No, each conduit must contain a separate grounding conductor.
In a completely metallic conduit system it is not necessary to ground each junction box as long as the metallic system has the grounding capacity rating larger than that of the over current device protecting the circuit. The code book states what size conduits are rated at, for grounding amperages.
PVC is cheaper but is used differently. PVC is usually baried in ground and emt usually runs exposed. You can use PVC exposed if it is schedule 80 gray PVC electrical conduit. Schedule 40 is for under ground
depends on size....
Metal conduit must be buried to at least 6 inches. Non-Metal conduit must be buried to at least 18 inches. Direct bury wire must be buried to at least 24 inches. This is what the NEC requires but your local codes may be even deeper. Check with your local utility to see what they require.
Wire in conduit for underground feeders has to have an insulationrating for wet and damp locations. In the marketplace there is also wiring thathas an insulation rating for direct burial that does not need to be installed into conduit.
PVC conduit is better then metal as it won't corrod under ground and theres less of a chance of electrical shortages.
== == Think about it. The conduit is metal, and can be touched by people. It is carrying live wires and is connected to steel junction boxes. What would happen if a hot wire accidentally touched the steel conduit? The ground wire is there to keep the conduit from going live in a fault condition. You want to ground any metal surface a user can touch in case of faults.
Generally, when using PVC conduit you should also run a ground wire.
An electrical conduit is a tube used to protect and route electrical wiring in a building or nonbuilding structure. Electrical conduit may be made of metal, plastic, fiber, or fired clay. Most conduit is rigid, but flexible conduit is used for some purposes.
The green wire on the light fixture is a ground wire. If there is no ground wire in the conduit, the green wire should be attached to the metal box with a screw.
It depends on what you want it to look like. it could be run underground in plastic conduit. Above ground in metal conduit, or overhead. If there is a fence or railing running from the breaker to the hot tub the conduit can run along that. If it is run along the ground it should be marked or covered to avoid accidental damage to it.
In a completely metallic conduit system it is not necessary to ground each junction box as long as the metallic system has the grounding capacity rating larger than that of the over current device protecting the circuit. The code book states what size conduits are rated at, for grounding amperages.
Metalic conduit is a metal tube that is used to shield wiring from damage, water contamination, contact with people. As opposed to plastic conduit.
It will induce a slight (as in negligible and unnoticeable) current in the conduit.
If the existing conduit has not been intentionally or accidentally interrupted it is still an adequate ground. If you are in doubt about this or if a test proves that it is not grounded, new conductors including a new ground wire can be pulled inside the conduit. If the existing conduit is flexible conduit and it has "jake" type twist connectors, rewiring with a ground is advisable as those type of connectors do not maintain a good ground connection.
Not normally. An elaboration of what circuits are in the conduit and what type of conduit it is would be useful, though, and necessary to give a definitive answer.
to prevent live conduit in case of short circuit