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.

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What are the devices that can be used for Pole/Phase Selector Switching? [closed]

I am currently Making Operation of my 1 HP Water motor connection into automatic such that, it senses water in main input Water line and starts running till overhead tanks fill up. And for redundancy, ...
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4 votes
2 answers
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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 ...
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Can't plug my Bluetti AC300 into the grid and turn on AC output on the AC300 when plugged into Reliance ProTran2 manual transfer switch

I have a Reliance ProTran2 manual transfer switch plugged into my Bluetti AC300 battery backup system which has a floating ground. The AC300 is supposed to be used as a UPS backup system and pass grid ...
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16 circuit load center generac to with briggs and stratton

I have a Briggs and Stratton standby generator model 040301 7kw and want to use a Generac automated standby transfer switch with 16 circuit Load center 50amp, part 0j0391. Is this ok?
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Portable Generator with Manual Transfer Switch Troubleshooting

When I hook up a generator to my house via a transfer switch it does one of the following: Trips the main breaker on the generator immediately. It does this when the generator is neutral bonded. Or, ...
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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 (...
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What are benefits of a subpanel over pre configured 6 , 8 or 10 circuit Transfer Switch Kits? which one is better for Portable Generator?

I am planning for a Generator based power back up. Need to have the back up to run the sump pump in case the there is a power outage in Spring when the snow melts making water flow in my sump pit and ...
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2 votes
1 answer
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30a outdoor generator inlet box to transfer switch

I have a 8K watt running (10k peak) tri fuel generator with a cord to a 30a inlet box, which is on the exterior of my home. Can I run a single 35ft run of UF 10/3 straight from my inlet box to the ...
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Transfer switch- only connect hot lines for circuit

I have a Generac automatic standby generator with a 8 circuit transfer switch. I was wondering if because the neutral bars in the main breaker panel are directly connected to the neutral bar in the ...
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My Light switch and outlets in a different location and light switches no longer work after replacing a dimmer switch?

I replaced a dimmer switch bc it was buzzing at the switch. I got the new dimmer switch to work but I no longer have power to my outlets and other light switches in the same circuit. Some background ...
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3 answers
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Adding Transfer Switch to Main Breaker with no available ground/neutral spots on bus

I am installing a 10 circuit reliance manual transfer switch. I need to install the ground to the ground bar and the neutral to the neutral bar. However, both grounds and neutrals are mixed in my ...
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To use any generator with the house inlet, may one leave the generator ground wire unconnected in the inlet?

tl;dr: To facilitate using any generator with the house inlet, regardless of transfer switch type or generator neutral-ground-bond status, may one leave the generator ground wire unconnected in the ...
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Can 2 different portable generators be wired to off-grid cabin's single panel - not used simultaneously but rather one or the other at different times

We have an off-grid cabin. Currently we have a Champion 7500 watt dual fuel generator powered with propane that is connected by a 120/240v cord directly into the cabin's electrical circuit panel. The ...
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OK to start a house circuit wire with a plug, to plug into circuit panel outlet or generator breakout box?

Eventually I plan to put in a subpanel and transfer switch or circuit-breaker interlock for several house circuits to run from my generator, with all permitting and inspections. But as a temporary ...
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Wiring a 100 Amp Transfer Switch to main panel

I have a 100-Amp 240-Volt Outdoor Non-Fused Transfer Switch and would like to wire it to the main panel outside. My main panel has 3 breakers (Oven [25 Amp], A/C [50 Amp], & House [100 Amp]) my ...
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Breaker Size to feed a transfer switch from my 200 amp main

Hi I'm adding a 200 capable transfer switch that will draw power from my 200 amp main. I will move some circuits from the main to the transfer switch. I know I wouldn't be moving all the circuit over, ...
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741 views

400amp service entrance 200amp transfer switch

My local big box retailer has a decent priced 22kw lp generator/200amp transfer switch deal going right now. I'm considering purchasing it but I'm unsure on the correct way to go about my situation. I ...
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Can I have net-metering with an ATS between utility and batteries and diverse power inputs (solar, wind, generator) behind the batteries?

I would like to participate in net-metering until I have a solar array large enough to disconnect from the grid entirely. However, for various reasons, I am going to have an undersized solar array ...
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Default an appliance to off (no power) when on generator power and on when on utility power

I'm planning a generator installation (Generac PowerPact 7.5kw) with an ATS with 8 circuits (i.e. Not whole house). I want 240v hot water to always be on when on utility power. When the ATS switches ...
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Connecting a Honda 7000iS portable generator to a transfer switch

I recently purchased a Honda EU7000iS generator (manual) to power our house when the power goes out. The house came with a transfer switch but I'm unsure which cord to buy to connect the two. Can ...
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6 votes
3 answers
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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 ...
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2 votes
1 answer
567 views

One transfer switch, two main panels

Can a single manual transfer switch be wired to two main panels (both from same meter but they do not feed each other)? Specifically, if desired breakers cannot be consolidated into one panel and ...
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1 vote
1 answer
461 views

Can I wire a 200amp auto transfer switch from one metered service to two 100amp panels?

I have one metered service feeding two 100 amp panels separately one to the house then one to the garage. Can I install a 22kw generator and use one transfer switch for both 100 amp panels?
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Determining generator loads

See related question here: Using portable generator with transfer switch I live on a property with 600 AMP service (2x200AMP service to home, 1x200AMP service to workshop / barn). The home and barn ...
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Using portable generator with transfer switch

See related question here: Determining generator loads I live on a property with 600 AMP service (2x200AMP service to home, 1x200AMP service to workshop / barn). The home and barn are new ...
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Installing a generator transfer switch on an ITE Pushmatic panel

I have purchased a transfer switch,the Reliance Controls Corporation 31406CRK 30 Amp 6-circuit. The panel in question is a ITE Pushmatic, like the one in the picture except it has two main breakers on ...
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1 vote
2 answers
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Feeding single circuit from two different subpanels (with interlock)

I have a main panel and a critical loads sub-panel fed by a PV inverter + battery backup. I need to avoid overloading the normal capacity in the critical loads panel (50A), and I'm already at a ...
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2 answers
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setting up a secondary panel with generator (Wire Guidance needed)

I am attempting to gather the supplies needed to setup a secondary panel for a backup generator. The generator itself is a Westinghouse 7500 model that explicitly states that the neutral bonding has ...
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791 views

Generator Transfer Switch for 2 Panels

I'd like to install a Transfer Switch (10 circuits) from the Generator to the two panels I have. Each panel is rated at 200 amps. If I turn off the main breaker in one of them, the other panel still ...
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Recommendation for mounting transfer switch to vinyl sided exterior wall

I need to mount a Generac automatic transfer switch to my house beneath the meter base. The construction of the wall I need to mount to is (from outside inwards): 30 yr old vinyl siding (for which I ...
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Can I install 2 Reliance control pro Tran 2 transfer switch 10 circuit on same panel?

I believe I have a sub panel because there is a breaker at the meter to shut off power. There is also a separate neutral bar from the ground bar in my breaker box. Assuming I have that correct, onto ...
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1 answer
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Isolator switch for electric generator to change from bonded to floating neutral

I have an electric Power generator and have a manual transfer switch to use a Power generator when the utility power is out. So the electric power generator is used as is with bonded neutral when used ...
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Single pole breaker in Transfer Switch trips on transfer to GEN position every time but only on Master Bedroom circuit, 5 others OK

How can I use a single pole breaker in Transfer Switch to replace a Double Pole GFI breaker in box for bedroom lights and GFI Master Bathroom outlets? It trips every time I turn it on through transfer ...
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1 vote
2 answers
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Must a generator be connected permanently to the transfer switch?

I will soon be purchasing a 15K watt, 50A generator and an exterior 200A on/off/on transfer switch. Nothing is an issues except for connecting generator to transfer switch cabinet. Must a male/female ...
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1 answer
207 views

Installing a transfer switch

I too have a Generac 5500 Generator. It is safely positioned on the side of my home, a double - wide on block foundation , on a concrete pad. I have a super clean (even vacuumed) crawl space. I want ...
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5 votes
1 answer
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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 ...
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2 votes
1 answer
2k views

Connecting 240 volt generator to Main Panel

I read previous posts that explained that the Sub Panel has a separate connection for ground and separate for neutral, while the Main Panel does not separate the ground & neutral - this is exactly ...
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-1 votes
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Does the amp size have to match?

My home has three bathrooms in it and the outlets for all three are combined off one 20 amp breaker in the panel. Do I have to use one of the 20 amp breakers on the transfer switch or can I use one of ...
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Transfer switch worked but only to half the house, used to work fine. Any ideas? Thanks

We have a generac 20k generator and auto transfer switch. It has worked well for 3 years, but now when the power goes out it only switches over half the house. Any suggestions on troubleshooting would ...
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3 votes
1 answer
275 views

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 ...
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0 votes
2 answers
1k views

Ground wires: Do I have this right?

I have 200A load center with a solid bare #6 ground wire tied to a ground rod. Ground/Neutral are bonded in the box. Then run stranded #6 (does it have to bare?) to the 100A auto transfer switch. ...
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2 answers
828 views

Breaker Feeding a Transfer Switch

I have 200A service, but I want to add a whole house generator (GENERAC 17k) that has a 100A transfer switch. I plan to use a seperate 100A load center after the transfer switch for the backed up ...
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1 answer
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200A service to 100A transfer switch?

I have 200A service but, I want to add a whole house generator (GENERAC 17k), but my transfer switch is only 100A. Can I add a 200A subpanel (NEMA 3R 12-space with 200A main) on the outside of the ...
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2 votes
1 answer
571 views

I have a buried wire for a generator in my shed. Is there a safe way to reverse the feed to power the shed?

My current setup: Main panel has 60A 240 breaker that feeds Generator subpanel which has 10 circuits on it. The Gen Feed to the subpanel comes from buried 10-3 in my shed. That works well for running ...
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1 vote
1 answer
2k views

Manual Transfer Switch to power Main panel and Sub panel circuits

I had installed a Reliance model 31410CRK manual transfer switch, which has 10 individual circuits. I happen to have a Main panel, and a Sub panel which are a few feet apart. The Sub panel was ...
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can an indoor Transfer Switch be used on the other side of the wall as an outdoor service entrance and main panel?

Can an indoor Transfer Switch be used on the other side of the wall as an outdoor service entrance and main panel? The concept is: The outdoor service entrance is wired through the wall to the SE ...
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Two Breaker panels, one transfer switch?

I have two breaker "panels", one is a 200 amp panel for everything in the house, and a separate one (with a different meter) that is just for my electric cold water heater, right next to the other ...
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1 vote
1 answer
2k views

5500 Watt / 30 amp generator feeding 5000 Watt 20 amp manual transfer switch [closed]

I have a manual transfer switch that was installed approximately 10+ years ago that is rated 5000 Watt and 20 amp max input. The old generator died and was replaced with a Generac GP5500 / 6875 model....
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1 vote
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799 views

How to figure out max Watt rating for transfer switch?

We bought a home with a transfer switch installed (seems old, can't find any documentation for it anywhere on the internet). I'm trying to buy an appropriate generator, but am not sure how high of a ...
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What Automatic Transfer Switch can switch between parallel sources without a priority setting so as to run a well pump from either of two homes?

We have two homes sharing a single well. The other homeowner and I want to change our water system so that we each have our own Pressure Tank and we can each run the well pump with power from our own ...
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