scotteng
Member
- Location
- Apollo Beach, FL
- Occupation
- Professional Engineer
I have a distribution system that was installed in the mid '80's. When first installed, it had an emergency generator with a single transfer switch feeding a single "emergency" panel (which fed both emergency and optional standby loads). Sometime about 10 years ago, a renovation occurred that added a generator distribution panel with two feeder breakers which in turn fed back to the original transfer switch (now deemed the optional stand-by ATS) and a new emergency ATS. The issue is this...the feeder that once fed the original ATS was looped through that ATS to get to the new generator distribution panel. Is it permissible to use an ATS as a raceway for emergency circuits? I understand emergency and non-emergency can be in an ATS together, but is there any interpretation regarding emergency circuits that simply use the ATS as a raceway?