to protect them from damage by chairs.
In building; a damp-proof course is a waterproof membrane installed in walls and floors to pre- vent moisture causing damage by rising upwards through the structure. Also termed 'damp course' or 'DPC'.
In electrics; design current (of a circuit) refers to the magnitude (rms value for a.c.) to be carried by the circuit in normal circumstances.
In electrics; direct current (DC) is a type of electricity transmission and distribution by which electricity flows in one direction through the conductor, usually relatively low voltage and high current. To be used for typical 120 volt or 230 volt household appliances, DC must be converted to alternating current, its opposite.
In electrics; a disconnector is a mechanical device which, in the open position, complies with the requirements specified for the isolating function. Another term for an isolator.
In electrics; a distribution board is an assembly containing switching or protective devices (e.g. fuses, circuit breakers, residual current devices) associated with one or more outgoing circuits fed from one or more incoming circuits, together with terminals for the neutral and circuit protective conductors. It may also include signalling and other control devices. Means of isolation may be included in the board or may be provided seperately.
In electrics; a distribution circuit is a circuit supplying a distribution board or switchgear. A distribution circuit may also connect the origin of an installation to an outlying building or seperate installation, when it is sometimes called a sub-main.
In electrics; a distributor is a person or company who delivers electricity to consumers using electrical lines and equipment that he/she owns or operates.
In solar PV manufacturing; dopant is a chemical element (impurity) added in small amounts to an otherwise pure semiconductor material to modify the electrical properties of the material. An n-dopant introduces more electrons. A p-dopant creates electron vacancies (holes).
In building; a dormer window is a window that protrudes from a pitched roof allowing the glass to be held in a vertical position.
In electrics; double insulation comprises of both basis and supplementary insulation.
In building; a dry joint is a brick or timber joint that is not bonded with mortar or adhesive.
In building; dry lined is an internal partition or cladding constructed usually with a timber frame and plasterboard.
In building; dry rot is caused by a fungus and occurs when an open, potentially damp area is insufficiently ventilated.
In electrics; ducting is a system of shafts or tubes designed to carry and protect cables or pipes.
In building; a dwarf wall is a low wall, for example one constructed to support joists under the ground floor.
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