Bthespark05
New User
- Location
- Massachusetts
- Occupation
- Journeyman electrician
Hi I live out here in Massachusetts where we have adopted the 2020 nec code changes. I've been looking for some clarification on optional whole house stand by generators.
Let's say you have an existing 100 amp underground service with a remote meter pedestal. The conduits come through the foundation into the back if the panel. I unsecure the panel and move it over enough to install the whole house transfer switch and then nipple into the existing panel. The generator is a 22kw.
Does this mean I have to now install a 100amp main fused disconnect on the outside of the house? Either remove meter socket and install a meter main, a nema 3 main breaker beside meter socket or below, dig up the conduit at the house and reroute it to a main breaker on the side of the house and then run a #2 ser into the transfer switch?
Also does a rapid emergency shut down switch have to be located "grouped" next to the service main disconnect?
These are some of the things I'm hearing, but some towns say you dont need to do the main breaker if it's an existing service. I know you do have to have a 2nd emergency shut down switch for the generator if it's over 14kw.
Some of the articles I have found that relate to this topic are 230.85 emergency disconnect for service needed, and 445.18D emergency disconnect for generator required.
Any inputs would be appreciated. I've talked with multiple inspectors who say you dont need to do the service disconnect if it's an existing service and a couple that say you do. I wish the code was more black and white so it's not left up for multiple interpretations. Thanks for reading!
Let's say you have an existing 100 amp underground service with a remote meter pedestal. The conduits come through the foundation into the back if the panel. I unsecure the panel and move it over enough to install the whole house transfer switch and then nipple into the existing panel. The generator is a 22kw.
Does this mean I have to now install a 100amp main fused disconnect on the outside of the house? Either remove meter socket and install a meter main, a nema 3 main breaker beside meter socket or below, dig up the conduit at the house and reroute it to a main breaker on the side of the house and then run a #2 ser into the transfer switch?
Also does a rapid emergency shut down switch have to be located "grouped" next to the service main disconnect?
These are some of the things I'm hearing, but some towns say you dont need to do the main breaker if it's an existing service. I know you do have to have a 2nd emergency shut down switch for the generator if it's over 14kw.
Some of the articles I have found that relate to this topic are 230.85 emergency disconnect for service needed, and 445.18D emergency disconnect for generator required.
Any inputs would be appreciated. I've talked with multiple inspectors who say you dont need to do the service disconnect if it's an existing service and a couple that say you do. I wish the code was more black and white so it's not left up for multiple interpretations. Thanks for reading!