Change voltage of circuit

[DoTheBIM]

I've downloaded and started playing with Revit MEP. I know RAC very well... but wanted to see what all this MEP stuff was about. So I went and created about 70 or so circuits at 120V/220V. No I'm simulating that the project must be 115/230. I'm not seeing how to accomplish this? I've went in and changed connectors on the families and panel boxes but it seems to hold the previous voltages for the circuits even though all the families say 115 or 230. Is there any way to do this?

[mhartmann]

i would leave the system voltage 120/240. only mechanical and other trades use 115 on their name plates. it's all 120/240 to an electrician.

[DoTheBIM]

It's not a matter of trades preferences. Just wondering if this is a limitation of the Revit MEP product. I was trying to replicate and existing set of plans and didn't realize the voltage difference till much later. Can anyone confirm that it's not possible to change the circuit voltages to 115/230 after the fact?

[jason.martin]

Please take a look at the voltage definitions in Electrical Settings.

The voltage definitions include "ranges" of allowable voltages, so that is something is specified as 115V or 125V it can still be allowed to connect to a 120V circuit.

If you change the actual voltage values, it will also change the amount of current that is calculated for these circuits (which may not be what you want).

1200VA / 120V = 10A
1200VA / 115V = 10.4A

Changing the voltage of circuits isn't something that the application was meant to do. Voltages available for a panel are based on the distribution system that the panel uses, which is based (mostly) on the country in which the building is built, and isn't something that is often changed.

jason

[DoTheBIM]

Please take a look at the voltage definitions in Electrical Settings.

Jason gets the prize if there was one. I knew Revit couldn't be that limited. Even after changing all the electrical connectors it wouldn't update the circuit voltage. Simple settings change did the trick. All my schedules now match the existing hand drawings. Thanks very much. Now on to learn some of the basic HVAC stuff.