Can Multiple Transfer Switches Be Installed with a Single Generator?

When installing multiple transfer switches to be protected by a single generator, a relay may be necessary, and only one switch will provide the required T1 battery charge connection. Only wires 194/23/0 will be connected between the two transfer switches.

  • Jan 11, 2024
  • Knowledge

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Can Multiple Transfer Switches Be Installed with a Single Generator?
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Can-Multiple-Transfer-Switches-Be-Installed-with-a-Single-Generator

Public Answer

Multiple transfer switches in a home standby system

In a home standby system, an Automatic Transfer Switch (ATS) is a crucial component in a standby generator installation that allows for the automatic switching of electrical loads between the utility power source and the generator. See What Is an Automatic Transfer Switch (ATS)? for more information.

In situations where it is necessary to protect multiple transfer switches with a generator, it is possible for a single generator to protect up to 10 transfer switches. However, the installation of more than two transfer switches will require a relay to be mounted near the generator's control panel. This relay is used in case there is a voltage drop across the circuit. An example of a multi-ATS installation can be found here.

The generator will only sense utility from one switch and only one switch will provide the required T1 battery charge connection. Additionally, only wires 194/23/0 will be connected between the two transfer switches. For instructions on connecting the main power leads, it is best to consult with a local dealer.
 

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