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2. Cable tray - Wikipedia

   en.wikipedia.org/wiki/Cable_tray

   Cable trays are used as an alternative to open wiring or electrical conduit systems, and are commonly used for cable management in commercial and industrial construction. They are especially useful in situations where changes to a wiring system are anticipated, since new cables can be installed by laying them in the tray, instead of pulling ...

3. Cable management - Wikipedia

   en.wikipedia.org/wiki/Cable_management

   A more cable-friendly alternative is attaching the lines to special strain relief plates using common cable ties. In case of industrial applications these strain relief plates are also cost-effective because the packing density (meaning the possible number of lines to be fixed on one plate) is much higher than with common cable clamps which are ...

4. Electrical wiring - Wikipedia

   en.wikipedia.org/wiki/Electrical_wiring

   In North American practice, for residential and light commercial buildings fed with a single-phase split 120/240 service, an overhead cable from a transformer on a power pole is run to the service entrance point. The cable is a three conductor twisted "triplex" cable with a bare neutral and two insulated conductors, with no overall cable jacket ...

5. Service drop - Wikipedia

   en.wikipedia.org/wiki/Service_drop

   Commercial and industrial service drops can be much bigger, and are usually three phase. In the US, common services are 120Y/208 (three 120 V circuits 120 degrees out of phase, with 208 V line-to-line), 240 V three-phase, and 480 V three-phase. 600 V three-phase is common in Canada, and 380-415 V or 690 V three-phase is found in European and ...

6. Electrical conduit - Wikipedia

   en.wikipedia.org/wiki/Electrical_conduit

   Some types of conduit are approved for direct encasement in concrete. This is commonly used in commercial buildings to allow electrical and communication outlets to be installed in the middle of large open areas. For example, retail display cases and open-office areas use floor-mounted conduit boxes to connect power and communications cables.

7. BS 7671 - Wikipedia

   en.wikipedia.org/wiki/BS_7671

   Amended (no. 1) and reprinted in 2011 (green cover), amended (no. 2) Aug 2013, amended (no. 3) and reprinted 2015 (yellow cover). Amendment 1 replaced Periodic inspection reports (PIRs) with Electrical Installation Condition Reports (EICRs), a section on surge protection devices (SPDs) was introduced, and some details relating to medical ...