Transfer switch & interlock installation in York, PAThe safe way to put generator power in your panel.
A transfer switch is what hands your home from the utility to your generator and back, without ever mixing the two. Jamie installs automatic switches for standby generators and interlock kits, manual switches and inlet boxes for portables.
Portable generators
How a portable hookup comes together.
With an inlet box and an interlock or manual switch, your portable generator powers the circuits you need with one cord, and no extension cords through a window.
Portable generator
Outside, well away from doors, windows and vents.
Generator cord
One heavy-duty cord, sized for the generator.
Inlet box
A weatherproof outlet on the outside wall to plug into.
Interlock or switch
Keeps generator power and utility power from ever mixing.
Your circuits
Furnace, fridge, sump pump and lights, on generator power.
From recent jobs
Switch work from recent jobs.
Transfer switches mounted, wired and squared up beside the meter and panel.
Inside a new transfer switch 
Meter, disconnect and switch, squared up 
Transfer switch wired beside the panel 
Switch gear mounted by the meter 
Two transfer switches, indoors
Why it matters
Never back‑feed your house.
Plugging a generator into a wall outlet with a double-ended cord sends power backward into your panel, and out onto the utility lines.
- Line workers repairing the outage can be hurt by power they don’t expect.
- Your house is at risk of overloaded wiring and fire.
- Your generator can be destroyed when utility power comes back on.
A transfer switch or interlock makes it physically impossible for the two sources to meet. That’s the whole point of the job.
Transfer switch questions
Switches, interlocks and inlets.
Still have a question?
Jamie answers every call and request within one business day.
Do I need a transfer switch for my generator?
Yes, if you want the generator to power circuits in your house. A transfer switch or interlock is what safely separates your home from the utility lines while the generator runs.
What is the difference between an interlock kit and a transfer switch?
An interlock kit mounts on your existing main panel and lets you power whichever circuits you turn on. A manual transfer switch is a separate small panel wired to a fixed set of circuits. Both are switched by hand and work with portable generators.
Can I just plug my generator into an outlet?
No. Back-feeding through an outlet with a double-ended cord is dangerous: it can energize the utility lines, injure line workers, start a fire and damage your generator. Use an inlet box with an interlock or transfer switch.
Will an automatic transfer switch work with a portable generator?
Automatic transfer switches are designed for home standby generators, which start on their own. Portable generators are started by hand and connect through an interlock kit or manual transfer switch.
How much does a transfer switch installation cost?
It depends on the type of switch, your panel, and how far the inlet box is from it. Jamie looks at your setup and quotes the complete installation.
Connect your generator the right way.
Tell Jamie what generator you have, or are planning, and he’ll recommend the right switch and quote the install. Replies within one business day, or call (717) 668-9144.