Cable Laying Method-Single Layer

I am looking for information on Cable Laying Method within BRCM, specifically, how do you route Single Layer cables?

Does BRCM know because of the cable type (i.e. 1/0, 4/0, 500, etc) that is should be in single layer tray, or do we need to manually specify this in the cable list that we import?

I am unsure of what BRCM's intent is to route different cable types.

  • Max Capacity applies regardless of the Cable Laying Method, I believe. For the Single Layer method, only half of the tray will be filled with a single layer if you set Max Capacity to 50%. So if you want the cable fill to be limited only by the Cable Laying Method, you would leave Max Capacity set to "<none>" or set it to "100%".



  • Is it required to assign a Max Capacity if we are using a different Cable Laying Method for Cable Tray? I would think that BRCM uses the parameters in the Cable Laying Method to make sure the tray isn't overfilled (based on total outer diameters and spacing to fit linearly in the tray). Is this true?
  • Well, single layer does not really make sense for conduit, and assigning that precludes you from assigning something else like "NEC rules for conduit fill". I thought it would still work, but I've been advised that a cable with the single layer method assigned will not get routed through conduit.  So it would be better to not assign a cable laying method to the cable in this case, and to only assign it to the raceway. You would still assign Voltage level to the tray, conduit, and cable.  If, based only on Voltage, the cable does not get routed through the desired raceway you can force it by using the Include option in AutoRouting Entry Points.



  • Great!
    What cable laying method would you use on the raceways for a single layer cable that needs to go through both conduit and cable tray? Cable tray, you would assign Single Layer, but can you do the same for Conduit?
  • Yes, unless all cables in the project need to be in a single layer, in which case I think you could just change the default cable laying method to that in Options. Or, if the cable laying method depends more on the system (cable ladder, conduit, etc.) and/or voltage level than specific cables, perhaps you can achieve what you're trying to do by merely using Overwrites on BRCM Setup > Options > Cable Routing (click the Help button there for information on Overwrites).



    Answer Verified By: V Ivey