Chuck a drill bit sized to allow the cable to pass easily through the hole it creates.
Cables through attic.
How to run wire through an attic step 1.
This bit should be at least as long as the amount of the coat hanger bit that was needed to penetrate the space.
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Be sure to leave enough slack on both ends to make connections.
When you must deal with an attic space because you can t run the cable by simply pushing up the ceiling tiles there a few things to consider.
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How id do it if you put your cables to the edge where the apex of the roof meet the ceiling so you basically end up with your wireing loom at the edge of your attic then clip your cables along the ceiling joists 50mm from the plaster board then its clear of insulation and if you need to lay a floor you can but do try to avoide drilling hole through the joists as you will not meet the requirements as youll be less than 50mm from each each edge if the ceiling joists are 75mm.
Find your attic access.
Measure the distance between the two sites you want to run wire between and make sure you will have enough wire.
Support cables at 4 1 2 inch intervals with appropriate staples or clamps.
Feed cables through the holes.