Autodesk Revit MEP

[#1]

When you have a multi circuit home run Revit will properly add home run arrows and phase/hot wires. However it will not add additional neutral or ground wires. If you have more than 3 circuits (usually A/B/C phase) in a home run it is necessary to run an additional neutral. Additionally if you have less than 3 circuits and more than one are on the same phase (ie. ckt 1 and 2 are both on phase A) they must have their own neutral. Revit does not accommodate this.

To compound matters, if the home run is a multi circuit then you cannot manually modify the number of wire ticks (see attached jpg). On a single circuit home run I can modify the number of wire ticks for each wire (hot, neutral, and ground), but as soon as I make it a multi circuit home run this is disabled.

What is the purpose of the Tick Marks=Calculated/On/Off property? I can tell when the property is off the tick is not displayed, but Calculated/On do not seem to have any effect.

I also tried creating a new wire type that had the "Share Neutral Conductor" and "Share Ground Conductor" unchecked. This seemed to have no effect, so I am not sure what these Family Parameters govern.

Is there something I am missing or is this a Revit limitation/oversight?

thanks,
Jeff

[#2]

TexasJetter,

Were you ever given any response to this? I just had this question come up, and I don't see that it is any different in 2012 MEP. What did you end up doing?

Thanks,
Casey

[#3]

I am also dealing with a similar issue with the tick marks. I am working in Revit MEP 2013 and there still doesn't seem to be a way for Revit to produce the desired result on its own. I believe this is an instance where I am just going to have to "fake" the information. In my case I have used a j-box family with multiple connectors for the multiple loads so that it shows up correctly on my panel schedules. I will have to manually draw the home run and  to represent the number of nutrals and hots in the order that I want and then creat a group out if those elements. It will be a visual represnetation only and I will have to use a standard piece of annotation  to describe the home run information. I don't know of any other way to show the tick marks for multiple circuits such as these. I would be interested to know what others have done to work around this issue.