There are both industrial and home owner cable pulling techniques. The former may involve heavy equipment and cable greasing and many people. Pulling cable on a small scale involves a snake and sometimes a pull cord. A snake is a coiled metal strip that you push through the conduit. When it comes out the other end or to a pull box you connect the wire and pull it back through the conduit. If more wire might be pulled later, also attach a pull cord so it will be left behind in the conduit for future use.
A 100 foot fish tape and wire lubrication will be needed to make this wire pull.
You can pull 10 #3 gauge wires in a 2 1/2" conduit.
The chance of causing a break in the wire, or damage to the wire covering or coating. Also, it is not that you shouldn't pull on cables as in running electrical conduit in a building, it is common that the electrician has to "Pull"the wires through the conduit. The electrician generally knows how hard he can pull without damaging or chafing the wires.
Need to know the wire # size to compute wire fill in conduits
What kind of wire? If it's a power wire, why is the place wired with conduit? Commercial buildings must put all power wiring in conduit, so if you're planning to run romex in a commercial building, the answer would be "no", it's not permissible. If it's data wire, note that there may be some "crossover" interference if the data wire follows a power wire for very much distance. It's usually not a problem to cross a conduit and tie to it, but it's generally recommended that you not tie data cable to conduit.
A 100 foot fish tape and wire lubrication will be needed to make this wire pull.
You can pull 10 #3 gauge wires in a 2 1/2" conduit.
The chance of causing a break in the wire, or damage to the wire covering or coating. Also, it is not that you shouldn't pull on cables as in running electrical conduit in a building, it is common that the electrician has to "Pull"the wires through the conduit. The electrician generally knows how hard he can pull without damaging or chafing the wires.
Need to know the wire # size to compute wire fill in conduits
No, it is generally not necessary to break the ground wire at a pull box and bond it to the box. The ground wire should instead be continuous and connected securely to ensure proper grounding throughout the electrical system.
What kind of wire? If it's a power wire, why is the place wired with conduit? Commercial buildings must put all power wiring in conduit, so if you're planning to run romex in a commercial building, the answer would be "no", it's not permissible. If it's data wire, note that there may be some "crossover" interference if the data wire follows a power wire for very much distance. It's usually not a problem to cross a conduit and tie to it, but it's generally recommended that you not tie data cable to conduit.
Yes. If they are single wires they need to be in a conduit.
what is meant by pull back effect when pulling in electric cables in conduit
You should probably use electrical conduit approved for this purpose, and not hose - anything else is unsafe and will fail. To get the cable through the conduit: Find a styrofoam ball, ping-pong ball, or similar very lightweight ball just slightly smaller than the inside diameter of the conduit. Push the end of a piece of lightweight nylon twine (longer than your conduit) through the ball and tie it in a knot. On one end of the conduit, attach the hose of a shop-vac - and at the other end, drop in your ball. The vacuum will suck the ball and twine through the conduit. Retrieve the ball. Then use the twine to pull your line through the conduit (if small wire), or to pull a length of stronger rope or cable through before attaching it your wire.
Conduit wiring is simply wiring that you find in a conduit. Typically, a conduit is a small round tube, usually metal but sometimes plastic, that carries wires from one area to the next. Wire has a tenancy to sag and get tangled and such when it is laid out in long distances. The conduit serves to protect the wire and to ensure it stays linear and it stays in place.
There has to be a pull box between every four quarter bends in a conduit run.
No, a single ground wire can be used for multiple circuits in a conduit as long as it meets the sizing requirements based on the largest circuit conductor in the conduit. The ground wire provides a path for fault current to safely return to the source in case of a fault or short circuit.