In the first part of the question there will be only one wire in the conduit, in the second part of the question there will be two wires in the conduit.
Plumbing pipe threads are squared and conduit pipe threads are tapered.
derating
Um. One is hung above your head on telephone poles and the other is ran underground in conduit? Unless you meant something else? Also burying cable costs ~10 times as much for transmission lines as overhead. It also usually has a lower power carrying capability, since it cannot dissipate heat as readily as an overhead conductor.
The small river served as a natural conduit between the lake and the ocean. -ExoMo
Armored electrical cable contains insulated electrical service wires protected by a flexible steel covering. Metallic Conduit is a tube or pipe though which we lay electrical cable.(Most commonly lighting cables).
You can have only one current carrying conductor in a conduit, but that conduit must have a slot to relieve the eddy currents that will be created by the transformer effect created by the conductor. It is better to run the neutral or opposite conductor along with the hot conductor together in the same conduit, or through the same penetration, so as to minimize this effect.
No, the bare copper grounding conductor can not be in a conduit with other conductors. It can be in conduit by itself to provide mechanical protection for the wire.
No, each conduit must contain a separate grounding conductor.
Cleat wiring is exposed while in conduit wiring the wires are well protected inside tubes/pipes.
Plumbing pipe threads are squared and conduit pipe threads are tapered.
derating
transmitter, wire, channel, conduit, director, pilot
The sizing of conduit systems that wire has to be pulled into is dependant on the physical size of the conductor being drawn into the conduit. The second governing factor is the conductor count of the specific conductor that is needed. A 500 MCM copper conductor with an insulation factor of 90 degrees C is rated at 430 amps. This is where the conductor count is need by the service, as to whether the service is single or three phase. In this specific case, the electrical code will allow both single and three phase installations to use the same size conduit. A maximum total of four 500 MCM conductors can be drawn into a 78 mm diameter conduit.
THHN is a heat resistant thermoplastic insulated conductor, usually a single conductor. Romex is a brand name for a nonmetallic sheathed cable, it has multiple conductors inside, the insulated ones are insulated with THHN insulation.
Perhaps you mean "aqueduct" a conduit for carrying water.
There is little difference in infection rates or in renal deterioration between the conduit surgical techniques and the continent techniques. The patient's preference becomes important.
an exposed conduit used for carrying electrical wires/cables