Yes, listed below are the requirements for both joist and studs:quote:Are there any guidelines to follow when drilling thru studs, joists, rafters and such.
Holes: Do not bore holes closer than 2" from joist edges, nor make them larger than 1/3 the depth of the joist.
Notches: Do not make notches inthe middle third of the span where the bending forces are greatest.
Notches should be no deeper than 1/6 the depth of the joist. Notches at the end of the joist should be no deeper than 1/4 the depth. Limit the length of notches to 1/3 of the joist’s depth.
1” is the max diameter , we can have in 2 x 4 [3.5”] studs and avoid the 1/16” nailer plates due to the 1.25” NEC rule. (NEC rule: all wires must maintain a minimum of 1.25" from edge of stud on both sides) If you end up getting closer than this then install a metal nail plate across the studs edge. Three NM-B 12-2G ,Romex® will not require a hole larger than 1"..as 3/4" is a bit traumatic on the sheath, when pulling (3)size 12-2G NM cable.
¾” hole for (3) 14-2G
1” hole for (3) 12-2G
For structural (not electrical) reasons, keep your bored holes dead center top to bottom, and at least three inches apart (edge to edge). Don't drill through any trusses whats so ever.
Although derating requirements begin at a lower level, when using NM-B cable, it usually does not become an issue until you run more than four cables together (for more than 24 inches). This is a simplification of the actual rules (and hence isn't correct 100% of the time, but 99% is close enough). So, if you bundle 3-4 cables together you should be fine running 3-4 of these bundles up the chute.quote:How many wires (12-2 mostly) can I run together (meaning, in contact with each other)?
Before you start any work I would suggest that you buy a good book, Black and Deckers book on Homewiring is a good one and will give you lots of details you need to know concerning placement of switch boxs, receptacle boxs, lights, etc as there are specific rules. Also, any and all juction boxs must remain acessible at all times.