BreakerRating is a plugin for Autodesk® Revit® that calculates the breaker standard rating according the load of each created electrical circuit.

The plugin has 3 buttons: Rating, data and table.

The plugin associates 5 shared parameters to the category of electrical circuits:

• brfactor: Shared parameter type number; it is a factor equal to or greater than 1 (Recommended 1.25), which is multiplied by the apparent current (Revit Parameter) of each circuit to choose the next size up of the standard values of the NEC NFPA 70 standard breakers.

• brminimun: Shared parameter type number; it is a parameter that can be 15 A, 20 A, 25 A or 30 A, which means that it is the standard minimum value that the circuit breaker will consider.

• brbreakerpoles: Shared parameter type text; it combines the values of the Rating and the number of poles in the circuit (Example: 25/2, 25 A / 2 poles).

• brconduit: Shared parameter type text; conduit parameter in inches of the diameter of the conduit of the circuit, according to the Wire Size, it can has the following data: ½, ¾, 1, 1 ¼, 1 ½, 2, 2 ½, 3, 3 ½, 4, 5 or 6 inches.

• bruserlock: Shared parameter Yes/No type; parameter that will be always OFF with the activation of the plugin, this shared parameter can only be modified manually by the user per circuit, if the shared parameter is ON the plugin will not change the Rating parameter, this allows to the user for example control the Rating value of a circuit for oversize, or to set the desired value.

The Rating button calculates the standard capacity of the breaker by multiplying the parameter brfactor*apparent current and the conduit diameter of the circuit, to select the immediate superior standard among the following values: 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 125, 150, 175, 200, 225, 250, 300, 350, 400, 450, 500, 600, 700, 800, 1000, 1200, 1600, 2000, 2500, 3000.

The Rating button assigns to the aforementioned shared parameters the corresponding values and to the Rating parameter the standard value, adjusting the Wire Size of the circuit.

The Data button shows a window to save the work values corresponding to the breaker factor (brfactor) and the minimum value (brminimun).

The window has a checkbox named “Update”, it allows to the user update all the circuits to the calculation values. With the checkbox Update in off mode the user could change the breaker factor and minium value of the breaker manually; the other checkbox named “Electrical circuit with lighting fixtures (Rating minimun 15 A)” allows to the user set the Rating of electrical circuits with Lighting Fixtures devices connected to a value of 15 A minimun.

The Table button shows an electric circuit type table with the calculated parameters.

Once a circuit has been created, the shared parameters will be empty. When the Rating button is run, these values will be assigned numbers or texts. To modify these values (brfactor and brminimun), once this button is executed, the brfactor and brminium values must be adjusted in the circuit table.