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Old 12-13-2009, 01:02 PM   #1
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Rewireing old house


I'm rewiring a house built in 1947. Adding 100 amp sub panel for new circuits. Question is, when fishing new NM down walls, how can I staple the wire every 4 ft. and within 4 inches of the box? This is the first time I've done "old work" and any suggestions would be appreciated.
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Old 12-13-2009, 01:10 PM   #2
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Rewireing old house


When fishing wire in existing walls you are not required to staple
Only if you open the walls

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Old 12-13-2009, 01:17 PM   #3
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And it is not within 4" of a box. It is either 12" or 8" depending on the box.
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Old 12-13-2009, 01:34 PM   #4
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Thanks.
Any idea how I get the wire passed the fire block without opening the wall?
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Old 12-13-2009, 03:32 PM   #5
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Flex Drill bit, or if Gypsum board without a Plaster skim coat, open up a section above & below the FB, and dril. Leave open to help pull the wire.
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Old 12-13-2009, 04:37 PM   #6
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They sell long 4 or 5 ft. long flexible drill bits at electrical supplies or in electrical departments of some home improvement stores (not tool section!)

These drill bits have a small hole in the end of the bit. So once you drill through, you can attach a small wire to a larger wire and pull it back through the hole.
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Old 12-13-2009, 05:09 PM   #7
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If those "fire blocks" you encounter are actually "diagonals" good luck. We usually have to open up a section of wall to get around those, as those d'versibits don't work too well dealing with hidden diagonals.
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Old 12-13-2009, 05:54 PM   #8
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Thanks all. Since I'm texturing all interior walls, I'll open the walls at the fire block/diagonals and hope I hide all the patches.

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