Cable Laying Method-Single Layer

RE: Cable Laying Method-Single Layer

Matt_P — Wed, 24 Jun 2015 20:23:42 GMT

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%".

RE: Cable Laying Method-Single Layer

V Ivey — Wed, 24 Jun 2015 12:13:13 GMT

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?

RE: Cable Laying Method-Single Layer

Matt_P — Tue, 16 Jun 2015 21:29:22 GMT

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.

RE: Cable Laying Method-Single Layer

V Ivey — Tue, 16 Jun 2015 20:23:36 GMT

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?

RE: Cable Laying Method-Single Layer

Matt_P — Tue, 16 Jun 2015 20:00:07 GMT

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).

RE: Cable Laying Method-Single Layer

V Ivey — Tue, 16 Jun 2015 19:33:24 GMT

So, do we have to manually assign the cable laying method for a cable that needs to be in a single layer tray in our cable list, so it knows to route it through the corresponding tray?

RE: Cable Laying Method-Single Layer

Matt_P — Tue, 16 Jun 2015 19:17:48 GMT

The default cable laying method after installation is "Multi Layer". It can be changed in BRCM Setup > Options > Cable Routing. In pre-SELECTseries 1 versions it is specified by modifying the SPEC_CableFill.xml file in the "metadata" folder of the dataset.

So unless specified elsewhere, the software will use the default cable laying method that is specified.

When raceway is placed with Raceway Router, along with Voltage and other properties you can specify a cable laying method.

When cables are imported, a cable laying method can be assigned. If you select BRCM Detail Design > Cable List Import From Excel then click the + button for the XML file row, you can see that you can map a column in the spreadsheet to the Cable Laying Method property.

You can also specify the Cable Laying Method for a cable in Cable Manager if the cable is not already routed.

When the cables are auto routed, they will be routed through raceway that matches the cable laying methods and voltages assigned to the cables.

If you select Help > Contents in BRCM and search for "Cable Routing Logic", there is a chart showing how cable will be routed in various situations