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What is a Service Entrance-rated transfer switch?

A service entrance-rated transfer switch is a transfer switch that contains an integrated disconnecting device and meets the grounding and bonding requirements of the National Electrical Code for...

What are the replacement controllers for the ASCO 165?

There are two versions of the Group 3 controllers for the legacy model ASCO 165: the 4-wire start version and the 2-wire start version. While there may be residual stock for the 4-wire start version...

How do I perform a Transfer Test on an ASCO 300 Series Transfer Switch...

To perform a Transfer Test, press the Transfer Test button and confirm by pressing the Enter button. If password must be entered, enter "1111" (default password). Please refer to the...

How to test the rectifier?

A bridge rectifier is composed of diodes. There are two ways to test a diode. A. Through a Diode Test First, make sure to disconnect the white wires and black wires from the bridge rectifier. Then,...

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What is the difference between in-sync and in-phase?

There is often confusion between the in-phase and the In-sync features of ASCO transfer switches. It is important to understand the difference between these features especially during the process of...