Connecting Devices to a Circuit

Anthony Conte

February 19, 2026 15:17

Command

Command	Description
`ATCONNECT`	Connect selected devices to the active circuit

Prerequisites

A FireCAD project must be open
An active circuit must be selected in the Circuits palette
The active drawing must be part of the project

Overview

The ATCONNECT command adds selected devices to the currently active circuit. Connected devices become part of the circuit's topology, receiving wire labels, addresses, and appearing in circuit-based reports.

Steps

Select the target circuit in the Circuits palette (it becomes the active circuit)
Type ATCONNECT in the AutoCAD command line
You are prompted: "Select devices to connect to '[Circuit Name]':"
Select one or more compatible devices in the drawing
Press Enter to confirm the selection
The devices are added to the circuit
You can continue selecting more devices (press Escape to finish)

How It Works

Selected devices are added to the circuit as non-origin devices (they are endpoints or intermediate devices, not the circuit source)
Each device receives a sequence number (MasterSequence) in the order it was connected
Compatible devices are highlighted during selection to help you identify valid targets
After connection, device labels and wirepath labels update automatically

Tips

Only devices compatible with the circuit's type can be connected — incompatible devices won't be selectable
To connect a device at a specific position in the circuit sequence, use ATINSERT_IN_CIRCUIT instead
To change the circuit a device is on, disconnect it first with ATDISCONNECT, then reconnect
After connecting devices, use ATAUTO_DRAW_ACTIVE_WIREPATH to draw the wirepath between them

Related Commands

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