Home Improvement Stack Exchange
Home Improvement Stack Exchange

Questions tagged [transfer-switch]

This is for transfer (generator) switches or interlocks, used with portable or hard-wired backup (standby) generators. Manual and automatic transfer switches are included, as well as breaker interlocks and inverter transfer systems.

97 questions
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Does the NEC allow a sub panel to be powered by a generator and an automatic transfer switch?

I plan to install a sub panel next to my main panel. Mainly because as I do electrical upgrades, I'm accumulating more circuit breakers. Since I need one anyway, I'd like to be able to power it with a backup generator during power outages. I'd also…
Mike Gray
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How can I ensure a level 2 EV charger will not run while my standby generator is running?

I have a standby generator with an automatic transfer switch. It is set up to power all the circuits in my house. It does not have high enough wattage to power an EV charger in addition to the current load. If I installed a level 2 EV charger is…
Jared
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Generator tripping GFCI breakers in main panel

I recently had some electrical work done on my home to bring it up to code - there was no GFCI protection in the kitchen or bathroom when we bought the house, so our electrician fitted GFCI breakers at the panel. He did not use the GFCI outlets…
rk15000
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Half of my lights and oulets are not working after heavy winds?

We have solar panels and mains power. Last night was very windy; we heard quite a few bangs from outside and thought it might be the wires getting knocked together. Woke up this morning and we have power to everything except the lights and our…
phil
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What's the best way to connect transfer switch and sub panel?

I purchased a used Generac 10kva with a transfer switch and am in the final stages of getting things setup. The generator itself has a 45a breaker on it and I've got 6 ga wire running from it to the transfer switch along with the 4 control wires.…
andyknas
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8500 W generator with L14-30 plug.. How to access full capacity for house?

As an emergency generator I purchased a Wpro8500 from Westinghouse. My house has a transfer switch and the wiring supports 240V 50A. The generator has a few outputs, but the 240V is a 30A. This limits the total power to 7200 watts. The generator is…
Jesse Brown
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How should I hook up my generator to a manual transfer switch?

I have a couple of questions about hooking up a generator to a manual transfer switch and I'm really hoping somebody with knowledge can help guide me here. The idea is I will have an exterior weather-proof plug that I can plug the generator…
Acadia
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Need dead time before transfer back to utility from Generac

I have a 25kW liquid cooled Generac for whole house, using transfer switch RXSW200A3 (200A, service rated). Is there a way to get a "dead time" before the transfer back to the utility source when it comes back hot? I'd like at least a tenth of a…
relayman357
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Generator automatic transfer switch + main panel not configured as sub panel

I bought a house in Massachusetts (USA) that was built around 2009. It has a generator with a service rated automatic transfer switch (ATS) connected to a main panel that is set up as a main panel (NOT a sub panel). I don't know if the generator was…
Bonfire
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1 generator + multiple ATSes: how can I install this to Code without unobtanium?

I want to supply standby power to both units in a separately metered duplex from a single permanently installed generator. The cheapest way to do this is a pair of bog-standard ATSes and a smallish loadcenter to serve as a generator distribution…
ThreePhaseEel
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What do I do with the neutral and ground when wiring a transfer switch?

I know there are a lot of questions about wiring a generator to a home electrical panel, but I can't find the answer to the questions that I have. I would like to wire a generator that has the neutral bonded to the frame, to my main panel. The GE…
John Heggie
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Can you install a manual emergency backup battery/transfer switch with less power than the circuit you're backing up?

I have a few circuits in my house that I would like to be able to power during an outage with a portable battery backup system (something like the Ecoflow Delta Pro). I'm trying to understand if what I'm envisioning is possible with either a…
jat255
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Generator Transfer Switch Current Rating

I have a 30 amp generator (5R-30 connectors) and expect to buy either a 310C Pro/Tran2 30-Amp 10-Circuit 2 Manual Transfer Switch or a A510C Pro/Tran2 50-Amp 10-Circuit 2 Manual Transfer Switch. Would the A510C Pro provide any "future proofing" by…
Henry Lichstein
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Which type transfer switch for EV to house branch circuits? Two EV outlets. One seems bonded, the other not

I've read a bunch about floating vs bonded neutral generators but very little about vehicle inverters like my KIA EV6 that has two AC outlets. I believe to be safe I need to know if the outlets are bonded or floating so I put a circuit tester on…
Doug Trottman
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How to wire in a backup generator?

Growing up in the mountains of CA the power would go out damn near every time it snowed so my dad finally had enough and got a 4k or 5k generator when i was young. When the power would go out the process was turn off the main breaker that supplies…
rasmukri
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