A standby generator transfer switch wiring diagram should clearly indicate which circuits should be fed from the utility to the generator. The utility circuits should be fed from a double-pole breaker located at the main load center. Some diagrams also indicate switching the neutral wire. However, many systems do not switch the neutral wire.
Automatic selective circuit transfer switch
An automatic transfer switch is an integral part of an emergency power supply system. It allows a safe transition from utility to standby generator power and maintains isolation between sources. This is a critical safety feature because the transfer switch prevents backfeeding, which can damage utility equipment and injure utility workers. It also protects data networks, telecommunications, and critical installations and processes.
Automatic transfer switches can be configured to control all or selected circuits in a home. These switches typically have three positions: LINE, GEN, and OFF. The GEN position feeds the selected circuits, while the LINE position feeds the remaining circuits. The switch has a positive break to prevent short circuits and sparking. Individual circuit protectors also protect the selected circuits from overload. This way, a larger generator can be connected without overloading the house.
An Interlock Kit is a safety device that is used to prevent the transfer of generator power into the electric grid. This device is essential because it can be dangerous for technicians working on the electric lines. It is essential to ensure that the interlock is installed properly so that no power is lost.
The first step in installing an Interlock Kit is to identify which circuits are affected by the power from your standby generator. These circuits may include your refrigerator, heating system, and well pump. Identifying which circuits are affected by the generator will enable you to choose a suitable interlock kit. If your main circuit breaker is close to one of the generator circuits, you will need to move that circuit to a different location. To make this happen, you will need to drill a hole in the wood siding. To make this hole, use two spade drill bits. The first bit should be 7/8 inches deep. The second bit should be about 1/2 inch deep.
Once installed, an Interlock Kit will control the power flowing to your standby generator from the electrical panel. It will prevent the main breaker from operating at the same time as the generator. This prevents electrical feedback that can cause harm.
Cost of a manual transfer switch
The cost of a manual standby generator transfer switch is typically between $500 and $1,500. Installation is relatively simple and should take no longer than a day. It is a good idea to schedule your installation well in advance. If the installation is delayed, you may have difficulty finding a service technician during a major storm.
The price of a manual transfer switch is typically lower than the price of an automatic switch. However, the cost of an electrician to install it will likely be about 15 percent higher. It is advisable to get multiple quotes when shopping for a manual transfer switch.