Electrical pipes

LESLES PIPES DIFFERENT TYPES OF ELECTRICAL

                           Definition dune electrical conduit Conductors and cables in conduit name of a duct The usual conduits rule to be applied in a conduit The plastic moldings and wooden Plinth buried pipelines pipes Aerial The Busway Exit slideshow

                in a conduit providing protection against external influences. buried on a path of prefabricated overhead cables Definition Definition dune dune electrical conduit electrical conduit Electrical pipe consists of a set of conductors or cables:

                           Conductors or cables conductors or cables A mechanical resistance (shock, crushing) Sealing (to water, dust) Non flame retardant A pipe must have the following characteristics: The choice of a conduit seffectue according to external influences local.

                        The designation of a duct comprises: Example: 16 IRL 3321 Rigid Insulation Tube 16 Lisse (see table) figures3 2 or 4 digits lettres4 Outer diameter in mm Features of the material Mechanical strength and temperature

                          The usual conduits for electrical circuits IRL ** 3321 ** 3321 ** ICA ICTA 3422 ** 3421 ** ICTL CSA 4421 ** 4421 ** CSL MRL 5557 standardized usuelsDésignations Conduits Insulation Rigid Insulation Smooth Bendable Bendable Transversally Ringed insulation elastic insulation Ringed Transversally Smooth Soft elastic composite Ringed Composite Soft Smooth Smooth Metal Rigid conduits flame retardant are orange obligation dencastrer PLASTIQUEACIER material

                         Rule to apply to facilitate the passage of the conductors or cables in conduit n = number of conductors S = total section conductor insulation Sint + = internal chimney section nx S 1/3 Sint Example: A pipe 16 IRL (useful section 44 mm²) (see tables for sections). A driver + sound insulation (H07V-U 2,5²) Total S = 11.9 mm² Either the number of drivers to choose: 44 / 11.9 = 3.69 3 conductors Result: In a conduit 16 IRL, only 3 drivers 2.5 mm² can be passed.

                          TRIM THE PLASTICS & SKIRTING THE WOODEN in a domestic environment in offices in the tertiary Their uses: Recommendations: The wood moldings or baseboards grooved wooden quun can have one driver per slot. With no baseboard molding wood must be placed at least 10 cm above the finished floor. Splicing prohibited in ducts and moldings. Advantages: They facilitate the drivers passing by removing the cover. Ability to add items of use, made for home automation applications (telephone, television, alarm)

                           PIPES BURIED When the passage of this air pipes disadvantages (town, airport, mountain, environment) are used poses buried underground or underground pipes. There are five categories: HTA, HTB, BTA, BTB and TBT Constitution dune buried pipeline roasting fill (warning device) sand (or fine soil) The cable is reinforced (eg armor with steel tapes). Connections are in boxes (marked down) with cable ties and welded sleeves. Cable Installation depth: 0.6 to 0.7 meters for LV cables. 0.8 meters for HT cables. 1.20 meters in urban areas. sommairesuite

                               Four modes of installation trenches Pose: In the passage under the pavements and down side roads. The cables are in the sand (or fine soil) + mesh + bricks on the fence for extra protection, possibly. Installation in gutters and under sleeves: The conduits are usually laid in the ground. Use in factories. The cable may not have protective strips. galleries Pose: The cables are laid on concrete shelves or fixed with clamps. Used for Central departures, substations (high number of cables). Gutter for a turnover of water Tablets carrying the following cables

                              Laying on cable trays: The cables are laid inside the profiles. Use in industry and the service sector. 2 types of cable tray: Type "Cablofil" perforated sheet

                           THE AIR PIPING Use: - BTA and BTB lighting distribution networks. motive power. - The connection and distribution centers of large producers with distribution substations HTA, HTB. Constitution: The conductors are bare or equipped with a weatherproof coating. They have a high mechanical strength. Insulators are used to moor drivers and isolate the support. They are made of porcelain for MV and HV. glass for BTA and BTB. Substrates: - Wood: maximum height of 12 m above the ground. Range up to 50 m. - Reinforced concrete - metal (rigid or articulated pylons) height up to 100 m. Range up to 800 m.

                             PIPES PREFABRICATED For electrical dappareils trips in workshops for example, it is used busbar trunking. Constitution: Conductor bars: the junction with the catch is made by nesting. Insulators: they isolate the bars. A chassis which, ugly accessory, fixed bars and insulators. A metallic shell protecting the conductors. connecting accessories. Selection criteria: network features: DC, AC, single phase, three-phase, current ... demploi. room temperature and nature of the local. Example: "channeled"