Adding a standby generator in Cumming: the transfer switch rule and local permits
After a long outage, many Cumming owners decide a standby generator is worth it. The first rule is the same no matter which brand you choose: a generator wired into the house must not be able to send power back onto the utility line. Sawnee EMC's safety center says that if you own a generator and have it wired into your house, you must have a transfer switch to prevent electricity from feeding back on your service line and possibly injuring line workers trying to restore your power.
The second rule is local. A standby generator adds circuits and changes how the service is wired, so it falls under Forsyth County's permit requirement for circuit additions and service work, or the City of Cumming's electrical permit inside city limits.
What Sawnee EMC specifies for transfer switches
Sawnee's interconnection procedures for small distributed generation say that emergency generators serving a member's backup load panel require an automatic transfer switch or a manual transfer switch to isolate that panel during an outage, and that the member must comply with National Electrical Code requirements for standby power. For systems that supply part or all of the load during outages, the procedures require an open transition, break-before-make switching scheme.
The approved methods listed are a double-throw safety switch complying with UL 98, a transfer switch complying with UL 1008 designed for the purpose, a commercial-grade trapped key interlock system, or an isolation switch complying with UL 3008. The switch must be a fail-safe mechanical design that never lets the generator parallel the cooperative's system, and all transfer switches and schemes must be inspected and approved by the authority having jurisdiction over electrical installations, which means the City or County inspector.
Permits, gas and trenching
Inside city limits, the City of Cumming prices the electrical permit line by line, with a $40.00 minimum, and requires electrical rough-in and final inspections. In unincorporated Forsyth County, the Electrical Only Permit covers electrical-only work, and the County inspects to the 2023 National Electrical Code. A natural gas or propane connection is usually a separate trade, and the County's renovation packet asks for separate sub-contractor affidavits for each trade.
Many standby units sit on a pad away from the house, with conduit and gas line run underground. Georgia 811 asks everyone to contact 811 before digging, so utility lines are marked before the trench is cut.
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Request quotesSizing and planning
The size of the generator follows what you want to run. A whole-house unit may require a service-rated transfer switch, while a smaller unit may feed a separate backup panel. If your panel is near capacity, the panel upgrade guide explains how a service upgrade is permitted, and doing both at once can save a second inspection.
If a portable generator is what you have, read the portable generator and transfer switch guide; Sawnee says not to plug a generator into a wall outlet. Permit details are in the County and City guides. When you are ready, the form on this page lets independent local electricians contact you about the installation.