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Home theatre wiring through false ceiling

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Old 18th July 2011, 01:29 PM
 
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Home theatre wiring through false ceiling


Hi,

I'm a novice in audio wiring. I don't have a home theatre purchased yet but would like to plan for the wiring through false ceiling now and purchase a home theatre after a few months. Can someone suggest what exactly is required to be done now and what can be done later? If possible, I'd like to make provision for wiring now so that actual wiring can be done later on after I decide on what exactly to buy. Currently the provision can be made for a typical 5.1 system.

Thanks
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Old 19th July 2011, 12:03 AM
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Re: Home theatre wiring through false ceiling

get the pipes laid out in such a way that cables can be sent through them later. No need to put wires right now.
You can push a stiff wire through the pipe from remote end, tie speaker/ projector cables on it when it comes out of the end closer to your equipment, and then pull back. Keep ample space to push through hdmi cables.
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Old 19th July 2011, 12:26 AM
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Re: Home theatre wiring through false ceiling

remember to run the pipes separately for spk cables. running your spkr cable in a pipe containing any other wires like ekectrical or telephone cable is a strict No-No.

also keep provision for separate power supply for a sub woofer. this will be required if you chose to go for a higher end HT. most good quality subs are active type and need a separate power supply.

for placement of speakers, do not forget to visit DTS and Dolby websites.
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Old 19th July 2011, 12:27 AM
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Re: Home theatre wiring through false ceiling

When installing closed pipe/duct/trunking for future installation of cables, one trick is to run several lengths of string, and tie them off at both ends.

You can use each length to pull through one, or several, cables, as and when.

Colour coding, or number of knots, or some such end-matching is optional, but makes the cable pulling a one-person job.
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Old 19th July 2011, 07:25 AM
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Re: Home theatre wiring through false ceiling

Thad's suggestion is good-electrical contractors here normally use GI wire for this purpose.
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Old 19th July 2011, 07:49 AM
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Re: Home theatre wiring through false ceiling

To add to above, carefully think about what all cables you will need to pass through the ceiling. If you have plans to run HDMI, ensure you have a 2-3 inch plastic water pipe running from your AV rack to where your Projector would be mounted.

Also please search as there are several threads discussing this where you'll get info.
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Old 19th July 2011, 09:17 AM
 
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Re: Home theatre wiring through false ceiling

Once the pipes are laid and the false ceiling is closed, it becomes very difficult to draw wires at a later date. The reason for this are the bends where wires tend to get stuck. This is even more critical if you are bunching more than one cable in one conduit pipe.

Assuming you are installing a 5.1 with projector, and if you want things to be easy, here is a list of conduits that you need to lay:

1. Five 3/4" inch conduits for speakers cables.
2. One 2 inch pipe to carry HDMI, three CAT5 and one coaxial cable for video.
3. One separate 1/2 inch pipe to carry power to the projector with earthing. This should be at least 6 inches away from the 2 inch pipe.
4. Two 3/4" pipes to carry two coaxial cables for a Point 2 sub woofer placement.
5. Conduits for power to the system (five points) and two conduits to carry power to the subwoofer.

Remember the bends should be smooth. As said by George, each conduit must carry a GI wire that can be used later to draw the cables. Do not use strings as they will snap when you are drawing the cables.

Cheers
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Old 19th July 2011, 03:07 PM
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Re: Home theatre wiring through false ceiling

Feel free to substitute something stronger than string ...but I do mean a decent string, not some thin thread that will break. You should not be able to snap it with a hard tug.

What's "GI" wire? Is it like the curtain wire (a thin, tightly coiled spring spiral about 2mm in diameter)? That is the stuff pros use when they have to push through a conduit. It is very flexible, but not flexible enough to kink or bunch up. Right-angle bends are not absolutely impossible, but they are a challenge!
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Old 19th July 2011, 05:42 PM
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Re: Home theatre wiring through false ceiling

very good thread. I am also in the same boat, concealed wiring for HT. Pls see my other thread
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Old 19th July 2011, 06:18 PM
 
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Re: Home theatre wiring through false ceiling

Quote:
Originally Posted by Thad E Ginathom View Post
What's "GI" wire? Is it like the curtain wire (a thin, tightly coiled spring spiral about 2mm in diameter)? That is the stuff pros use when they have to push through a conduit. It is very flexible, but not flexible enough to kink or bunch up. Right-angle bends are not absolutely impossible, but they are a challenge!
GI stands for Galvanised Iron. It is basically a thin wire that is very cheap and available in large rolls. You use the spring to to go through a conduit with all it's twist and turns. Once the spring is through, you tie a GI wire on the other end and pull the spring out completely. You leave the GI wire in the conduit by knotting at both ends. When you are ready to insert a cable, you tape the cable to the GI wire, twist the wire on the cable, and then pull it through. This is actually a two man job. One pushes and the other pulls. Many times it is just safer to coat a bit of oil on the cable so that it slips through easily.

Cheers


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