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  2. Electrical conduit - Wikipedia

    en.wikipedia.org/wiki/Electrical_conduit

    Galvanized rigid conduit (GRC) is galvanized steel tubing, with a tubing wall that is thick enough to allow it to be threaded. Its common applications are in commercial and industrial construction. [1] It is designed to protect wire and connectors. Intermediate metal conduit (IMC) is a steel tubing heavier than EMT but lighter than RMC. It may ...

  3. Electrical equipment in hazardous areas - Wikipedia

    en.wikipedia.org/wiki/Electrical_equipment_in...

    All equipment in Division 1 areas must have an approval label, but certain materials, such as rigid metallic conduit, does not have a specific label indicating the Cl./Div.1 suitability and their listing as approved method of installation in the NEC serves as the permission.

  4. Duct (flow) - Wikipedia

    en.wikipedia.org/wiki/Duct_(flow)

    Ducts for air pollution control in a 17000 standard cubic feet per minute regenerative thermal oxidizer (RTO). A round galvanized steel duct connecting to a typical diffuser Fire-resistance rated mechanical shaft with HVAC sheet metal ducting and copper piping, as well as "HOW" (Head-Of-Wall) joint between top of concrete block wall and underside of concrete slab, firestopped with ceramic ...

  5. Protective distribution system - Wikipedia

    en.wikipedia.org/wiki/Protective_distribution_system

    In a hardened carrier PDS, the data cables are installed in a carrier constructed of electrical metallic tubing , ferrous conduit or pipe, or rigid sheet steel ducting. All of the connections in a Hardened Carrier System are permanently sealed completely around all surfaces with welds, epoxy or other such sealants.

  6. EMTP - Wikipedia

    en.wikipedia.org/wiki/Emtp

    Hypersim is currently commercialized by Opal-RT Technologies Inc. PowerFactory – DIgSILENT has a full EMT-type simulation module. MathWorks commercializes a toolbox named Simscape Electrical which is based on the state-space approach for solving electrical circuits and benefits from the powerful control system simulation environment of Simulink .

  7. Nipple (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Nipple_(plumbing)

    Nipple. In plumbing and piping, a nipple is a fitting, consisting of a short piece of pipe, usually provided with a male pipe thread at each end, for connecting two other fittings.