Oct 27, 2023 · The main cable bundle for the 1st floor is run through the steel rafters above the main HVAC duct, so is nowhere near the dropped ceiling grid. The only exceptions are: Where single cables veers off to wall conduit running down to one of the two network jack wall plates per room or to one of two WAP locations.

Feb 5, 2022 · The nec allos you to bundle conductors as long as it doesn’t exceed 10ft or 10 % of the entire run(310.15a2ex). Does this also apply to conductors terminating in panels?code reference please.

May 10, 2005 · Re: Derate bundling MC cable ? 25, 12-2 wire MC cable would have a total of 50 current carrying conductors and would need to derated at 60% since it would contain more than 20 CCC's.

Sep 29, 2004 · I know where we stand on romex but can we bundle several ,lets say 20 runs of MC for 4 or 5 feet ? Code referance if possible.

Jun 10, 2017 · Regarding residential wiring, I've worked with a couple of different EC's that had different perspective's on what was/is allowed regarding "grouping" of NM cables. Especially as you start pulling HR's through I-joists in the bsmt towards the …

Oct 5, 2015 · The top is good for probably 60 cables, the bottom is two clips locked together, each one good for about 20 cables. Keep in mind Cat 6 is fairly heavy and more sensitive to installation to certify; having high point loads on a bundle of cable because it's not supported right could cause a lot of problems.

May 10, 2017 · What were you planning on tie-rapping to? Caddy makes "J' hooks that work on walls, and ceiling wires. You could probably bundle as many together as needed depending on how you support them. I don't think Tie-raps are listed for MC cable support. There's always ladder rack (jk) Ladder rack sounds like way too much work.

Jan 22, 2013 · Here's my problem. Some of my conduits have up to 23 cables of differing diameters. The Roxtec seals are good for certain diameters or for bundles if the bundles have an OD of certain diameter. I need a verifiable method (what I mean is documentable - I will have to show where I got my equations) for calculating the OD of a bundle of cables.

Aug 6, 2021 · The cable tray rules allow for “random wiring” only for control, single layer spaced 1 cable diameter apart, and bundled in groups of three with 1.5 diameter air gap. This also includes multi conductor cables like MC. Tie wraps is how you maintain spacing.

Oct 7, 2014 · Three phases bundled together, i.e. not parallel bundled together, you need to keep at least at 2.15 X O.D of cable as a spacing. I would recommend using a 3 core, armored cable. You only need 1-diameter between cables and the armor is the raceway, or string poles and use the in - air ampacity of the cable, you may be able to downsize.