ATS with Utility Service Disconnect Switch

[MHower]

Does an ATS with an Utility Service Disconnect switch satisfy the code as a service disconnect/emergency disconnect at the meter? I ask because once the switch is shut off, the standby generator will energize the home...I realize this seems redundant, but my ATS is labeled Service Disconnect/Emergency Disconnect...thoughts??

 

[JARSuites]

Might be an old post but hopefully the answer helps. If I am understanding the question correctly. I will assume this is residential.

The ATS is not a service disconnect(so the labeling is incorrect). The ATS is an automatic transfer switch that automatically transfers power from the utility side to the generator side when a lose of power is detected on the utility side. An ATS is not a means of disconnecting power, the ATS is a means of transferring power sources.

You would need a means of disconnecting power on the generator side before you hit your ATS. The utility side should already have a means of disconnecting power being you panelboard.

 

[d0nut]

A service rated ATS is designed to be the service disconnect. It has the overcurrent protection, bonding, and labeling required for a service. For a residential service, it would meet the requirements for a service disconnect/emergency disconnect if it were located outside of the building. Completely removing power to the building would require disconnecting both the utility service at the ATS and the generator feed at the generator or other disconnecting means, which would be the same requirement for any facility with automatic transfer switches.

 

[augie47]

Agree with dOnut. If the ATS is listed service equipment it will incorporate a service disconnect.
The generator signage would have to comply with 702.7 regardless of the service disconnect being an ATS or separate device